guava | Google core libraries for Java

by google Java Version: v31.1 License: Apache-2.0

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kandi X-RAY | guava Summary

guava is a Java library. guava has no bugs, it has build file available, it has a Permissive License and it has high support. However guava has 1 vulnerabilities. You can download it from GitHub, Maven.

Google core libraries for Java

Support

Quality

Security

License

Reuse

kandi-support Support

guava has a highly active ecosystem.
It has 44260 star(s) with 9887 fork(s). There are 2429 watchers for this library.
There were 1 major release(s) in the last 12 months.
There are 646 open issues and 2703 have been closed. On average issues are closed in 211 days. There are 101 open pull requests and 0 closed requests.
It has a positive sentiment in the developer community.
The latest version of guava is v31.1

guava Support

Best in #Java

Average in #Java

guava Support

Best in #Java

Average in #Java

quality kandi Quality

guava has 0 bugs and 0 code smells.

guava Quality

Best in #Java

Average in #Java

guava Quality

Best in #Java

Average in #Java

security Security

guava has 1 vulnerability issues reported (0 critical, 0 high, 1 medium, 0 low).
guava code analysis shows 0 unresolved vulnerabilities.
There are 0 security hotspots that need review.

guava Security

Best in #Java

Average in #Java

guava Security

Best in #Java

Average in #Java

license License

guava is licensed under the Apache-2.0 License. This license is Permissive.
Permissive licenses have the least restrictions, and you can use them in most projects.

guava License

Best in #Java

Average in #Java

guava License

Best in #Java

Average in #Java

build Reuse

guava releases are available to install and integrate.
Deployable package is available in Maven.
Build file is available. You can build the component from source.
Installation instructions, examples and code snippets are available.
guava saves you 1095367 person hours of effort in developing the same functionality from scratch.
It has 511012 lines of code, 53150 functions and 3074 files.
It has medium code complexity. Code complexity directly impacts maintainability of the code.

guava Reuse

Best in #Java

Average in #Java

guava Reuse

Best in #Java

Average in #Java

Top functions reviewed by kandi - BETA

kandi has reviewed guava and discovered the below as its top functions. This is intended to give you an instant insight into guava implemented functionality, and help decide if they suit your requirements.

Builds a new instance from the given Hasher array .
Returns a set of possible combinations .
Populate a mapping between type variables .
Initializes this Future .
Get the value of the future .
Performs a new cell with a new cell .
Parse an IPV6 string into its numeric format .
Finds the last item in the stream .
Blocks until the thread is interrupted .
Returns a new Multiset containing the sum of the given multiset .

guava Key Features

Google core libraries for Java

guava Examples and Code Snippets

See all related Code Snippets

Adding Guava to your build

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&lt;dependency&gt;
  &lt;groupId&gt;com.google.guava&lt;/groupId&gt;
  &lt;artifactId&gt;guava&lt;/artifactId&gt;
  &lt;version&gt;31.1-jre&lt;/version&gt;
  &lt;!-- or, for Android: --&gt;
  &lt;version&gt;31.1-android&lt;/version&gt;
&lt;/dependency&gt;

Dart Flutter FAILURE: Build failed with an exception. Error

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storePassword=secure
keyPassword=secure
keyAlias=key
storeFile=../key.jks

android datastore-preferences: Property delegate must have a 'getValue(Context, KProperty<*>)' method

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import java.util.prefs.Preferences

import androidx.datastore.preferences.core.Preferences

val Context.dataStore by preferencesDataStore(name = "settings")

-----------------------

import java.util.prefs.Preferences

import androidx.datastore.preferences.core.Preferences

val Context.dataStore by preferencesDataStore(name = "settings")

-----------------------

import java.util.prefs.Preferences

import androidx.datastore.preferences.core.Preferences

val Context.dataStore by preferencesDataStore(name = "settings")

android:exported needs to be explicitly specified for <activity>. Apps targeting Android 12 and higher are required to specify

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<receiver android:name="<name_of_the_entry>"
                android:exported="false or true"
                tools:node="merge" />

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     <activity
                android:name="<activity which is giving error>"
                android:exported="true"
                tools:node="merge" />

-----------------------

<activity android:name="name_of_the_activity_inside_library>"
    android:exported="false|true"
    tools:node="merge" />

-----------------------

debugImplementation "androidx.fragment:fragment-testing:<version>"

androidTestImplementation "androidx.fragment:fragment-testing:<version>"

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debugImplementation "androidx.fragment:fragment-testing:<version>"

androidTestImplementation "androidx.fragment:fragment-testing:<version>"

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 android:exported="true"

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androidTestImplementation "androidx.test.ext:junit:1.1.3"
androidTestImplementation "androidx.compose.ui:ui-test-junit4:1.0.4"

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> java.util.concurrent.ExecutionException: com.android.builder.testing.api.DeviceException: com.android.ddmlib.InstallException: INSTALL_PARSE_FAILED_MANIFEST_MALFORMED: Failed parse during installPackageLI: /data/app/xxxxx.tmp/base.apk (at Binary XML file line #129): YOUR.FULLY.QUALIFIED.NAME.FAILING.ACTIVITY: Targeting S+ (version 31 and above) requires that an explicit value for android:exported be defined when intent filters are present

-----------------------

<activity android:name="androidx.test.core.app.InstrumentationActivityInvoker$BootstrapActivity"
android:exported="true"
tools:node="merge"/>

<activity android:name="androidx.test.core.app.InstrumentationActivityInvoker$EmptyActivity"
android:exported="true"
tools:node="merge"/>

<activity android:name="androidx.test.core.app.InstrumentationActivityInvoker$EmptyFloatingActivity"
android:exported="true"
tools:node="merge"/>

-----------------------

 <activity
        android:name="com.test.activity.SplashActivity"
        android:clearTaskOnLaunch="true"
        android:label="@string/app_name"
        android:launchMode="singleTop"
        android:noHistory="true"
        android:screenOrientation="portrait"
        android:theme="@style/AppTheme.NoActionBar"
        android:exported="true">

   <receiver
        android:name="com.test.receiver.ShareReceiver"
        android:exported="true">
        <intent-filter>
            <action android:name="com.test.fcm.android.action.broadcast" />
        </intent-filter>
    </receiver>

   <service
        android:name="com.google.android.gms.tagmanager.InstallReferrerService"
        android:exported="true" />

testImplementation 'junit:junit:4.13.2' 
androidTestImplementation 'androidx.test:runner:1.4.0'
androidTestImplementation 'androidx.test.espresso:espresso-core:3.4.0'
implementation 'com.razorpay:checkout:1.6.15'

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 <activity
        android:name="com.test.activity.SplashActivity"
        android:clearTaskOnLaunch="true"
        android:label="@string/app_name"
        android:launchMode="singleTop"
        android:noHistory="true"
        android:screenOrientation="portrait"
        android:theme="@style/AppTheme.NoActionBar"
        android:exported="true">

   <receiver
        android:name="com.test.receiver.ShareReceiver"
        android:exported="true">
        <intent-filter>
            <action android:name="com.test.fcm.android.action.broadcast" />
        </intent-filter>
    </receiver>

   <service
        android:name="com.google.android.gms.tagmanager.InstallReferrerService"
        android:exported="true" />

testImplementation 'junit:junit:4.13.2' 
androidTestImplementation 'androidx.test:runner:1.4.0'
androidTestImplementation 'androidx.test.espresso:espresso-core:3.4.0'
implementation 'com.razorpay:checkout:1.6.15'

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 <activity
        android:name="com.test.activity.SplashActivity"
        android:clearTaskOnLaunch="true"
        android:label="@string/app_name"
        android:launchMode="singleTop"
        android:noHistory="true"
        android:screenOrientation="portrait"
        android:theme="@style/AppTheme.NoActionBar"
        android:exported="true">

   <receiver
        android:name="com.test.receiver.ShareReceiver"
        android:exported="true">
        <intent-filter>
            <action android:name="com.test.fcm.android.action.broadcast" />
        </intent-filter>
    </receiver>

   <service
        android:name="com.google.android.gms.tagmanager.InstallReferrerService"
        android:exported="true" />

testImplementation 'junit:junit:4.13.2' 
androidTestImplementation 'androidx.test:runner:1.4.0'
androidTestImplementation 'androidx.test.espresso:espresso-core:3.4.0'
implementation 'com.razorpay:checkout:1.6.15'

-----------------------

"com.google.dagger:hilt-android:2.38.1"
"com.google.dagger:hilt-android-gradle-plugin:2.38.1"
"com.google.dagger:hilt-android-compiler:2.38.1"
"com.google.dagger:hilt-android-testing:2.38.1"

"com.google.dagger:hilt-android:2.40.5"
"com.google.dagger:hilt-android-gradle-plugin:2.40.5"
"com.google.dagger:hilt-android-compiler:2.40.5"
"com.google.dagger:hilt-android-testing:2.40.5"

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"com.google.dagger:hilt-android:2.38.1"
"com.google.dagger:hilt-android-gradle-plugin:2.38.1"
"com.google.dagger:hilt-android-compiler:2.38.1"
"com.google.dagger:hilt-android-testing:2.38.1"

"com.google.dagger:hilt-android:2.40.5"
"com.google.dagger:hilt-android-gradle-plugin:2.40.5"
"com.google.dagger:hilt-android-compiler:2.40.5"
"com.google.dagger:hilt-android-testing:2.40.5"

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<receiver
    android:name="com.razorpay.RzpTokenReceiver"
    android:exported="false">
    <intent-filter>
        <action android:name="rzp.device_token.share" />
    </intent-filter>
</receiver>

<activity
    android:name="com.razorpay.CheckoutActivity"
    android:configChanges="keyboard|keyboardHidden|orientation|screenSize"
    android:exported="true"
    android:theme="@style/CheckoutTheme">
    <intent-filter>
        <action android:name="android.intent.action.MAIN" />
        <data
            android:host="rzp.io"
            android:scheme="io.rzp" />
    </intent-filter>
</activity>

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android:exported="true" <!-- or false as required -->

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<activity
     android:name=".MainActivity"
     android:exported="true" <** add this line on AndroidManifest.xml**
     android:launchMode="singleTop"
     android:theme="@style/LaunchTheme"
 </activity>

Could not resolve com.google.guava:guava:30.1-jre - Gradle project sync failed. Basic functionality will not work properly - in kotlin project

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    repositories {
        mavenCentral()
        google()
    }

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// Top-level build file where you can add configuration options common to all sub-projects/modules.
buildscript {
    repositories {
        mavenCentral()
        google()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:7.1.1'

        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle files
    }
}

allprojects {
    repositories {
        mavenCentral()
        google()
    }
}

task clean(type: Delete) {
    delete rootProject.buildDir
}

Cannot locate a Guava Jar in the gradle distribution?

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plugins {
   id("org.asciidoctor.jvm.pdf") version "3.2.0"
   id("org.asciidoctor.jvm.gems") version "3.2.0"
   id("org.asciidoctor.jvm.convert") version "3.2.0"
}

Unable to find out where reflections-maven plugin comes from

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<project ...>
 ...
 <build>
   <plugins>
     <artifactId>maven-help-plugin</artifactId>
     <version>3.2.0</version> <!-- or higher! -->
   </plugins>
 </build>
 ...
</project>

mvn -Dverbose=true -Doutput=./eff.pom.xml \
  org.apache.maven.plugins:maven-help-plugin:3.2.0:effective-pom

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<project ...>
 ...
 <build>
   <plugins>
     <artifactId>maven-help-plugin</artifactId>
     <version>3.2.0</version> <!-- or higher! -->
   </plugins>
 </build>
 ...
</project>

mvn -Dverbose=true -Doutput=./eff.pom.xml \
  org.apache.maven.plugins:maven-help-plugin:3.2.0:effective-pom

Java method should cache the results

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<project>
    <!-- only defaults ..., and: -->
    <dependencies>
        <dependency>
            <groupId>com.google.guava</groupId>
            <artifactId>guava</artifactId>
            <version>31.0.1-jre</version>
        </dependency>
    </dependencies>
    <properties>
        <maven.compiler.source>17</maven.compiler.source>
        <maven.compiler.target>17</maven.compiler.target>
    </properties>
</project>

package com.stackoverflow.cache.test;

import com.google.common.cache.CacheBuilder;
import com.google.common.cache.CacheLoader;
import com.google.common.cache.LoadingCache;
import java.util.LinkedHashMap;
import java.util.Scanner;
import java.util.concurrent.ExecutionException;

public class Main {
  
  static final LoadingCache<String, LinkedHashMap<Character, Integer>> CACHE = CacheBuilder.newBuilder()
      .build( // with defaults, and this loader:
          new CacheLoader<String, LinkedHashMap<Character, Integer>>() {
        @Override
        public LinkedHashMap<Character, Integer> load(String key) {
          System.out.format("Key: \"%s\" not cached.%n", key);
          return analyze(key); // invoking "expensive calculation"! 
        }
      });

  public static void main(String[] args) throws ExecutionException {
    try ( Scanner consoleScanner = new Scanner(System.in)) {
      String word = consoleScanner.nextLine().trim(); // line wise! (for word-wise: next())
      while (!"bye".equalsIgnoreCase(word)) {// from Yoda, greetings! https://blog.codinghorror.com/new-programming-jargon/#1 ;)
        System.out.println(CACHE.get(word));// invoke cache, instead of "expensive" calculation!
        word = consoleScanner.nextLine().trim(); // line wise! (for word-wise: next())
      }
      System.out.println("Bye!");
    }
  }

  // basically your charCounter method with single parameter + stream:
  static LinkedHashMap<Character, Integer> analyze(String arg) {
    LinkedHashMap<Character, Integer> elements = new LinkedHashMap();
    arg.chars().forEach((num) -> {
      Character c = (char) num;
      if (elements.containsKey(c)) {
        elements.put(c, elements.get(c) + 1);
      } else {
        elements.put(c, 1);
      }
    });
    return elements;
  }
}

>Java is the best programming language in the world!
Key: "Java is the best programming language in the world!" not cached.
{J=1, a=5, v=1,  =8, i=3, s=2, t=3, h=2, e=4, b=1, p=1, r=3, o=2, g=4, m=2, n=3, l=2, u=1, w=1, d=1, !=1}
>hello
Key: "hello" not cached.
{h=1, e=1, l=2, o=1}
>hello
{h=1, e=1, l=2, o=1}
>bye
Bye!

public static void main(String[] args) throws ExecutionException {
  for (String word : args) {
    System.out.println(CACHE.get(word)); // ...or custom "print" method
  }
}

// limited version:
static final int MAX_ENTRIES = 100;
static final Map<String, Map<Character, Integer>> CACHE = new LinkedHashMap<>(
  MAX_ENTRIES + 1, // initial capacity
  1.0f, // load factor: better 1. than 0.75 (in this setup!?)
  true // "accessOrder" flag
) {
    // eviction: "...This method is invoked by put and putAll after inserting a new entry into the map"
    public boolean removeEldestEntry(Map.Entry eldest) {
        return size() > MAX_ENTRIES;
    }
};

// no limit, no "order", no evict, no outdate:
static final Map<String, Map<Character, Integer>> CACHE = new HashMap<>();

 ... CACHE = Collections.synchronizedMap(new xxxMap...);

static Map<Character, Integer> load(String key) {
  final Map<Character, Integer> result; 
  if (CACHE.containsKey(key)) { // cached!
    result = CACHE.get(key);
    // to "refresh" key, put it again (LRU):
    // CACHE.put(key, result); // here or outside the if-else
  } else { // "expensive" calculation:
    result = analyze(key); // ... and add to cache (unlimited, or removingEldest(imlicitely!!)):
    CACHE.put(key, result);
  }
  return result;
}

public static void main(String[] args) {
  for (String word : args) {
    System.out.println(load(word));
  }
}

-----------------------

<project>
    <!-- only defaults ..., and: -->
    <dependencies>
        <dependency>
            <groupId>com.google.guava</groupId>
            <artifactId>guava</artifactId>
            <version>31.0.1-jre</version>
        </dependency>
    </dependencies>
    <properties>
        <maven.compiler.source>17</maven.compiler.source>
        <maven.compiler.target>17</maven.compiler.target>
    </properties>
</project>

package com.stackoverflow.cache.test;

import com.google.common.cache.CacheBuilder;
import com.google.common.cache.CacheLoader;
import com.google.common.cache.LoadingCache;
import java.util.LinkedHashMap;
import java.util.Scanner;
import java.util.concurrent.ExecutionException;

public class Main {
  
  static final LoadingCache<String, LinkedHashMap<Character, Integer>> CACHE = CacheBuilder.newBuilder()
      .build( // with defaults, and this loader:
          new CacheLoader<String, LinkedHashMap<Character, Integer>>() {
        @Override
        public LinkedHashMap<Character, Integer> load(String key) {
          System.out.format("Key: \"%s\" not cached.%n", key);
          return analyze(key); // invoking "expensive calculation"! 
        }
      });

  public static void main(String[] args) throws ExecutionException {
    try ( Scanner consoleScanner = new Scanner(System.in)) {
      String word = consoleScanner.nextLine().trim(); // line wise! (for word-wise: next())
      while (!"bye".equalsIgnoreCase(word)) {// from Yoda, greetings! https://blog.codinghorror.com/new-programming-jargon/#1 ;)
        System.out.println(CACHE.get(word));// invoke cache, instead of "expensive" calculation!
        word = consoleScanner.nextLine().trim(); // line wise! (for word-wise: next())
      }
      System.out.println("Bye!");
    }
  }

  // basically your charCounter method with single parameter + stream:
  static LinkedHashMap<Character, Integer> analyze(String arg) {
    LinkedHashMap<Character, Integer> elements = new LinkedHashMap();
    arg.chars().forEach((num) -> {
      Character c = (char) num;
      if (elements.containsKey(c)) {
        elements.put(c, elements.get(c) + 1);
      } else {
        elements.put(c, 1);
      }
    });
    return elements;
  }
}

>Java is the best programming language in the world!
Key: "Java is the best programming language in the world!" not cached.
{J=1, a=5, v=1,  =8, i=3, s=2, t=3, h=2, e=4, b=1, p=1, r=3, o=2, g=4, m=2, n=3, l=2, u=1, w=1, d=1, !=1}
>hello
Key: "hello" not cached.
{h=1, e=1, l=2, o=1}
>hello
{h=1, e=1, l=2, o=1}
>bye
Bye!

public static void main(String[] args) throws ExecutionException {
  for (String word : args) {
    System.out.println(CACHE.get(word)); // ...or custom "print" method
  }
}

// limited version:
static final int MAX_ENTRIES = 100;
static final Map<String, Map<Character, Integer>> CACHE = new LinkedHashMap<>(
  MAX_ENTRIES + 1, // initial capacity
  1.0f, // load factor: better 1. than 0.75 (in this setup!?)
  true // "accessOrder" flag
) {
    // eviction: "...This method is invoked by put and putAll after inserting a new entry into the map"
    public boolean removeEldestEntry(Map.Entry eldest) {
        return size() > MAX_ENTRIES;
    }
};

// no limit, no "order", no evict, no outdate:
static final Map<String, Map<Character, Integer>> CACHE = new HashMap<>();

 ... CACHE = Collections.synchronizedMap(new xxxMap...);

static Map<Character, Integer> load(String key) {
  final Map<Character, Integer> result; 
  if (CACHE.containsKey(key)) { // cached!
    result = CACHE.get(key);
    // to "refresh" key, put it again (LRU):
    // CACHE.put(key, result); // here or outside the if-else
  } else { // "expensive" calculation:
    result = analyze(key); // ... and add to cache (unlimited, or removingEldest(imlicitely!!)):
    CACHE.put(key, result);
  }
  return result;
}

public static void main(String[] args) {
  for (String word : args) {
    System.out.println(load(word));
  }
}

-----------------------

<project>
    <!-- only defaults ..., and: -->
    <dependencies>
        <dependency>
            <groupId>com.google.guava</groupId>
            <artifactId>guava</artifactId>
            <version>31.0.1-jre</version>
        </dependency>
    </dependencies>
    <properties>
        <maven.compiler.source>17</maven.compiler.source>
        <maven.compiler.target>17</maven.compiler.target>
    </properties>
</project>

package com.stackoverflow.cache.test;

import com.google.common.cache.CacheBuilder;
import com.google.common.cache.CacheLoader;
import com.google.common.cache.LoadingCache;
import java.util.LinkedHashMap;
import java.util.Scanner;
import java.util.concurrent.ExecutionException;

public class Main {
  
  static final LoadingCache<String, LinkedHashMap<Character, Integer>> CACHE = CacheBuilder.newBuilder()
      .build( // with defaults, and this loader:
          new CacheLoader<String, LinkedHashMap<Character, Integer>>() {
        @Override
        public LinkedHashMap<Character, Integer> load(String key) {
          System.out.format("Key: \"%s\" not cached.%n", key);
          return analyze(key); // invoking "expensive calculation"! 
        }
      });

  public static void main(String[] args) throws ExecutionException {
    try ( Scanner consoleScanner = new Scanner(System.in)) {
      String word = consoleScanner.nextLine().trim(); // line wise! (for word-wise: next())
      while (!"bye".equalsIgnoreCase(word)) {// from Yoda, greetings! https://blog.codinghorror.com/new-programming-jargon/#1 ;)
        System.out.println(CACHE.get(word));// invoke cache, instead of "expensive" calculation!
        word = consoleScanner.nextLine().trim(); // line wise! (for word-wise: next())
      }
      System.out.println("Bye!");
    }
  }

  // basically your charCounter method with single parameter + stream:
  static LinkedHashMap<Character, Integer> analyze(String arg) {
    LinkedHashMap<Character, Integer> elements = new LinkedHashMap();
    arg.chars().forEach((num) -> {
      Character c = (char) num;
      if (elements.containsKey(c)) {
        elements.put(c, elements.get(c) + 1);
      } else {
        elements.put(c, 1);
      }
    });
    return elements;
  }
}

>Java is the best programming language in the world!
Key: "Java is the best programming language in the world!" not cached.
{J=1, a=5, v=1,  =8, i=3, s=2, t=3, h=2, e=4, b=1, p=1, r=3, o=2, g=4, m=2, n=3, l=2, u=1, w=1, d=1, !=1}
>hello
Key: "hello" not cached.
{h=1, e=1, l=2, o=1}
>hello
{h=1, e=1, l=2, o=1}
>bye
Bye!

public static void main(String[] args) throws ExecutionException {
  for (String word : args) {
    System.out.println(CACHE.get(word)); // ...or custom "print" method
  }
}

// limited version:
static final int MAX_ENTRIES = 100;
static final Map<String, Map<Character, Integer>> CACHE = new LinkedHashMap<>(
  MAX_ENTRIES + 1, // initial capacity
  1.0f, // load factor: better 1. than 0.75 (in this setup!?)
  true // "accessOrder" flag
) {
    // eviction: "...This method is invoked by put and putAll after inserting a new entry into the map"
    public boolean removeEldestEntry(Map.Entry eldest) {
        return size() > MAX_ENTRIES;
    }
};

// no limit, no "order", no evict, no outdate:
static final Map<String, Map<Character, Integer>> CACHE = new HashMap<>();

 ... CACHE = Collections.synchronizedMap(new xxxMap...);

static Map<Character, Integer> load(String key) {
  final Map<Character, Integer> result; 
  if (CACHE.containsKey(key)) { // cached!
    result = CACHE.get(key);
    // to "refresh" key, put it again (LRU):
    // CACHE.put(key, result); // here or outside the if-else
  } else { // "expensive" calculation:
    result = analyze(key); // ... and add to cache (unlimited, or removingEldest(imlicitely!!)):
    CACHE.put(key, result);
  }
  return result;
}

public static void main(String[] args) {
  for (String word : args) {
    System.out.println(load(word));
  }
}

-----------------------

<project>
    <!-- only defaults ..., and: -->
    <dependencies>
        <dependency>
            <groupId>com.google.guava</groupId>
            <artifactId>guava</artifactId>
            <version>31.0.1-jre</version>
        </dependency>
    </dependencies>
    <properties>
        <maven.compiler.source>17</maven.compiler.source>
        <maven.compiler.target>17</maven.compiler.target>
    </properties>
</project>

package com.stackoverflow.cache.test;

import com.google.common.cache.CacheBuilder;
import com.google.common.cache.CacheLoader;
import com.google.common.cache.LoadingCache;
import java.util.LinkedHashMap;
import java.util.Scanner;
import java.util.concurrent.ExecutionException;

public class Main {
  
  static final LoadingCache<String, LinkedHashMap<Character, Integer>> CACHE = CacheBuilder.newBuilder()
      .build( // with defaults, and this loader:
          new CacheLoader<String, LinkedHashMap<Character, Integer>>() {
        @Override
        public LinkedHashMap<Character, Integer> load(String key) {
          System.out.format("Key: \"%s\" not cached.%n", key);
          return analyze(key); // invoking "expensive calculation"! 
        }
      });

  public static void main(String[] args) throws ExecutionException {
    try ( Scanner consoleScanner = new Scanner(System.in)) {
      String word = consoleScanner.nextLine().trim(); // line wise! (for word-wise: next())
      while (!"bye".equalsIgnoreCase(word)) {// from Yoda, greetings! https://blog.codinghorror.com/new-programming-jargon/#1 ;)
        System.out.println(CACHE.get(word));// invoke cache, instead of "expensive" calculation!
        word = consoleScanner.nextLine().trim(); // line wise! (for word-wise: next())
      }
      System.out.println("Bye!");
    }
  }

  // basically your charCounter method with single parameter + stream:
  static LinkedHashMap<Character, Integer> analyze(String arg) {
    LinkedHashMap<Character, Integer> elements = new LinkedHashMap();
    arg.chars().forEach((num) -> {
      Character c = (char) num;
      if (elements.containsKey(c)) {
        elements.put(c, elements.get(c) + 1);
      } else {
        elements.put(c, 1);
      }
    });
    return elements;
  }
}

>Java is the best programming language in the world!
Key: "Java is the best programming language in the world!" not cached.
{J=1, a=5, v=1,  =8, i=3, s=2, t=3, h=2, e=4, b=1, p=1, r=3, o=2, g=4, m=2, n=3, l=2, u=1, w=1, d=1, !=1}
>hello
Key: "hello" not cached.
{h=1, e=1, l=2, o=1}
>hello
{h=1, e=1, l=2, o=1}
>bye
Bye!

public static void main(String[] args) throws ExecutionException {
  for (String word : args) {
    System.out.println(CACHE.get(word)); // ...or custom "print" method
  }
}

// limited version:
static final int MAX_ENTRIES = 100;
static final Map<String, Map<Character, Integer>> CACHE = new LinkedHashMap<>(
  MAX_ENTRIES + 1, // initial capacity
  1.0f, // load factor: better 1. than 0.75 (in this setup!?)
  true // "accessOrder" flag
) {
    // eviction: "...This method is invoked by put and putAll after inserting a new entry into the map"
    public boolean removeEldestEntry(Map.Entry eldest) {
        return size() > MAX_ENTRIES;
    }
};

// no limit, no "order", no evict, no outdate:
static final Map<String, Map<Character, Integer>> CACHE = new HashMap<>();

 ... CACHE = Collections.synchronizedMap(new xxxMap...);

static Map<Character, Integer> load(String key) {
  final Map<Character, Integer> result; 
  if (CACHE.containsKey(key)) { // cached!
    result = CACHE.get(key);
    // to "refresh" key, put it again (LRU):
    // CACHE.put(key, result); // here or outside the if-else
  } else { // "expensive" calculation:
    result = analyze(key); // ... and add to cache (unlimited, or removingEldest(imlicitely!!)):
    CACHE.put(key, result);
  }
  return result;
}

public static void main(String[] args) {
  for (String word : args) {
    System.out.println(load(word));
  }
}

-----------------------

<project>
    <!-- only defaults ..., and: -->
    <dependencies>
        <dependency>
            <groupId>com.google.guava</groupId>
            <artifactId>guava</artifactId>
            <version>31.0.1-jre</version>
        </dependency>
    </dependencies>
    <properties>
        <maven.compiler.source>17</maven.compiler.source>
        <maven.compiler.target>17</maven.compiler.target>
    </properties>
</project>

package com.stackoverflow.cache.test;

import com.google.common.cache.CacheBuilder;
import com.google.common.cache.CacheLoader;
import com.google.common.cache.LoadingCache;
import java.util.LinkedHashMap;
import java.util.Scanner;
import java.util.concurrent.ExecutionException;

public class Main {
  
  static final LoadingCache<String, LinkedHashMap<Character, Integer>> CACHE = CacheBuilder.newBuilder()
      .build( // with defaults, and this loader:
          new CacheLoader<String, LinkedHashMap<Character, Integer>>() {
        @Override
        public LinkedHashMap<Character, Integer> load(String key) {
          System.out.format("Key: \"%s\" not cached.%n", key);
          return analyze(key); // invoking "expensive calculation"! 
        }
      });

  public static void main(String[] args) throws ExecutionException {
    try ( Scanner consoleScanner = new Scanner(System.in)) {
      String word = consoleScanner.nextLine().trim(); // line wise! (for word-wise: next())
      while (!"bye".equalsIgnoreCase(word)) {// from Yoda, greetings! https://blog.codinghorror.com/new-programming-jargon/#1 ;)
        System.out.println(CACHE.get(word));// invoke cache, instead of "expensive" calculation!
        word = consoleScanner.nextLine().trim(); // line wise! (for word-wise: next())
      }
      System.out.println("Bye!");
    }
  }

  // basically your charCounter method with single parameter + stream:
  static LinkedHashMap<Character, Integer> analyze(String arg) {
    LinkedHashMap<Character, Integer> elements = new LinkedHashMap();
    arg.chars().forEach((num) -> {
      Character c = (char) num;
      if (elements.containsKey(c)) {
        elements.put(c, elements.get(c) + 1);
      } else {
        elements.put(c, 1);
      }
    });
    return elements;
  }
}

>Java is the best programming language in the world!
Key: "Java is the best programming language in the world!" not cached.
{J=1, a=5, v=1,  =8, i=3, s=2, t=3, h=2, e=4, b=1, p=1, r=3, o=2, g=4, m=2, n=3, l=2, u=1, w=1, d=1, !=1}
>hello
Key: "hello" not cached.
{h=1, e=1, l=2, o=1}
>hello
{h=1, e=1, l=2, o=1}
>bye
Bye!

public static void main(String[] args) throws ExecutionException {
  for (String word : args) {
    System.out.println(CACHE.get(word)); // ...or custom "print" method
  }
}

// limited version:
static final int MAX_ENTRIES = 100;
static final Map<String, Map<Character, Integer>> CACHE = new LinkedHashMap<>(
  MAX_ENTRIES + 1, // initial capacity
  1.0f, // load factor: better 1. than 0.75 (in this setup!?)
  true // "accessOrder" flag
) {
    // eviction: "...This method is invoked by put and putAll after inserting a new entry into the map"
    public boolean removeEldestEntry(Map.Entry eldest) {
        return size() > MAX_ENTRIES;
    }
};

// no limit, no "order", no evict, no outdate:
static final Map<String, Map<Character, Integer>> CACHE = new HashMap<>();

 ... CACHE = Collections.synchronizedMap(new xxxMap...);

static Map<Character, Integer> load(String key) {
  final Map<Character, Integer> result; 
  if (CACHE.containsKey(key)) { // cached!
    result = CACHE.get(key);
    // to "refresh" key, put it again (LRU):
    // CACHE.put(key, result); // here or outside the if-else
  } else { // "expensive" calculation:
    result = analyze(key); // ... and add to cache (unlimited, or removingEldest(imlicitely!!)):
    CACHE.put(key, result);
  }
  return result;
}

public static void main(String[] args) {
  for (String word : args) {
    System.out.println(load(word));
  }
}

-----------------------

<project>
    <!-- only defaults ..., and: -->
    <dependencies>
        <dependency>
            <groupId>com.google.guava</groupId>
            <artifactId>guava</artifactId>
            <version>31.0.1-jre</version>
        </dependency>
    </dependencies>
    <properties>
        <maven.compiler.source>17</maven.compiler.source>
        <maven.compiler.target>17</maven.compiler.target>
    </properties>
</project>

package com.stackoverflow.cache.test;

import com.google.common.cache.CacheBuilder;
import com.google.common.cache.CacheLoader;
import com.google.common.cache.LoadingCache;
import java.util.LinkedHashMap;
import java.util.Scanner;
import java.util.concurrent.ExecutionException;

public class Main {
  
  static final LoadingCache<String, LinkedHashMap<Character, Integer>> CACHE = CacheBuilder.newBuilder()
      .build( // with defaults, and this loader:
          new CacheLoader<String, LinkedHashMap<Character, Integer>>() {
        @Override
        public LinkedHashMap<Character, Integer> load(String key) {
          System.out.format("Key: \"%s\" not cached.%n", key);
          return analyze(key); // invoking "expensive calculation"! 
        }
      });

  public static void main(String[] args) throws ExecutionException {
    try ( Scanner consoleScanner = new Scanner(System.in)) {
      String word = consoleScanner.nextLine().trim(); // line wise! (for word-wise: next())
      while (!"bye".equalsIgnoreCase(word)) {// from Yoda, greetings! https://blog.codinghorror.com/new-programming-jargon/#1 ;)
        System.out.println(CACHE.get(word));// invoke cache, instead of "expensive" calculation!
        word = consoleScanner.nextLine().trim(); // line wise! (for word-wise: next())
      }
      System.out.println("Bye!");
    }
  }

  // basically your charCounter method with single parameter + stream:
  static LinkedHashMap<Character, Integer> analyze(String arg) {
    LinkedHashMap<Character, Integer> elements = new LinkedHashMap();
    arg.chars().forEach((num) -> {
      Character c = (char) num;
      if (elements.containsKey(c)) {
        elements.put(c, elements.get(c) + 1);
      } else {
        elements.put(c, 1);
      }
    });
    return elements;
  }
}

>Java is the best programming language in the world!
Key: "Java is the best programming language in the world!" not cached.
{J=1, a=5, v=1,  =8, i=3, s=2, t=3, h=2, e=4, b=1, p=1, r=3, o=2, g=4, m=2, n=3, l=2, u=1, w=1, d=1, !=1}
>hello
Key: "hello" not cached.
{h=1, e=1, l=2, o=1}
>hello
{h=1, e=1, l=2, o=1}
>bye
Bye!

public static void main(String[] args) throws ExecutionException {
  for (String word : args) {
    System.out.println(CACHE.get(word)); // ...or custom "print" method
  }
}

// limited version:
static final int MAX_ENTRIES = 100;
static final Map<String, Map<Character, Integer>> CACHE = new LinkedHashMap<>(
  MAX_ENTRIES + 1, // initial capacity
  1.0f, // load factor: better 1. than 0.75 (in this setup!?)
  true // "accessOrder" flag
) {
    // eviction: "...This method is invoked by put and putAll after inserting a new entry into the map"
    public boolean removeEldestEntry(Map.Entry eldest) {
        return size() > MAX_ENTRIES;
    }
};

// no limit, no "order", no evict, no outdate:
static final Map<String, Map<Character, Integer>> CACHE = new HashMap<>();

 ... CACHE = Collections.synchronizedMap(new xxxMap...);

static Map<Character, Integer> load(String key) {
  final Map<Character, Integer> result; 
  if (CACHE.containsKey(key)) { // cached!
    result = CACHE.get(key);
    // to "refresh" key, put it again (LRU):
    // CACHE.put(key, result); // here or outside the if-else
  } else { // "expensive" calculation:
    result = analyze(key); // ... and add to cache (unlimited, or removingEldest(imlicitely!!)):
    CACHE.put(key, result);
  }
  return result;
}

public static void main(String[] args) {
  for (String word : args) {
    System.out.println(load(word));
  }
}

-----------------------

<project>
    <!-- only defaults ..., and: -->
    <dependencies>
        <dependency>
            <groupId>com.google.guava</groupId>
            <artifactId>guava</artifactId>
            <version>31.0.1-jre</version>
        </dependency>
    </dependencies>
    <properties>
        <maven.compiler.source>17</maven.compiler.source>
        <maven.compiler.target>17</maven.compiler.target>
    </properties>
</project>

package com.stackoverflow.cache.test;

import com.google.common.cache.CacheBuilder;
import com.google.common.cache.CacheLoader;
import com.google.common.cache.LoadingCache;
import java.util.LinkedHashMap;
import java.util.Scanner;
import java.util.concurrent.ExecutionException;

public class Main {
  
  static final LoadingCache<String, LinkedHashMap<Character, Integer>> CACHE = CacheBuilder.newBuilder()
      .build( // with defaults, and this loader:
          new CacheLoader<String, LinkedHashMap<Character, Integer>>() {
        @Override
        public LinkedHashMap<Character, Integer> load(String key) {
          System.out.format("Key: \"%s\" not cached.%n", key);
          return analyze(key); // invoking "expensive calculation"! 
        }
      });

  public static void main(String[] args) throws ExecutionException {
    try ( Scanner consoleScanner = new Scanner(System.in)) {
      String word = consoleScanner.nextLine().trim(); // line wise! (for word-wise: next())
      while (!"bye".equalsIgnoreCase(word)) {// from Yoda, greetings! https://blog.codinghorror.com/new-programming-jargon/#1 ;)
        System.out.println(CACHE.get(word));// invoke cache, instead of "expensive" calculation!
        word = consoleScanner.nextLine().trim(); // line wise! (for word-wise: next())
      }
      System.out.println("Bye!");
    }
  }

  // basically your charCounter method with single parameter + stream:
  static LinkedHashMap<Character, Integer> analyze(String arg) {
    LinkedHashMap<Character, Integer> elements = new LinkedHashMap();
    arg.chars().forEach((num) -> {
      Character c = (char) num;
      if (elements.containsKey(c)) {
        elements.put(c, elements.get(c) + 1);
      } else {
        elements.put(c, 1);
      }
    });
    return elements;
  }
}

>Java is the best programming language in the world!
Key: "Java is the best programming language in the world!" not cached.
{J=1, a=5, v=1,  =8, i=3, s=2, t=3, h=2, e=4, b=1, p=1, r=3, o=2, g=4, m=2, n=3, l=2, u=1, w=1, d=1, !=1}
>hello
Key: "hello" not cached.
{h=1, e=1, l=2, o=1}
>hello
{h=1, e=1, l=2, o=1}
>bye
Bye!

public static void main(String[] args) throws ExecutionException {
  for (String word : args) {
    System.out.println(CACHE.get(word)); // ...or custom "print" method
  }
}

// limited version:
static final int MAX_ENTRIES = 100;
static final Map<String, Map<Character, Integer>> CACHE = new LinkedHashMap<>(
  MAX_ENTRIES + 1, // initial capacity
  1.0f, // load factor: better 1. than 0.75 (in this setup!?)
  true // "accessOrder" flag
) {
    // eviction: "...This method is invoked by put and putAll after inserting a new entry into the map"
    public boolean removeEldestEntry(Map.Entry eldest) {
        return size() > MAX_ENTRIES;
    }
};

// no limit, no "order", no evict, no outdate:
static final Map<String, Map<Character, Integer>> CACHE = new HashMap<>();

 ... CACHE = Collections.synchronizedMap(new xxxMap...);

static Map<Character, Integer> load(String key) {
  final Map<Character, Integer> result; 
  if (CACHE.containsKey(key)) { // cached!
    result = CACHE.get(key);
    // to "refresh" key, put it again (LRU):
    // CACHE.put(key, result); // here or outside the if-else
  } else { // "expensive" calculation:
    result = analyze(key); // ... and add to cache (unlimited, or removingEldest(imlicitely!!)):
    CACHE.put(key, result);
  }
  return result;
}

public static void main(String[] args) {
  for (String word : args) {
    System.out.println(load(word));
  }
}

-----------------------

<project>
    <!-- only defaults ..., and: -->
    <dependencies>
        <dependency>
            <groupId>com.google.guava</groupId>
            <artifactId>guava</artifactId>
            <version>31.0.1-jre</version>
        </dependency>
    </dependencies>
    <properties>
        <maven.compiler.source>17</maven.compiler.source>
        <maven.compiler.target>17</maven.compiler.target>
    </properties>
</project>

package com.stackoverflow.cache.test;

import com.google.common.cache.CacheBuilder;
import com.google.common.cache.CacheLoader;
import com.google.common.cache.LoadingCache;
import java.util.LinkedHashMap;
import java.util.Scanner;
import java.util.concurrent.ExecutionException;

public class Main {
  
  static final LoadingCache<String, LinkedHashMap<Character, Integer>> CACHE = CacheBuilder.newBuilder()
      .build( // with defaults, and this loader:
          new CacheLoader<String, LinkedHashMap<Character, Integer>>() {
        @Override
        public LinkedHashMap<Character, Integer> load(String key) {
          System.out.format("Key: \"%s\" not cached.%n", key);
          return analyze(key); // invoking "expensive calculation"! 
        }
      });

  public static void main(String[] args) throws ExecutionException {
    try ( Scanner consoleScanner = new Scanner(System.in)) {
      String word = consoleScanner.nextLine().trim(); // line wise! (for word-wise: next())
      while (!"bye".equalsIgnoreCase(word)) {// from Yoda, greetings! https://blog.codinghorror.com/new-programming-jargon/#1 ;)
        System.out.println(CACHE.get(word));// invoke cache, instead of "expensive" calculation!
        word = consoleScanner.nextLine().trim(); // line wise! (for word-wise: next())
      }
      System.out.println("Bye!");
    }
  }

  // basically your charCounter method with single parameter + stream:
  static LinkedHashMap<Character, Integer> analyze(String arg) {
    LinkedHashMap<Character, Integer> elements = new LinkedHashMap();
    arg.chars().forEach((num) -> {
      Character c = (char) num;
      if (elements.containsKey(c)) {
        elements.put(c, elements.get(c) + 1);
      } else {
        elements.put(c, 1);
      }
    });
    return elements;
  }
}

>Java is the best programming language in the world!
Key: "Java is the best programming language in the world!" not cached.
{J=1, a=5, v=1,  =8, i=3, s=2, t=3, h=2, e=4, b=1, p=1, r=3, o=2, g=4, m=2, n=3, l=2, u=1, w=1, d=1, !=1}
>hello
Key: "hello" not cached.
{h=1, e=1, l=2, o=1}
>hello
{h=1, e=1, l=2, o=1}
>bye
Bye!

public static void main(String[] args) throws ExecutionException {
  for (String word : args) {
    System.out.println(CACHE.get(word)); // ...or custom "print" method
  }
}

// limited version:
static final int MAX_ENTRIES = 100;
static final Map<String, Map<Character, Integer>> CACHE = new LinkedHashMap<>(
  MAX_ENTRIES + 1, // initial capacity
  1.0f, // load factor: better 1. than 0.75 (in this setup!?)
  true // "accessOrder" flag
) {
    // eviction: "...This method is invoked by put and putAll after inserting a new entry into the map"
    public boolean removeEldestEntry(Map.Entry eldest) {
        return size() > MAX_ENTRIES;
    }
};

// no limit, no "order", no evict, no outdate:
static final Map<String, Map<Character, Integer>> CACHE = new HashMap<>();

 ... CACHE = Collections.synchronizedMap(new xxxMap...);

static Map<Character, Integer> load(String key) {
  final Map<Character, Integer> result; 
  if (CACHE.containsKey(key)) { // cached!
    result = CACHE.get(key);
    // to "refresh" key, put it again (LRU):
    // CACHE.put(key, result); // here or outside the if-else
  } else { // "expensive" calculation:
    result = analyze(key); // ... and add to cache (unlimited, or removingEldest(imlicitely!!)):
    CACHE.put(key, result);
  }
  return result;
}

public static void main(String[] args) {
  for (String word : args) {
    System.out.println(load(word));
  }
}

-----------------------

<project>
    <!-- only defaults ..., and: -->
    <dependencies>
        <dependency>
            <groupId>com.google.guava</groupId>
            <artifactId>guava</artifactId>
            <version>31.0.1-jre</version>
        </dependency>
    </dependencies>
    <properties>
        <maven.compiler.source>17</maven.compiler.source>
        <maven.compiler.target>17</maven.compiler.target>
    </properties>
</project>

package com.stackoverflow.cache.test;

import com.google.common.cache.CacheBuilder;
import com.google.common.cache.CacheLoader;
import com.google.common.cache.LoadingCache;
import java.util.LinkedHashMap;
import java.util.Scanner;
import java.util.concurrent.ExecutionException;

public class Main {
  
  static final LoadingCache<String, LinkedHashMap<Character, Integer>> CACHE = CacheBuilder.newBuilder()
      .build( // with defaults, and this loader:
          new CacheLoader<String, LinkedHashMap<Character, Integer>>() {
        @Override
        public LinkedHashMap<Character, Integer> load(String key) {
          System.out.format("Key: \"%s\" not cached.%n", key);
          return analyze(key); // invoking "expensive calculation"! 
        }
      });

  public static void main(String[] args) throws ExecutionException {
    try ( Scanner consoleScanner = new Scanner(System.in)) {
      String word = consoleScanner.nextLine().trim(); // line wise! (for word-wise: next())
      while (!"bye".equalsIgnoreCase(word)) {// from Yoda, greetings! https://blog.codinghorror.com/new-programming-jargon/#1 ;)
        System.out.println(CACHE.get(word));// invoke cache, instead of "expensive" calculation!
        word = consoleScanner.nextLine().trim(); // line wise! (for word-wise: next())
      }
      System.out.println("Bye!");
    }
  }

  // basically your charCounter method with single parameter + stream:
  static LinkedHashMap<Character, Integer> analyze(String arg) {
    LinkedHashMap<Character, Integer> elements = new LinkedHashMap();
    arg.chars().forEach((num) -> {
      Character c = (char) num;
      if (elements.containsKey(c)) {
        elements.put(c, elements.get(c) + 1);
      } else {
        elements.put(c, 1);
      }
    });
    return elements;
  }
}

>Java is the best programming language in the world!
Key: "Java is the best programming language in the world!" not cached.
{J=1, a=5, v=1,  =8, i=3, s=2, t=3, h=2, e=4, b=1, p=1, r=3, o=2, g=4, m=2, n=3, l=2, u=1, w=1, d=1, !=1}
>hello
Key: "hello" not cached.
{h=1, e=1, l=2, o=1}
>hello
{h=1, e=1, l=2, o=1}
>bye
Bye!

public static void main(String[] args) throws ExecutionException {
  for (String word : args) {
    System.out.println(CACHE.get(word)); // ...or custom "print" method
  }
}

// limited version:
static final int MAX_ENTRIES = 100;
static final Map<String, Map<Character, Integer>> CACHE = new LinkedHashMap<>(
  MAX_ENTRIES + 1, // initial capacity
  1.0f, // load factor: better 1. than 0.75 (in this setup!?)
  true // "accessOrder" flag
) {
    // eviction: "...This method is invoked by put and putAll after inserting a new entry into the map"
    public boolean removeEldestEntry(Map.Entry eldest) {
        return size() > MAX_ENTRIES;
    }
};

// no limit, no "order", no evict, no outdate:
static final Map<String, Map<Character, Integer>> CACHE = new HashMap<>();

 ... CACHE = Collections.synchronizedMap(new xxxMap...);

static Map<Character, Integer> load(String key) {
  final Map<Character, Integer> result; 
  if (CACHE.containsKey(key)) { // cached!
    result = CACHE.get(key);
    // to "refresh" key, put it again (LRU):
    // CACHE.put(key, result); // here or outside the if-else
  } else { // "expensive" calculation:
    result = analyze(key); // ... and add to cache (unlimited, or removingEldest(imlicitely!!)):
    CACHE.put(key, result);
  }
  return result;
}

public static void main(String[] args) {
  for (String word : args) {
    System.out.println(load(word));
  }
}

Launching chrome in headless mode with selenium in Java giving error

Copy

Download

System.setProperty("webdriver.chrome.driver", "src/main/extras/chromedriver.exe");

WebDriverManager.chromedriver().setup();

Exception in thread "Thread-3" java.lang.NullPointerException

-----------------------

System.setProperty("webdriver.chrome.driver", "src/main/extras/chromedriver.exe");

WebDriverManager.chromedriver().setup();

Exception in thread "Thread-3" java.lang.NullPointerException

-----------------------

System.setProperty("webdriver.chrome.driver", "src/main/extras/chromedriver.exe");

WebDriverManager.chromedriver().setup();

Exception in thread "Thread-3" java.lang.NullPointerException

How to import a file from another directory in Kotlin?

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// TODO: replace this dummy task with the task from your Rust project which
//  generates the Kotlin source directory. Make sure that the generated
//  directory (with the Kotlin file(s)) is the task output directory.
val rustTask by tasks.registering(Copy::class) {
    // To test this, I had simply put a Kotlin file into this "somewhere"
    // directory.
    from("somewhere")
    into(temporaryDir)
}

sourceSets {
    main {
        java {
            srcDir(rustTask)
        }
    }
}

tasks {
    compileKotlin {
        dependsOn(rustTask)
    }
}

Abstract database methods must return a @Dao annotated class or interface

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abstract var connectDatabaseDao:ConnectDatabaseDao

abstract fun getConnectDatabaseDao(): ConnectDatabaseDao

-----------------------

abstract var connectDatabaseDao:ConnectDatabaseDao

abstract fun getConnectDatabaseDao(): ConnectDatabaseDao

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QUESTION

Dart Flutter FAILURE: Build failed with an exception. Error

Asked 2022-Mar-23 at 08:45

I took a few steps to publish my app on Play Store. Since making them, I've been getting errors when converting codes to APK.

I did the steps here: https://docs.flutter.dev/deployment/android#configure-signing-in-gradle

Error:

PS C:\Users\emiry\Desktop\KelimeOgren\kelimeogrenmeuygulamasi> flutter build appbundle

 Building with sound null safety 


FAILURE: Build failed with an exception.

Execution failed for task ':app:validateSigningRelease'.
> Keystore file not set for signing config release

* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.

* Get more help at https://help.gradle.org

BU�LD FAILED in 3s
Running Gradle task 'bundleRelease'...                              4,8s
Gradle task bundleRelease failed with exit code 1

key.properties:

storePassword=secure
keyPassword=secure
keyAlias=key
storeFile=/key.jks

android/app/build.gradle:

def localProperties = new Properties()
def localPropertiesFile = rootProject.file('local.properties')
if (localPropertiesFile.exists()) {
    localPropertiesFile.withReader('UTF-8') { reader ->
        localProperties.load(reader)
    }
}

def flutterRoot = localProperties.getProperty('flutter.sdk')
if (flutterRoot == null) {
    throw new GradleException("Flutter SDK not found. Define location with flutter.sdk in the local.properties file.")
}

def flutterVersionCode = localProperties.getProperty('flutter.versionCode')
if (flutterVersionCode == null) {
    flutterVersionCode = '1'
}

def flutterVersionName = localProperties.getProperty('flutter.versionName')
if (flutterVersionName == null) {
    flutterVersionName = '1.0'
}

apply plugin: 'com.android.application'
apply plugin: 'kotlin-android'
apply plugin: 'com.google.gms.google-services'
apply from: "$flutterRoot/packages/flutter_tools/gradle/flutter.gradle"

def keystoreProperties = new Properties()
def keystorePropertiesFile = rootProject.file('key.properties')
if (keystorePropertiesFile.exists()) {
    keystoreProperties.load(new FileInputStream(keystorePropertiesFile))
}

android {
    compileSdkVersion flutter.compileSdkVersion

    compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_8
        targetCompatibility JavaVersion.VERSION_1_8
    }

    kotlinOptions {
        jvmTarget = '1.8'
    }

    sourceSets {
        main.java.srcDirs += 'src/main/kotlin'
    }

    defaultConfig {
        applicationId "com.example.secureAppId"
        minSdkVersion 21
        targetSdkVersion 30
        versionCode flutterVersionCode.toInteger()
        versionName flutterVersionName
        multiDexEnabled true
    }

    signingConfigs {
        release {
            keyAlias keystoreProperties['keyAlias']
            keyPassword keystoreProperties['keyPassword']
            storeFile keystoreProperties['storeFile'] ? file(keystoreProperties['storeFile']) : null
            storePassword keystoreProperties['storePassword']
        }
    }
    buildTypes {
        release {
            signingConfig signingConfigs.release
        }
    }
}

flutter {
    source '../..'
}

dependencies {
    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
    implementation 'com.google.guava:listenablefuture:9999.0-empty-to-avoid-conflict-with-guava'
    implementation "androidx.multidex:multidex:2.0.1"
    implementation 'com.google.firebase:firebase-analytics:19.0.2'
    implementation 'com.google.firebase:firebase-messaging:22.0.0'
    implementation platform("com.google.firebase:firebase-bom:29.2.1")
}

android/build.gradle:

buildscript {
    ext.kotlin_version = '1.5.0'
    repositories {
        google()
        mavenCentral()
    }

    dependencies {
        classpath 'com.android.tools.build:gradle:4.1.0'
        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
        classpath 'com.google.gms:google-services:4.3.10'
    }
}

allprojects {
    repositories {
        google()
        mavenCentral()
    }
}

rootProject.buildDir = '../build'
subprojects {
    project.buildDir = "${rootProject.buildDir}/${project.name}"
}
subprojects {
    project.evaluationDependsOn(':app')
}

task clean(type: Delete) {
    delete rootProject.buildDir
}

I will publish the app on Google Play Store. https://docs.flutter.dev/deployment/android#configure-signing-in-gradle I did the ones in this link.

What is the problem? How can I solve it? Thank you very much in advance for the help.

ANSWER

Answered 2022-Mar-22 at 22:25

Put both key.properties and key.jks files directly to the android folder , not inside src. And, in the key.properties file, do the following:

storePassword=secure
keyPassword=secure
keyAlias=key
storeFile=../key.jks

Source https://stackoverflow.com/questions/71579313

QUESTION

android datastore-preferences: Property delegate must have a 'getValue(Context, KProperty<*>)' method

Asked 2022-Feb-28 at 12:19

I'm writing a jetpack compose android app, I need to store some settings permanently.

I decided to use androidx.datastore:datastore-preferences:1.0.0 library, I have added this to my classpath.

According to the https://developer.android.com/topic/libraries/architecture/datastore descripton I have added this line of code to my kotline file at the top level:

val Context.prefsDataStore: DataStore by preferencesDataStore(name = "settings")

But I get a compile error:

e: ...SettingsViewModel.kt: (13, 50): Property delegate must have a 'getValue(Context, KProperty<*>)' method. None of the following functions is suitable: 
public abstract operator fun getValue(thisRef: Context, property: KProperty<*>): DataStore<Preferences> defined in kotlin.properties.ReadOnlyProperty

How can I use the datastore-preferences?

My build.gradle file:

plugins {
    id 'com.android.application'
    id 'kotlin-android'
    id 'kotlin-kapt'

}

apply plugin: 'dagger.hilt.android.plugin'
apply plugin: 'kotlinx-serialization'


android {
    compileSdk 31

    defaultConfig {
        applicationId "hu.homedashboard.mobile"
        minSdk 22
        targetSdk 31
        versionCode 1
        versionName "1.0"

        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
        vectorDrawables {
            useSupportLibrary true
        }
    }

    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
        }
    }
    compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_8
        targetCompatibility JavaVersion.VERSION_1_8
    }
    kotlinOptions {
        jvmTarget = '1.8'
        useIR = true
    }
    buildFeatures {
        compose true
    }
    composeOptions {
        kotlinCompilerExtensionVersion compose_version
        kotlinCompilerVersion "$kotlinVersion"
    }
    packagingOptions {
        resources {
            excludes += '/META-INF/{AL2.0,LGPL2.1}'
        }
    }
}

dependencies {

    implementation "androidx.activity:activity-compose:1.3.1"
    implementation "androidx.appcompat:appcompat:1.3.1"
    implementation "androidx.datastore:datastore-preferences:1.0.0"
    implementation "androidx.compose.material:material:$compose_version"
    implementation "androidx.compose.ui:ui-tooling-preview:$compose_version"
    implementation "androidx.compose.ui:ui:$compose_version"
    implementation "com.google.accompanist:accompanist-swiperefresh:0.20.3"
    implementation "androidx.core:core-ktx:1.6.0"
    implementation "androidx.lifecycle:lifecycle-livedata-ktx:$lifecycle_version"
    implementation "androidx.lifecycle:lifecycle-runtime-ktx:$lifecycle_version"
    implementation "androidx.lifecycle:lifecycle-runtime-ktx:2.3.1"
    implementation "androidx.lifecycle:lifecycle-viewmodel-compose:$lifecycle_version"
    implementation "androidx.lifecycle:lifecycle-viewmodel-ktx:$lifecycle_version"
    implementation "androidx.navigation:navigation-compose:2.4.0-alpha10"
    implementation "com.google.android.material:material:1.4.0"
    implementation "com.google.dagger:hilt-android:2.40.1"
    implementation "com.jakewharton.retrofit:retrofit2-kotlinx-serialization-converter:0.8.0"
    implementation "com.squareup.retrofit2:retrofit:2.9.0"
    implementation "org.jetbrains.kotlin:kotlin-stdlib:$kotlinVersion"
    implementation "org.jetbrains.kotlinx:kotlinx-serialization-json:1.3.0"
    implementation "org.ocpsoft.prettytime:prettytime:5.0.2.Final"
    implementation 'androidx.hilt:hilt-navigation-compose:1.0.0-alpha03'

    kapt "com.google.dagger:hilt-compiler:2.38.1"
    kapt "com.google.dagger:dagger-android-processor:2.40.1"
    kapt "com.google.guava:guava:31.0.1-android"

    api "com.google.guava:guava:31.0.1-android"

    testImplementation 'junit:junit:4.+'
    androidTestImplementation 'androidx.test.ext:junit:1.1.3'
    androidTestImplementation 'androidx.test.espresso:espresso-core:3.4.0'
    androidTestImplementation "androidx.compose.ui:ui-test-junit4:$compose_version"
    debugImplementation "androidx.compose.ui:ui-tooling:$compose_version"
}

kapt {
    correctErrorTypes true
    javacOptions {
        option("-Xmaxerrs", 500)
    }
}

ANSWER

Answered 2022-Jan-13 at 09:20

I got this error because of an incorrect import:

import java.util.prefs.Preferences

So fix it by

import androidx.datastore.preferences.core.Preferences

val Context.dataStore by preferencesDataStore(name = "settings")

Source https://stackoverflow.com/questions/70659199

QUESTION

android:exported needs to be explicitly specified for <activity>. Apps targeting Android 12 and higher are required to specify

Asked 2022-Feb-23 at 14:13

After upgrading to android 12, the application is not compiling. It shows

"Manifest merger failed with multiple errors, see logs"

Error showing in Merged manifest:

Merging Errors: Error: android:exported needs to be explicitly specified for . Apps targeting Android 12 and higher are required to specify an explicit value for android:exported when the corresponding component has an intent filter defined. See https://developer.android.com/guide/topics/manifest/activity-element#exported for details. main manifest (this file)

I have set all the activity with android:exported="false". But it is still showing this issue.

My manifest file:

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    package="eu.siacs.conversations">

    <uses-sdk tools:overrideLibrary="net.ypresto.androidtranscoder" />

    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
    <uses-permission android:name="android.permission.READ_CONTACTS" />
    <uses-permission android:name="android.permission.READ_PROFILE" />
    <uses-permission
        android:name="android.permission.READ_PHONE_STATE"
        android:maxSdkVersion="22" />
    <uses-permission android:name="android.permission.INTERNET" />
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
    <uses-permission android:name="android.permission.WAKE_LOCK" />
    <uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
    <uses-permission android:name="android.permission.VIBRATE" />
    <uses-permission android:name="android.permission.REQUEST_IGNORE_BATTERY_OPTIMIZATIONS" />
    <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
    <uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
    <uses-permission android:name="android.permission.FOREGROUND_SERVICE" />
    <uses-permission android:name="android.permission.REQUEST_INSTALL_PACKAGES" />

    <uses-feature
        android:name="android.hardware.location"
        android:required="false" />
    <uses-feature
        android:name="android.hardware.location.gps"
        android:required="false" />
    <uses-feature
        android:name="android.hardware.location.network"
        android:required="false" />

    <uses-permission android:name="android.permission.CAMERA" />
    <uses-permission android:name="android.permission.RECORD_AUDIO" />
    <uses-permission android:name="android.permission.BLUETOOTH" />
    <uses-permission android:name="android.permission.MODIFY_AUDIO_SETTINGS" />
    <uses-permission android:name="android.permission.USE_FULL_SCREEN_INTENT" />
    <uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW" />

    <uses-feature
        android:name="android.hardware.camera"
        android:required="false" />
    <uses-feature
        android:name="android.hardware.camera.autofocus"
        android:required="false" />
    <uses-feature
        android:name="android.hardware.microphone"
        android:required="false" />

    <application
        android:name=".Application"
        android:allowBackup="false"
        android:allowClearUserData="true"
        android:appCategory="social"
        android:hardwareAccelerated="true"
        android:icon="@mipmap/ic_app_launch"
        android:label="@string/app_name"
        android:largeHeap="true"
        android:networkSecurityConfig="@xml/network_security_configuration"
        android:requestLegacyExternalStorage="true"
        android:roundIcon="@mipmap/ic_app_launch_round"
        android:theme="@style/ConversationsTheme"
        android:usesCleartextTraffic="true"
        android:windowSoftInputMode="adjustPan|adjustResize"
        tools:replace="android:label"
        tools:targetApi="q">
        <activity
            android:name=".ui.search.GroupSearchActivity"
            android:exported="true" />
        <activity
            android:name=".ui.profileUpdating.FavouritesActivity"
            android:exported="true" />
        <activity
            android:name=".ui.profileUpdating.NameActivity"
            android:exported="true" />
        <activity
            android:name=".ui.CompulsoryUpdateActivity"
            android:exported="true" />
        <activity android:name=".ui.payments.doPayment.DoPaymentActivity"
            android:exported="true" />
        <activity android:name=".ui.individualList.IndividualListActivity"
            android:exported="true" />
        <activity android:name=".ui.payments.setPayment.SetPaymentActivity"
            android:exported="true" />
        <activity android:name=".ui.login.otpActivity.OTPActivity"
            android:exported="true" />
        <activity android:name=".ui.login.loginActivity.LoginActivity"
            android:exported="true" />

        <service android:name=".services.XmppConnectionService" android:exported="true" />

        <receiver android:name=".services.EventReceiver"
            android:exported="true">
            <intent-filter>
                <action android:name="android.intent.action.BOOT_COMPLETED" />
                <action android:name="android.net.conn.CONNECTIVITY_CHANGE" />
                <action android:name="android.intent.action.ACTION_SHUTDOWN" />
                <action android:name="android.media.RINGER_MODE_CHANGED" />
            </intent-filter>
        </receiver>

        <activity
            android:name=".ui.ShareLocationActivity"
            android:label="@string/title_activity_share_location"
            android:exported="true"/>
        <activity
            android:name=".ui.SearchActivity"
            android:label="@string/search_messages"
            android:exported="true" />
        <activity
            android:name=".ui.RecordingActivity"
            android:configChanges="orientation|screenSize"
            android:theme="@style/ConversationsTheme.Dialog"
            android:exported="true" />
        <activity
            android:name=".ui.ShowLocationActivity"
            android:label="@string/title_activity_show_location"
            android:exported="true" />
        <activity
            android:name=".ui.SplashActivity"
            android:theme="@style/SplashTheme"
            android:exported="true">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <activity
            android:name=".ui.ConversationsActivity"
            android:label="@string/app_name"
            android:launchMode="singleTask"
            android:minWidth="300dp"
            android:minHeight="300dp"
            android:exported="true"
            android:windowSoftInputMode="stateHidden" />
        <activity
            android:name=".ui.ScanActivity"
            android:screenOrientation="portrait"
            android:exported="true"
            android:theme="@style/ConversationsTheme.FullScreen"
            android:windowSoftInputMode="stateAlwaysHidden" />
        <activity
            android:name=".ui.UriHandlerActivity"
            android:label="@string/app_name"
            android:exported="true">
            <intent-filter>
                <action android:name="android.intent.action.VIEW" />

                <category android:name="android.intent.category.DEFAULT" />
                <category android:name="android.intent.category.BROWSABLE" />

                <data android:scheme="xmpp" />
            </intent-filter>
            <intent-filter android:autoVerify="true">
                <action android:name="android.intent.action.VIEW" />

                <category android:name="android.intent.category.DEFAULT" />
                <category android:name="android.intent.category.BROWSABLE" />

                <data android:scheme="https" />
                <data android:host="im.app.in" />
                <data android:pathPrefix="/i/" />
                <data android:pathPrefix="/j/" />
            </intent-filter>
            <intent-filter>
                <action android:name="android.intent.action.SENDTO" />

                <category android:name="android.intent.category.DEFAULT" />

                <data android:scheme="imto" />
                <data android:host="jabber" />
            </intent-filter>
        </activity>
        <activity
            android:name=".ui.StartConversationActivity"
            android:label="@string/title_activity_start_conversation"
            android:launchMode="singleTop"
            android:exported="true">
            <intent-filter>
                <action android:name="android.intent.action.VIEW" />
            </intent-filter>
        </activity>
        <activity
            android:name=".ui.SettingsActivity"
            android:label="@string/title_activity_settings"
            android:exported="true">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.NOTIFICATION_PREFERENCES" />
            </intent-filter>
        </activity>
        <activity
            android:name=".ui.ChooseContactActivity"
            android:label="@string/title_activity_choose_contact"
            android:exported="true" />
        <activity
            android:name=".ui.BlocklistActivity"
            android:label="@string/title_activity_block_list"
            android:exported="true"/>
        <activity
            android:name=".ui.ChangePasswordActivity"
            android:label="@string/change_password_on_server"
            android:exported="true"/>
        <activity
            android:name=".ui.ChooseAccountForProfilePictureActivity"
            android:enabled="false"
            android:label="@string/choose_account"
            android:exported="true">
            <intent-filter android:label="@string/set_profile_picture">
                <action android:name="android.intent.action.ATTACH_DATA" />

                <category android:name="android.intent.category.DEFAULT" />

                <data android:mimeType="image/*" />
            </intent-filter>
        </activity>
        <activity
            android:name=".ui.ShareViaAccountActivity"
            android:label="@string/title_activity_share_via_account"
            android:launchMode="singleTop"
            android:exported="true" />
        <activity
            android:name=".ui.EditAccountActivity"
            android:launchMode="singleTop"
            android:exported="true"
            android:windowSoftInputMode="stateHidden|adjustResize" />
        <activity
            android:name=".ui.ConferenceDetailsActivity"
            android:label="@string/action_muc_details"
            android:exported="true"
            android:windowSoftInputMode="stateHidden" />
        <activity
            android:name=".ui.ContactDetailsActivity"
            android:exported="true"
            android:windowSoftInputMode="stateHidden" />
        <activity
            android:name=".ui.PublishProfilePictureActivity"
            android:label="@string/mgmt_account_publish_avatar"
            android:exported="true"
            android:windowSoftInputMode="stateHidden" />
        <activity
            android:name=".ui.PublishGroupChatProfilePictureActivity"
            android:exported="true"
            android:label="@string/group_chat_avatar" />
        <activity
            android:name=".ui.ShareWithActivity"
            android:label="@string/app_name"
            android:launchMode="singleTop"
            android:exported="true">
            <intent-filter>
                <action android:name="android.intent.action.SEND" />
                <action android:name="android.intent.action.SEND_MULTIPLE" />

                <category android:name="android.intent.category.DEFAULT" />

                <data android:mimeType="text/plain" />
            </intent-filter>
            <intent-filter>
                <action android:name="android.intent.action.SEND" />
                <action android:name="android.intent.action.SEND_MULTIPLE" />

                <category android:name="android.intent.category.DEFAULT" />

                <data android:mimeType="*/*" />
            </intent-filter>

            <!-- the value here needs to be the full class name; independent of the configured applicationId -->
            <meta-data
                android:name="android.service.chooser.chooser_target_service"
                android:value="eu.siacs.conversations.services.ContactChooserTargetService" />
        </activity>
        <activity
            android:name=".ui.TrustKeysActivity"
            android:label="@string/trust_omemo_fingerprints"
            android:exported="true"
            android:windowSoftInputMode="stateAlwaysHidden" />
        <activity
            android:name="com.theartofdev.edmodo.cropper.CropImageActivity"
            android:exported="true"
            android:theme="@style/Base.Theme.AppCompat" />
        <activity android:name=".ui.MemorizingActivity"
            android:exported="true" />
        <activity
            android:name=".ui.MediaBrowserActivity"
            android:exported="true"
            android:label="@string/media_browser" />

        <service android:name=".services.ExportBackupService" android:exported="true"/>
        <service android:name=".services.ImportBackupService" android:exported="true"/>
        <service
            android:name=".services.ContactChooserTargetService"
            android:permission="android.permission.BIND_CHOOSER_TARGET_SERVICE"
            android:exported="true">
            <intent-filter>
                <action android:name="android.service.chooser.ChooserTargetService" />
            </intent-filter>
        </service>
        <service android:name=".services.CompulsoryUpdateService" android:exported="true"/>

        <provider
            android:name="androidx.core.content.FileProvider"
            android:authorities="${applicationId}.files"
            android:exported="false"
            android:grantUriPermissions="true">
            <meta-data
                android:name="android.support.FILE_PROVIDER_PATHS"
                android:resource="@xml/file_paths" />
        </provider>
        <provider
            android:name=".services.BarcodeProvider"
            android:authorities="${applicationId}.barcodes"
            android:exported="false"
            android:grantUriPermissions="true" />

        <activity
            android:name=".ui.ShortcutActivity"
            android:label="@string/contact"
            android:exported="true">
            <intent-filter>
                <action android:name="android.intent.action.CREATE_SHORTCUT" />
            </intent-filter>
        </activity>
        <activity
            android:name=".ui.MucUsersActivity"
            android:exported="true"
            android:label="@string/group_chat_members" />
        <activity
            android:name=".ui.ChannelDiscoveryActivity"
            android:exported="true"
            android:label="@string/discover_channels" />
        <activity
            android:name=".ui.RtpSessionActivity"
            android:autoRemoveFromRecents="true"
            android:exported="true"
            android:launchMode="singleInstance"
            android:supportsPictureInPicture="true" />
    </application>

</manifest>

My second manifest file:

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    package="eu.siacs.conversations">

    <application tools:ignore="GoogleAppIndexingWarning">
        <activity
            android:name=".ui.ManageAccountActivity"
            android:label="@string/title_activity_manage_accounts"
            android:launchMode="singleTask"
            android:exported="true"/>
        <activity
            android:name=".ui.MagicCreateActivity"
            android:label="@string/create_new_account"
            android:launchMode="singleTask"
            android:exported="true"/>
        <activity
            android:name=".ui.EasyOnboardingInviteActivity"
            android:label="@string/invite_to_app"
            android:launchMode="singleTask" />
        <activity
            android:name=".ui.ImportBackupActivity"
            android:label="@string/restore_backup"
            android:launchMode="singleTask"
            android:exported="true">
            <intent-filter>
                <action android:name="android.intent.action.VIEW" />
                <category android:name="android.intent.category.DEFAULT" />

                <data android:mimeType="application/vnd.conversations.backup" />
                <data android:scheme="content" />
            </intent-filter>
            <intent-filter>
                <action android:name="android.intent.action.VIEW" />
                <category android:name="android.intent.category.DEFAULT" />

                <data android:mimeType="application/vnd.conversations.backup" />
                <data android:scheme="file" />
            </intent-filter>
            <intent-filter>
                <action android:name="android.intent.action.VIEW" />

                <category android:name="android.intent.category.DEFAULT" />
                <category android:name="android.intent.category.BROWSABLE" />

                <data android:scheme="content" />
                <data android:host="*" />
                <data android:mimeType="*/*" />
                <data android:pathPattern=".*\\.ceb" />
                <data android:pathPattern=".*\\..*\\.ceb" />
                <data android:pathPattern=".*\\..*\\..*\\.ceb" />
                <data android:pathPattern=".*\\..*\\..*\\..*\\.ceb" />
                <data android:pathPattern=".*\\..*\\..*\\..*\\..*\\.ceb" />
                <data android:pathPattern=".*\\..*\\..*\\..*\\..*\\..*\\.ceb" />
                <data android:pathPattern=".*\\..*\\..*\\..*\\..*\\..*\\..*\\.ceb" />
            </intent-filter>
            <intent-filter>
                <action android:name="android.intent.action.VIEW" />

                <category android:name="android.intent.category.DEFAULT" />
                <category android:name="android.intent.category.BROWSABLE" />

                <data android:scheme="file" />
                <data android:host="*" />
                <data android:mimeType="*/*" />
                <data android:pathPattern=".*\\.ceb" />
                <data android:pathPattern=".*\\..*\\.ceb" />
                <data android:pathPattern=".*\\..*\\..*\\.ceb" />
                <data android:pathPattern=".*\\..*\\..*\\..*\\.ceb" />
                <data android:pathPattern=".*\\..*\\..*\\..*\\..*\\.ceb" />
                <data android:pathPattern=".*\\..*\\..*\\..*\\..*\\..*\\.ceb" />
                <data android:pathPattern=".*\\..*\\..*\\..*\\..*\\..*\\..*\\.ceb" />
            </intent-filter>
        </activity>
    </application>
</manifest>

My gradle file:

import com.android.build.OutputFile

// Top-level build file where you can add configuration options common to all
// sub-projects/modules.
buildscript {
    ext.kotlin_version = "1.5.21"
    repositories {
        google()
        mavenCentral()
        maven { url 'https://jitpack.io' }
        gradlePluginPortal()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:4.2.2'
        classpath 'com.google.gms:google-services:4.3.8'
        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
    }
}

apply plugin: 'com.android.application'
apply plugin: 'kotlin-android'
apply plugin: 'kotlin-kapt'
apply plugin: 'com.google.gms.google-services'

repositories {
    google()
    mavenCentral()
    jcenter()
    maven { url 'https://jitpack.io' }
}

configurations {
    conversationsFreeCompatImplementation
}

dependencies {
    implementation 'androidx.viewpager:viewpager:1.0.0'
    implementation 'androidx.constraintlayout:constraintlayout:2.0.4'

    implementation "org.jetbrains.kotlin:kotlin-stdlib:$kotlin_version"

    implementation 'org.sufficientlysecure:openpgp-api:10.0'
    implementation 'com.theartofdev.edmodo:android-image-cropper:2.8.0'
    implementation 'androidx.appcompat:appcompat:1.3.1'
    implementation 'androidx.exifinterface:exifinterface:1.3.2'
    implementation 'androidx.cardview:cardview:1.0.0'
    implementation 'androidx.swiperefreshlayout:swiperefreshlayout:1.1.0'
    implementation 'androidx.emoji:emoji:1.1.0'
    implementation 'com.google.android.material:material:1.4.0'
    conversationsFreeCompatImplementation 'androidx.emoji:emoji-bundled:1.1.0'
    implementation 'org.bouncycastle:bcmail-jdk15on:1.64'
    //zxing stopped supporting Java 7 so we have to stick with 3.3.3
    //https://github.com/zxing/zxing/issues/1170
    implementation 'com.google.zxing:core:3.4.1'
    implementation 'de.measite.minidns:minidns-hla:0.2.4'
    implementation 'me.leolin:ShortcutBadger:1.1.22@aar'
    implementation 'org.whispersystems:signal-protocol-java:2.8.1'
    implementation 'com.makeramen:roundedimageview:2.3.0'
    implementation "com.wefika:flowlayout:0.4.1"
    implementation 'net.ypresto.androidtranscoder:android-transcoder:0.3.0'
    implementation 'org.jxmpp:jxmpp-jid:1.0.1'
    implementation 'org.osmdroid:osmdroid-android:6.1.10'
    implementation 'org.hsluv:hsluv:0.2'
    implementation 'org.conscrypt:conscrypt-android:2.5.2'
    implementation 'me.drakeet.support:toastcompat:1.1.0'
    implementation "com.leinardi.android:speed-dial:3.2.0"

    implementation "com.squareup.retrofit2:retrofit:2.9.0"
    implementation "com.squareup.retrofit2:converter-gson:2.9.0"
    implementation "com.squareup.okhttp3:okhttp:5.0.0-alpha.2"
    implementation 'com.squareup.okhttp3:logging-interceptor:5.0.0-alpha.2'

    implementation 'com.google.guava:guava:30.1.1-android'
    implementation 'org.webrtc:google-webrtc:1.0.32006'

    // Lifecycle Helper
    implementation "androidx.activity:activity-ktx:1.3.0-rc02"
    implementation "androidx.fragment:fragment-ktx:1.3.6"

    //Navigation
    implementation 'androidx.navigation:navigation-fragment-ktx:2.3.5'
    implementation 'androidx.navigation:navigation-ui-ktx:2.3.5'

    //CardView
    implementation "androidx.cardview:cardview:1.0.0"

    //Country Code Picker
    implementation 'com.hbb20:ccp:2.5.3'

    //Firebase
    implementation 'com.google.firebase:firebase-bom:28.3.0'
    implementation 'com.google.firebase:firebase-auth-ktx:21.0.1'
    implementation 'androidx.browser:browser:1.3.0'

    //OTP view
    implementation 'com.github.mukeshsolanki:android-otpview-pinview:2.1.2'

    //Retrofit
    implementation 'com.squareup.retrofit2:retrofit:2.9.0'
    implementation 'com.squareup.retrofit2:converter-gson:2.9.0'

    //Gson
    implementation 'com.google.code.gson:gson:2.8.7'

    //Multidex
    implementation 'androidx.multidex:multidex:2.0.1'

    //Round Image
    implementation 'de.hdodenhof:circleimageview:3.1.0'

    // Button with image and text
    implementation 'com.github.Omega-R:OmegaCenterIconButton:0.0.4@aar'

    //Razor pay
    implementation 'com.razorpay:checkout:1.6.10'

    //Mixpanel Tracking
    implementation 'com.mixpanel.android:mixpanel-android:5.9.1'

    //Loading screen
    implementation 'com.wang.avi:library:2.1.3'

    //Loading
    implementation 'com.wang.avi:library:2.1.3'

    //Form
    implementation 'com.quickbirdstudios:surveykit:1.1.0'
}

ext {
    travisBuild = System.getenv("TRAVIS") == "true"
    preDexEnabled = System.getProperty("pre-dex", "true")
    abiCodes = ['armeabi-v7a': 1, 'x86': 2, 'x86_64': 3, 'arm64-v8a': 4]
}

android {
    compileSdkVersion 31

    defaultConfig {
        minSdkVersion 24
        targetSdkVersion 31
        versionCode 44
        versionName "2.0.4"
        multiDexEnabled = true
        archivesBaseName += "-$versionName"
        applicationId "com.app.app"
        resValue "string", "applicationId", applicationId
        def appName = "app"
        resValue "string", "app_name", appName
        buildConfigField "String", "APP_NAME", "\"$appName\""
    }

    splits {
        abi {
            universalApk true
            enable true
        }
    }

    configurations {
        compile.exclude group: 'org.jetbrains' , module:'annotations'
    }

    dataBinding {
        enabled true
    }

    dexOptions {
        // Skip pre-dexing when running on Travis CI or when disabled via -Dpre-dex=false.
        preDexLibraries = preDexEnabled && !travisBuild
        jumboMode true
    }

    compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_8
        targetCompatibility JavaVersion.VERSION_1_8
    }

    flavorDimensions("mode", "distribution", "emoji")

    productFlavors {

        conversations {
            dimension "mode"
        }
        free {
            dimension "distribution"
            versionNameSuffix "+f"
        }
        compat {
            dimension "emoji"
            versionNameSuffix "c"
        }
    }

    sourceSets {
        conversationsFreeCompat {
            java {
                srcDir 'src/freeCompat/java'
                srcDir 'src/conversationsFree/java'
            }
        }
    }

    buildTypes {
        release {
            shrinkResources true
            minifyEnabled true
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
            versionNameSuffix "r"
        }
        debug {
            shrinkResources true
            minifyEnabled true
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
            versionNameSuffix "d"
        }
    }


    if (new File("signing.properties").exists()) {
        Properties props = new Properties()
        props.load(new FileInputStream(file("signing.properties")))

        signingConfigs {
            release {
                storeFile file(props['keystore'])
                storePassword props['keystore.password']
                keyAlias props['keystore.alias']
                keyPassword props['keystore.password']
            }
        }
        buildTypes.release.signingConfig = signingConfigs.release
    }

    lintOptions {
        disable 'MissingTranslation', 'InvalidPackage','AppCompatResource'
    }

    subprojects {

        afterEvaluate {
            if (getPlugins().hasPlugin('android') ||
                    getPlugins().hasPlugin('android-library')) {

                configure(android.lintOptions) {
                    disable 'AndroidGradlePluginVersion', 'MissingTranslation'
                }
            }

        }
    }

    packagingOptions {
        exclude 'META-INF/BCKEY.DSA'
        exclude 'META-INF/BCKEY.SF'
    }

    android.applicationVariants.all { variant ->
        variant.outputs.each { output ->
            def baseAbiVersionCode = project.ext.abiCodes.get(output.getFilter(OutputFile.ABI))
            if (baseAbiVersionCode != null) {
                output.versionCodeOverride = (100 * variant.versionCode) + baseAbiVersionCode
            }
        }

    }
}

ANSWER

Answered 2021-Aug-04 at 09:18

I'm not sure what you're using to code, but in order to set it in Android Studio, open the manifest of your project and under the "activity" section, put android:exported="true"(or false if that is what you prefer). I have attached an example.

Source https://stackoverflow.com/questions/68554294

QUESTION

Could not resolve com.google.guava:guava:30.1-jre - Gradle project sync failed. Basic functionality will not work properly - in kotlin project

Asked 2022-Feb-14 at 19:47

It was a project that used to work well in the past, but after updating, the following errors appear.

plugins {
    id 'com.android.application'
    id 'kotlin-android'
}

android {
    compileSdkVersion 30
    buildToolsVersion "30.0.3"

    defaultConfig {
        applicationId "com.example.retrofit_test"
        minSdkVersion 21
        targetSdkVersion 30
        versionCode 1
        versionName "1.0"

        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
    }

    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
        }
    }
    compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_8
        targetCompatibility JavaVersion.VERSION_1_8
    }
    kotlinOptions {
        jvmTarget = '1.8'
    }
}

dependencies {

//    implementation 'com.google.guava:guava:30.1.1-jre'
    implementation 'com.google.guava:guava:30.1-jre'

//    implementation 'org.jetbrains.kotlin:kotlin-stdlib:1.5.30-M1'

    implementation 'androidx.core:core-ktx:1.6.0'
    implementation 'androidx.appcompat:appcompat:1.3.1'
    implementation 'com.google.android.material:material:1.4.0'
    implementation 'androidx.constraintlayout:constraintlayout:2.1.0'
    implementation 'androidx.navigation:navigation-fragment-ktx:2.3.5'
    implementation 'androidx.navigation:navigation-ui-ktx:2.3.5'
    implementation 'androidx.lifecycle:lifecycle-livedata-ktx:2.3.1'
    implementation 'androidx.lifecycle:lifecycle-viewmodel-ktx:2.3.1'
    implementation 'androidx.navigation:navigation-fragment-ktx:2.3.5'
    implementation 'androidx.navigation:navigation-ui-ktx:2.3.5'

    implementation 'com.squareup.retrofit2:retrofit:2.9.0'
    implementation 'com.google.code.gson:gson:2.8.7'
    implementation 'com.squareup.retrofit2:converter-gson:2.9.0'
    implementation 'com.squareup.okhttp3:logging-interceptor:4.9.1'

    implementation 'com.github.bumptech.glide:glide:4.12.0'
    implementation 'android.arch.persistence.room:guava:1.1.1'
    annotationProcessor 'com.github.bumptech.glide:compiler:4.11.0'

    testImplementation 'junit:junit:4.13.2'
    androidTestImplementation 'androidx.test.ext:junit:1.1.3'
    androidTestImplementation 'androidx.test.espresso:espresso-core:3.4.0'
}

If we need more source code to check, I will update it.

The error contents are as follows.

A problem occurred configuring root project 'Retrofit_Test'.

   Could not resolve all artifacts for configuration ':classpath'.
   Could not find org.jetbrains.kotlin:kotlin-gradle-plugin:1.5.30.
     Searched in the following locations:
       - https://dl.google.com/dl/android/maven2/org/jetbrains/kotlin/kotlin-gradle-plugin/1.5.30/kotlin-gradle-plugin-1.5.30.pom
     If the artifact you are trying to retrieve can be found in the repository but without metadata in 'Maven POM' format, you need to adjust the 'metadataSources { ... }' of the repository declaration.
     Required by:
         project :
   Could not find org.jetbrains.kotlin:kotlin-stdlib-jdk8:1.4.32.
     Searched in the following locations:
       - https://dl.google.com/dl/android/maven2/org/jetbrains/kotlin/kotlin-stdlib-jdk8/1.4.32/kotlin-stdlib-jdk8-1.4.32.pom
     If the artifact you are trying to retrieve can be found in the repository but without metadata in 'Maven POM' format, you need to adjust the 'metadataSources { ... }' of the repository declaration.
     Required by:
         project : > com.android.tools.build:gradle:7.0.2
         project : > com.android.tools.build:gradle:7.0.2 > com.android.tools:sdk-common:30.0.2
         project : > com.android.tools.build:gradle:7.0.2 > com.android.tools:repository:30.0.2
         project : > com.android.tools.build:gradle:7.0.2 > com.android.tools.build:aaptcompiler:7.0.2
         project : > com.android.tools.build:gradle:7.0.2 > com.android.tools.analytics-library:shared:30.0.2
         project : > com.android.tools.build:gradle:7.0.2 > com.android.tools.lint:lint-model:30.0.2
         project : > com.android.tools.build:gradle:7.0.2 > androidx.databinding:databinding-compiler-common:7.0.2
         project : > com.android.tools.build:gradle:7.0.2 > com.android.tools.utp:android-test-plugin-host-retention-proto:30.0.2
         project : > com.android.tools.build:gradle:7.0.2 > com.android.tools.build:builder:7.0.2
         project : > com.android.tools.build:gradle:7.0.2 > com.android.tools.build:builder-model:7.0.2
         project : > com.android.tools.build:gradle:7.0.2 > com.android.tools.build:gradle-api:7.0.2
         project : > com.android.tools.build:gradle:7.0.2 > com.android.tools:sdk-common:30.0.2 > com.android.tools:common:30.0.2
         project : > com.android.tools.build:gradle:7.0.2 > com.android.tools.build:builder:7.0.2 > com.android.tools.analytics-library:tracker:30.0.2
         project : > com.android.tools.build:gradle:7.0.2 > com.android.tools.build:builder:7.0.2 > com.android.tools.build:manifest-merger:30.0.2
   Could not find org.apache.httpcomponents:httpmime:4.5.6.
     Searched in the following locations:
       - https://dl.google.com/dl/android/maven2/org/apache/httpcomponents/httpmime/4.5.6/httpmime-4.5.6.pom
     If the artifact you are trying to retrieve can be found in the repository but without metadata in 'Maven POM' format, you need to adjust the 'metadataSources { ... }' of the repository declaration.
     Required by:
         project : > com.android.tools.build:gradle:7.0.2
         project : > com.android.tools.build:gradle:7.0.2 > com.android.tools:sdklib:30.0.2
         project : > com.android.tools.build:gradle:7.0.2 > com.android.tools.analytics-library:crash:30.0.2
   Could not find commons-io:commons-io:2.4.
     Searched in the following locations:
       - https://dl.google.com/dl/android/maven2/commons-io/commons-io/2.4/commons-io-2.4.pom
     If the artifact you are trying to retrieve can be found in the repository but without metadata in 'Maven POM' format, you need to adjust the 'metadataSources { ... }' of the repository declaration.
     Required by:
         project : > com.android.tools.build:gradle:7.0.2
         project : > com.android.tools.build:gradle:7.0.2 > androidx.databinding:databinding-compiler-common:7.0.2
   Could not find org.ow2.asm:asm:7.0.
     Searched in the following locations:
       - https://dl.google.com/dl/android/maven2/org/ow2/asm/asm/7.0/asm-7.0.pom
     If the artifact you are trying to retrieve can be found in the repository but without metadata in 'Maven POM' format, you need to adjust the 'metadataSources { ... }' of the repository declaration.
     Required by:
         project : > com.android.tools.build:gradle:7.0.2
         project : > com.android.tools.build:gradle:7.0.2 > com.android.tools.build:builder:7.0.2
         project : > com.android.tools.build:gradle:7.0.2 > com.android.tools.build:gradle-api:7.0.2
   Could not find org.ow2.asm:asm-analysis:7.0.
     Searched in the following locations:
       - https://dl.google.com/dl/android/maven2/org/ow2/asm/asm-analysis/7.0/asm-analysis-7.0.pom
     If the artifact you are trying to retrieve can be found in the repository but without metadata in 'Maven POM' format, you need to adjust the 'metadataSources { ... }' of the repository declaration.
     Required by:
         project : > com.android.tools.build:gradle:7.0.2
   Could not find org.ow2.asm:asm-commons:7.0.
     Searched in the following locations:
       - https://dl.google.com/dl/android/maven2/org/ow2/asm/asm-commons/7.0/asm-commons-7.0.pom
     If the artifact you are trying to retrieve can be found in the repository but without metadata in 'Maven POM' format, you need to adjust the 'metadataSources { ... }' of the repository declaration.
     Required by:
         project : > com.android.tools.build:gradle:7.0.2
         project : > com.android.tools.build:gradle:7.0.2 > com.android.tools.build:builder:7.0.2
   Could not find org.ow2.asm:asm-util:7.0.
     Searched in the following locations:
       - https://dl.google.com/dl/android/maven2/org/ow2/asm/asm-util/7.0/asm-util-7.0.pom
     If the artifact you are trying to retrieve can be found in the repository but without metadata in 'Maven POM' format, you need to adjust the 'metadataSources { ... }' of the repository declaration.
     Required by:
         project : > com.android.tools.build:gradle:7.0.2
         project : > com.android.tools.build:gradle:7.0.2 > com.android.tools.build:builder:7.0.2
   Could not find org.bouncycastle:bcpkix-jdk15on:1.56.
     Searched in the following locations:
       - https://dl.google.com/dl/android/maven2/org/bouncycastle/bcpkix-jdk15on/1.56/bcpkix-jdk15on-1.56.pom
     If the artifact you are trying to retrieve can be found in the repository but without metadata in 'Maven POM' format, you need to adjust the 'metadataSources { ... }' of the repository declaration.
     Required by:
         project : > com.android.tools.build:gradle:7.0.2
         project : > com.android.tools.build:gradle:7.0.2 > com.android.tools:sdk-common:30.0.2
         project : > com.android.tools.build:gradle:7.0.2 > com.android.tools.build:builder:7.0.2
         project : > com.android.tools.build:gradle:7.0.2 > com.android.tools.build:builder:7.0.2 > com.android.tools.build:apkzlib:7.0.2
   Could not find org.glassfish.jaxb:jaxb-runtime:2.3.2.
     Searched in the following locations:
       - https://dl.google.com/dl/android/maven2/org/glassfish/jaxb/jaxb-runtime/2.3.2/jaxb-runtime-2.3.2.pom
     If the artifact you are trying to retrieve can be found in the repository but without metadata in 'Maven POM' format, you need to adjust the 'metadataSources { ... }' of the repository declaration.
     Required by:
         project : > com.android.tools.build:gradle:7.0.2
         project : > com.android.tools.build:gradle:7.0.2 > com.android.tools:sdk-common:30.0.2
         project : > com.android.tools.build:gradle:7.0.2 > com.android.tools:sdklib:30.0.2
         project : > com.android.tools.build:gradle:7.0.2 > com.android.tools:repository:30.0.2
         project : > com.android.tools.build:gradle:7.0.2 > androidx.databinding:databinding-compiler-common:7.0.2
   Could not find net.sf.jopt-simple:jopt-simple:4.9.
     Searched in the following locations:
       - https://dl.google.com/dl/android/maven2/net/sf/jopt-simple/jopt-simple/4.9/jopt-simple-4.9.pom
     If the artifact you are trying to retrieve can be found in the repository but without metadata in 'Maven POM' format, you need to adjust the 'metadataSources { ... }' of the repository declaration.
     Required by:
         project : > com.android.tools.build:gradle:7.0.2
         project : > com.android.tools.build:gradle:7.0.2 > com.android.tools.build:builder:7.0.2
   Could not find com.squareup:javapoet:1.10.0.
     Searched in the following locations:
       - https://dl.google.com/dl/android/maven2/com/squareup/javapoet/1.10.0/javapoet-1.10.0.pom
     If the artifact you are trying to retrieve can be found in the repository but without metadata in 'Maven POM' format, you need to adjust the 'metadataSources { ... }' of the repository declaration.
     Required by:
         project : > com.android.tools.build:gradle:7.0.2
         project : > com.android.tools.build:gradle:7.0.2 > androidx.databinding:databinding-compiler-common:7.0.2
   Could not find com.google.protobuf:protobuf-java:3.10.0.
     Searched in the following locations:
       - https://dl.google.com/dl/android/maven2/com/google/protobuf/protobuf-java/3.10.0/protobuf-java-3.10.0.pom
     If the artifact you are trying to retrieve can be found in the repository but without metadata in 'Maven POM' format, you need to adjust the 'metadataSources { ... }' of the repository declaration.
     Required by:
         project : > com.android.tools.build:gradle:7.0.2
         project : > com.android.tools.build:gradle:7.0.2 > com.android.tools:sdk-common:30.0.2
         project : > com.android.tools.build:gradle:7.0.2 > com.android.tools.ddms:ddmlib:30.0.2
         project : > com.android.tools.build:gradle:7.0.2 > com.android.tools.build:aapt2-proto:7.0.2-7396180
         project : > com.android.tools.build:gradle:7.0.2 > com.android.tools.build:aaptcompiler:7.0.2
         project : > com.android.tools.build:gradle:7.0.2 > com.android.tools.utp:android-device-provider-gradle-proto:30.0.2
         project : > com.android.tools.build:gradle:7.0.2 > com.android.tools.utp:android-test-plugin-host-retention-proto:30.0.2
         project : > com.android.tools.build:gradle:7.0.2 > com.android.tools.utp:android-test-plugin-result-listener-gradle-proto:30.0.2
         project : > com.android.tools.build:gradle:7.0.2 > com.android.tools.build:bundletool:1.6.0
         project : > com.android.tools.build:gradle:7.0.2 > com.android.tools.analytics-library:shared:30.0.2 > com.android.tools.analytics-library:protos:30.0.2
         project : > com.android.tools.build:gradle:7.0.2 > com.android.tools.build:builder:7.0.2 > com.android.tools.analytics-library:tracker:30.0.2
   Could not find com.google.protobuf:protobuf-java-util:3.10.0.
     Searched in the following locations:
       - https://dl.google.com/dl/android/maven2/com/google/protobuf/protobuf-java-util/3.10.0/protobuf-java-util-3.10.0.pom
     If the artifact you are trying to retrieve can be found in the repository but without metadata in 'Maven POM' format, you need to adjust the 'metadataSources { ... }' of the repository declaration.
     Required by:
         project : > com.android.tools.build:gradle:7.0.2
         project : > com.android.tools.build:gradle:7.0.2 > com.android.tools.build:bundletool:1.6.0
   Could not find com.google.code.gson:gson:2.8.6.
     Searched in the following locations:
       - https://dl.google.com/dl/android/maven2/com/google/code/gson/gson/2.8.6/gson-2.8.6.pom
     If the artifact you are trying to retrieve can be found in the repository but without metadata in 'Maven POM' format, you need to adjust the 'metadataSources { ... }' of the repository declaration.
     Required by:
         project : > com.android.tools.build:gradle:7.0.2
         project : > com.android.tools.build:gradle:7.0.2 > com.android.tools:sdk-common:30.0.2
         project : > com.android.tools.build:gradle:7.0.2 > com.android.tools:sdklib:30.0.2
         project : > com.android.tools.build:gradle:7.0.2 > com.android.tools.analytics-library:shared:30.0.2
         project : > com.android.tools.build:gradle:7.0.2 > androidx.databinding:databinding-compiler-common:7.0.2
         project : > com.android.tools.build:gradle:7.0.2 > com.android.tools.utp:android-test-plugin-result-listener-gradle-proto:30.0.2
         project : > com.android.tools.build:gradle:7.0.2 > com.android.tools.build:builder:7.0.2 > com.android.tools.build:manifest-merger:30.0.2
   Could not find io.grpc:grpc-core:1.21.1.
     Searched in the following locations:
       - https://dl.google.com/dl/android/maven2/io/grpc/grpc-core/1.21.1/grpc-core-1.21.1.pom
     If the artifact you are trying to retrieve can be found in the repository but without metadata in 'Maven POM' format, you need to adjust the 'metadataSources { ... }' of the repository declaration.
     Required by:
         project : > com.android.tools.build:gradle:7.0.2
         project : > com.android.tools.build:gradle:7.0.2 > com.android.tools.utp:android-test-plugin-result-listener-gradle-proto:30.0.2
   Could not find io.grpc:grpc-netty:1.21.1.
     Searched in the following locations:
       - https://dl.google.com/dl/android/maven2/io/grpc/grpc-netty/1.21.1/grpc-netty-1.21.1.pom
     If the artifact you are trying to retrieve can be found in the repository but without metadata in 'Maven POM' format, you need to adjust the 'metadataSources { ... }' of the repository declaration.
     Required by:
         project : > com.android.tools.build:gradle:7.0.2
         project : > com.android.tools.build:gradle:7.0.2 > com.android.tools.utp:android-test-plugin-result-listener-gradle-proto:30.0.2
   Could not find io.grpc:grpc-protobuf:1.21.1.
     Searched in the following locations:
       - https://dl.google.com/dl/android/maven2/io/grpc/grpc-protobuf/1.21.1/grpc-protobuf-1.21.1.pom
     If the artifact you are trying to retrieve can be found in the repository but without metadata in 'Maven POM' format, you need to adjust the 'metadataSources { ... }' of the repository declaration.
     Required by:
         project : > com.android.tools.build:gradle:7.0.2
         project : > com.android.tools.build:gradle:7.0.2 > com.android.tools.utp:android-test-plugin-result-listener-gradle-proto:30.0.2
   Could not find io.grpc:grpc-stub:1.21.1.
     Searched in the following locations:
       - https://dl.google.com/dl/android/maven2/io/grpc/grpc-stub/1.21.1/grpc-stub-1.21.1.pom
     If the artifact you are trying to retrieve can be found in the repository but without metadata in 'Maven POM' format, you need to adjust the 'metadataSources { ... }' of the repository declaration.
     Required by:
         project : > com.android.tools.build:gradle:7.0.2
         project : > com.android.tools.build:gradle:7.0.2 > com.android.tools.utp:android-test-plugin-result-listener-gradle-proto:30.0.2
   Could not find com.google.crypto.tink:tink:1.3.0-rc2.
     Searched in the following locations:
       - https://dl.google.com/dl/android/maven2/com/google/crypto/tink/tink/1.3.0-rc2/tink-1.3.0-rc2.pom
     If the artifact you are trying to retrieve can be found in the repository but without metadata in 'Maven POM' format, you need to adjust the 'metadataSources { ... }' of the repository declaration.
     Required by:
         project : > com.android.tools.build:gradle:7.0.2
   Could not find com.google.flatbuffers:flatbuffers-java:1.12.0.
     Searched in the following locations:
       - https://dl.google.com/dl/android/maven2/com/google/flatbuffers/flatbuffers-java/1.12.0/flatbuffers-java-1.12.0.pom
     If the artifact you are trying to retrieve can be found in the repository but without metadata in 'Maven POM' format, you need to adjust the 'metadataSources { ... }' of the repository declaration.
     Required by:
         project : > com.android.tools.build:gradle:7.0.2
   Could not find org.tensorflow:tensorflow-lite-metadata:0.1.0-rc2.
     Searched in the following locations:
       - https://dl.google.com/dl/android/maven2/org/tensorflow/tensorflow-lite-metadata/0.1.0-rc2/tensorflow-lite-metadata-0.1.0-rc2.pom
     If the artifact you are trying to retrieve can be found in the repository but without metadata in 'Maven POM' format, you need to adjust the 'metadataSources { ... }' of the repository declaration.
     Required by:
         project : > com.android.tools.build:gradle:7.0.2
   Could not find org.bouncycastle:bcprov-jdk15on:1.56.
     Searched in the following locations:
       - https://dl.google.com/dl/android/maven2/org/bouncycastle/bcprov-jdk15on/1.56/bcprov-jdk15on-1.56.pom
     If the artifact you are trying to retrieve can be found in the repository but without metadata in 'Maven POM' format, you need to adjust the 'metadataSources { ... }' of the repository declaration.
     Required by:
         project : > com.android.tools.build:gradle:7.0.2 > com.android.tools:sdk-common:30.0.2
         project : > com.android.tools.build:gradle:7.0.2 > com.android.tools.build:builder:7.0.2
         project : > com.android.tools.build:gradle:7.0.2 > com.android.tools.build:builder:7.0.2 > com.android.tools.build:apkzlib:7.0.2
   Could not find com.google.guava:guava:30.1-jre.
     Searched in the following locations:
       - https://dl.google.com/dl/android/maven2/com/google/guava/guava/30.1-jre/guava-30.1-jre.pom
     If the artifact you are trying to retrieve can be found in the repository but without metadata in 'Maven POM' format, you need to adjust the 'metadataSources { ... }' of the repository declaration.
     Required by:
         project : > com.android.tools.build:gradle:7.0.2 > com.android.tools:sdk-common:30.0.2
         project : > com.android.tools.build:gradle:7.0.2 > com.android.tools.build:aaptcompiler:7.0.2
         project : > com.android.tools.build:gradle:7.0.2 > com.android.tools.analytics-library:crash:30.0.2
         project : > com.android.tools.build:gradle:7.0.2 > com.android.tools.analytics-library:shared:30.0.2
         project : > com.android.tools.build:gradle:7.0.2 > androidx.databinding:databinding-compiler-common:7.0.2
         project : > com.android.tools.build:gradle:7.0.2 > com.android.tools.build:builder-test-api:7.0.2
         project : > com.android.tools.build:gradle:7.0.2 > com.android.tools.utp:android-test-plugin-result-listener-gradle-proto:30.0.2
         project : > com.android.tools.build:gradle:7.0.2 > com.android.tools.build:bundletool:1.6.0
         project : > com.android.tools.build:gradle:7.0.2 > com.android.tools.build:gradle-api:7.0.2
         project : > com.android.tools.build:gradle:7.0.2 > com.android.tools:sdk-common:30.0.2 > com.android.tools:common:30.0.2
         project : > com.android.tools.build:gradle:7.0.2 > com.android.tools.build:builder:7.0.2 > com.android.tools.analytics-library:tracker:30.0.2
   Could not find org.jetbrains.kotlin:kotlin-reflect:1.4.32.
     Searched in the following locations:
       - https://dl.google.com/dl/android/maven2/org/jetbrains/kotlin/kotlin-reflect/1.4.32/kotlin-reflect-1.4.32.pom
     If the artifact you are trying to retrieve can be found in the repository but without metadata in 'Maven POM' format, you need to adjust the 'metadataSources { ... }' of the repository declaration.
     Required by:
         project : > com.android.tools.build:gradle:7.0.2 > com.android.tools:sdk-common:30.0.2
   Could not find javax.inject:javax.inject:1.
     Searched in the following locations:
       - https://dl.google.com/dl/android/maven2/javax/inject/javax.inject/1/javax.inject-1.pom
     If the artifact you are trying to retrieve can be found in the repository but without metadata in 'Maven POM' format, you need to adjust the 'metadataSources { ... }' of the repository declaration.
     Required by:
         project : > com.android.tools.build:gradle:7.0.2 > com.android.tools:sdk-common:30.0.2
         project : > com.android.tools.build:gradle:7.0.2 > com.android.tools.build:bundletool:1.6.0
         project : > com.android.tools.build:gradle:7.0.2 > com.android.tools.build:builder:7.0.2
   Could not find net.sf.kxml:kxml2:2.3.0.
     Searched in the following locations:
       - https://dl.google.com/dl/android/maven2/net/sf/kxml/kxml2/2.3.0/kxml2-2.3.0.pom
     If the artifact you are trying to retrieve can be found in the repository but without metadata in 'Maven POM' format, you need to adjust the 'metadataSources { ... }' of the repository declaration.
     Required by:
         project : > com.android.tools.build:gradle:7.0.2 > com.android.tools:sdk-common:30.0.2
         project : > com.android.tools.build:gradle:7.0.2 > com.android.tools.ddms:ddmlib:30.0.2
         project : > com.android.tools.build:gradle:7.0.2 > com.android.tools.lint:lint-model:30.0.2
         project : > com.android.tools.build:gradle:7.0.2 > com.android.tools.layoutlib:layoutlib-api:30.0.2
         project : > com.android.tools.build:gradle:7.0.2 > com.android.tools.build:builder:7.0.2 > com.android.tools.build:manifest-merger:30.0.2
   Could not find org.jetbrains.intellij.deps:trove4j:1.0.20181211.
     Searched in the following locations:
       - https://dl.google.com/dl/android/maven2/org/jetbrains/intellij/deps/trove4j/1.0.20181211/trove4j-1.0.20181211.pom
     If the artifact you are trying to retrieve can be found in the repository but without metadata in 'Maven POM' format, you need to adjust the 'metadataSources { ... }' of the repository declaration.
     Required by:
         project : > com.android.tools.build:gradle:7.0.2 > com.android.tools:sdk-common:30.0.2
   Could not find xerces:xercesImpl:2.12.0.
     Searched in the following locations:
       - https://dl.google.com/dl/android/maven2/xerces/xercesImpl/2.12.0/xercesImpl-2.12.0.pom
     If the artifact you are trying to retrieve can be found in the repository but without metadata in 'Maven POM' format, you need to adjust the 'metadataSources { ... }' of the repository declaration.
     Required by:
         project : > com.android.tools.build:gradle:7.0.2 > com.android.tools:sdk-common:30.0.2
   Could not find org.apache.commons:commons-compress:1.20.
     Searched in the following locations:
       - https://dl.google.com/dl/android/maven2/org/apache/commons/commons-compress/1.20/commons-compress-1.20.pom
     If the artifact you are trying to retrieve can be found in the repository but without metadata in 'Maven POM' format, you need to adjust the 'metadataSources { ... }' of the repository declaration.

ANSWER

Answered 2021-Sep-17 at 11:03

Add mavenCentral() in Build Script

    repositories {
        mavenCentral()
        google()
    }

Source https://stackoverflow.com/questions/69205327

QUESTION

Unable to find out where reflections-maven plugin comes from

Asked 2022-Jan-02 at 13:34

There executes a particular Maven plugin and I struggle to find out where it comes from to either remove or replace it as its compile dependency link is broken. I am talking about org.reflections:reflections-maven:0.9.8 that depends on org.jfrog.jade.plugins.common:jade-plugin-common:1.3.8 which Maven is not able to download from the central repository as the link redirects to OpenMind location and results in 404 (link).

Instead of including such JAR in the project structure, I would rather figure out where is reflections-maven plugin defined as this plugin is discontinued (GitHub) but somehow is executed during the build (mvn clean install).

[INFO] --- reflections-maven:0.9.5:reflections (default) @ my-module ---
[INFO] Reflections took 240 ms to scan 1 urls, producing 35 keys and 128 values 
[INFO] Reflections successfully saved in C:\Dev\my-project\my-parent\my-module\target\classes\META-INF\reflections\my-module-reflections.xml using XmlSerializer

I haven't found where is reflections-maven defined in any of the multi-module project structure or used. Note I use Maven 3.3.9. My attempts:

Skimming through all plugins and dependencies pom.xml of the failing module and all its parents (the module depends on other modules, however, they were all built successfully before the failing one).
mvn dependency:tree -Dverbose doesn't mention any of reflections-maven or jade-plugin-common at all. The command generates over 136k lines, so it was required to save the output into a file and perform the full-text-search. I am afras Maven 3 is the limit here as far as I understand from this comment.
Using depgraph-maven-plugin gave me the very same negative result.
mvn dependency:analyze -DignoreNonCompile gives only an information that the artifacts were resolved and that where it ends. it doesn't really show anything useful.

[INFO] --- reflections-maven:0.9.5:reflections (default) @ my-module ---
[IJ]-1-ARTIFACT_RESOLVING-[IJ]-path=-[IJ]-artifactCoord=org.reflections:reflections-maven:pom:0.9.5-[IJ]-error=
[IJ]-1-ARTIFACT_RESOLVED-[IJ]-path=C:\Users\user\.m2\repository\org\reflections\reflections-maven\0.9.5\reflections-maven-0.9.5.pom-[IJ]-artifactCoord=org.reflections:reflections-maven:pom:0.9.5-[IJ]-error=
[IJ]-1-ARTIFACT_RESOLVING-[IJ]-path=-[IJ]-artifactCoord=org.reflections:reflections-maven:jar:0.9.5-[IJ]-error=
[IJ]-1-ARTIFACT_RESOLVED-[IJ]-path=C:\Users\user\.m2\repository\org\reflections\reflections-maven\0.9.5\reflections-maven-0.9.5.jar-[IJ]-artifactCoord=org.reflections:reflections-maven:jar:0.9.5-[IJ]-error=
[IJ]-1-ARTIFACT_RESOLVING-[IJ]-path=-[IJ]-artifactCoord=org.reflections:reflections:jar:0.9.5-[IJ]-error=
[IJ]-1-ARTIFACT_RESOLVED-[IJ]-path=C:\Users\user\.m2\repository\org\reflections\reflections\0.9.5\reflections-0.9.5.jar-[IJ]-artifactCoord=org.reflections:reflections:jar:0.9.5-[IJ]-error=
[IJ]-1-ARTIFACT_RESOLVING-[IJ]-path=-[IJ]-artifactCoord=com.google.guava:guava:jar:r08-[IJ]-error=
[IJ]-1-ARTIFACT_RESOLVED-[IJ]-path=C:\Users\user\.m2\repository\com\google\guava\guava\r08\guava-r08.jar-[IJ]-artifactCoord=com.google.guava:guava:jar:r08-[IJ]-error=
...
[IJ]-1-ARTIFACT_RESOLVING-[IJ]-path=-[IJ]-artifactCoord=org.jfrog.maven.annomojo:maven-plugin-anno:jar:1.4.0-[IJ]-error=
[IJ]-1-ARTIFACT_RESOLVED-[IJ]-path=C:\Users\user\.m2\repository\org\jfrog\maven\annomojo\maven-plugin-anno\1.4.0\maven-plugin-anno-1.4.0.jar-[IJ]-artifactCoord=org.jfrog.maven.annomojo:maven-plugin-anno:jar:1.4.0-[IJ]-error=
[IJ]-1-ARTIFACT_RESOLVING-[IJ]-path=-[IJ]-artifactCoord=org.jfrog.jade.plugins.common:jade-plugin-common:jar:1.3.8-[IJ]-error=
[IJ]-1-ARTIFACT_RESOLVED-[IJ]-path=C:\Users\user\.m2\repository\org\jfrog\jade\plugins\common\jade-plugin-common\1.3.8\jade-plugin-common-1.3.8.jar-[IJ]-artifactCoord=org.jfrog.jade.plugins.common:jade-plugin-common:jar:1.3.8-[IJ]-error=
...

Checking the artifacts using the reflections-maven from here, however, none of the artifacts mentioned appear in my project as well.

Question: If I don't have such JAR in the local repository, the build fails as the plugin is executed. In that case, how can I find a way any plugin (particularly reflections-maven in my case) is truly imported and executed in the project?

Feel free to ask for more info in the commens. I use IntelliJ Idea, Maven 3.3.9 and Java 7 if it matters.

Solution 1 (didn't work for me): I have tried to run mvn -Dverbose=true -Doutput=./effective-pom.xml help:effective-pom and both the normal and the verbose form of effective-pom displays the same output of reflections-maven plugin with no additional information about its origin. Since the file is rather big, I include a screenshot:

This might be an issue with my Maven 3.3.9 with a custom settings.xml and a specific IntelliJ Idea. I assume the verbose output would lead to the true origin.

Solution 2:

Upon installing Netbeans (I use IntelliJ Idea by default), the Effective tab of the POM editor finally led me to the true origin where the plugin is defined.

Sadly, IntelliJ Idea doesn't provide such navigation through its effective POM and navigating to the origin is virtually impossible without manual clicking through parent POMs.

ANSWER

Answered 2022-Jan-02 at 13:33

With Help:Effective-Pom:

mvn -Dverbose=true -Doutput=./effective-pom.xml help:effective-pom

We can analyze our "effective pom" (Pom#inheritance, Pom#super-Pom).

The verbose flag will also add the source pom (artifact) as a comment to each output line.
output sets an output file. (default: prints to console)

"inter alia" it allows us to locate/override any inherited plugin/dependency/"pom element".

Unfortunately the output generates:

for "trivial" projects "hundreds" lines of pom.
for "non-trivial" (spring-boot-starter), it gets easily into "ten-thousands" (lines of pom).

In intellij we have a "Show effective Pom" command, which basically invokes the mentioned goal and shows the output (in community edition unfortunately!?) without "verbose".

netbeans has a "Effective" tab in its "Pom Editor":

scrolling/cursoring is here also "cumbersome", but we have "full":
"Navigation" (window) support
Text search
Code hints, etc...

(, "Graph" view also very nice...(and unique feature among "maven IDES (that i know)", and it can be installed un-rooted;)!

Update:

So the mojo seems to work as documented:

<verbose> boolean (since:)3.2.0 Output POM input location as comments.

Default value is: false.

User property is: verbose.

For verbose to have an effect, we need to:

<project ...>
 ...
 <build>
   <plugins>
     <artifactId>maven-help-plugin</artifactId>
     <version>3.2.0</version> <!-- or higher! -->
   </plugins>
 </build>
 ...
</project>

... respectively can (without pom modification):

mvn -Dverbose=true -Doutput=./eff.pom.xml \
  org.apache.maven.plugins:maven-help-plugin:3.2.0:effective-pom

Source https://stackoverflow.com/questions/70552208

QUESTION

Java method should cache the results

Asked 2022-Jan-01 at 13:18

I'm learning programming in the language java.

I need to write an application that takes a string and returns the number of unique characters in the string. It is expected that a string with the same character sequence may be passed several times to the method. Since the counting operation can be time-consuming, the method should cache the results, so that when the method is given a string previously encountered

At this stage, my application is already able to count and display characters

public class Main {
    public static void main(String[] args) {
        String[] testArray = new String[]{"Java", "is", "the", "best", "programming",
                "language", "in", "the", "world!"};
        CharCounter charCounter = new CharCounter();
        Print print = new Print();
        print.printArgs(testArray);
        print.print(charCounter.charCounter(testArray));
    }
}

/**
 *  CharCounter should takes a string and returns the number of unique
 *  characters in the string.
 */
public class CharCounter {
    public LinkedHashMap<Character, Integer> charCounter(String[] args) {
        LinkedHashMap<Character, Integer> elements = new LinkedHashMap();
        List<Character> chars = new ArrayList();
        for (char c : stringToCharArray(args)) {
            chars.add(c);
        }
        for (Character element : chars) {
            if (elements.containsKey(element)) {
                elements.put(element, elements.get(element) + 1);
            } else {
                elements.put(element, 1);
            }
        }
        return elements;
    }

    /**
     * stringToCharArray method - convert string array to character array     *
     */
    private char[] stringToCharArray(String[] args) {
        String s = "";
        for (String agr : args) {
            if (s == "") {
                s = agr;
            } else {
                s = s + " " + agr;
            }
        }
        return s.toCharArray();
    }
}

/**
 * The Print class is intended to output the result to the console
 */
public class Print {
    public void print(Map map) {
        Iterator<Map.Entry<Character, Integer>> iterator
                = map.entrySet().iterator();
        while (iterator.hasNext()) {
            Map.Entry<Character, Integer> charCounterEntry = iterator.next();
            System.out.printf("\"%c\" - %d\n", charCounterEntry.getKey(),
                    charCounterEntry.getValue());
        }
    }

    public void printArgs(String[] args) {
        for (String arg : args) {
            System.out.printf("%s ", arg);
        }
        System.out.println();
    }
}

The result of the application

Java is the best programming language in the world! 
"J" - 1
"a" - 5
"v" - 1
" " - 8
"i" - 3
"s" - 2
"t" - 3
"h" - 2
"e" - 4
"b" - 1
"p" - 1
"r" - 3
"o" - 2
"g" - 4
"m" - 2
"n" - 3
"l" - 2
"u" - 1
"w" - 1
"d" - 1
"!" - 1

Now I need to teach my application to cache and check the input data for an already existing result.

I think LoadingCache from Guava will help me

LoadingCache<Key, Graph> graphs = CacheBuilder.newBuilder()
   .maximumSize(1000)
   .expireAfterWrite(10, TimeUnit.MINUTES)
   .removalListener(MY_LISTENER)
   .build(
       new CacheLoader<Key, Graph>() {
         @Override
         public Graph load(Key key) throws AnyException {
           return createExpensiveGraph(key);
         }
       });

Please help me pair my app with LoadingCache.

To all who will respond, thanks a lot!

ANSWER

Answered 2022-Jan-01 at 13:18

Please help me pair my app with LoadingCache.

Merry X-Mas! There you go:

LoadingCache<Key, Graph> applied to our code must be LoadingCache<String[],Map<Character, Integer>> matching the input and output types of our ...
createExpensiveGraph method applied to our case would be charCounter.
To pair up, we would not invoke charCounter(...) directly, but through a (given) cache instance, so: graphs.get(...).

I refactored "little" (simplified String[] to String, removed "half" of your classes, made the main method interactive), this is what came out:

pom.xml:

<project>
    <!-- only defaults ..., and: -->
    <dependencies>
        <dependency>
            <groupId>com.google.guava</groupId>
            <artifactId>guava</artifactId>
            <version>31.0.1-jre</version>
        </dependency>
    </dependencies>
    <properties>
        <maven.compiler.source>17</maven.compiler.source>
        <maven.compiler.target>17</maven.compiler.target>
    </properties>
</project>

Main.java

package com.stackoverflow.cache.test;

import com.google.common.cache.CacheBuilder;
import com.google.common.cache.CacheLoader;
import com.google.common.cache.LoadingCache;
import java.util.LinkedHashMap;
import java.util.Scanner;
import java.util.concurrent.ExecutionException;

public class Main {
  
  static final LoadingCache<String, LinkedHashMap<Character, Integer>> CACHE = CacheBuilder.newBuilder()
      .build( // with defaults, and this loader:
          new CacheLoader<String, LinkedHashMap<Character, Integer>>() {
        @Override
        public LinkedHashMap<Character, Integer> load(String key) {
          System.out.format("Key: \"%s\" not cached.%n", key);
          return analyze(key); // invoking "expensive calculation"! 
        }
      });

  public static void main(String[] args) throws ExecutionException {
    try ( Scanner consoleScanner = new Scanner(System.in)) {
      String word = consoleScanner.nextLine().trim(); // line wise! (for word-wise: next())
      while (!"bye".equalsIgnoreCase(word)) {// from Yoda, greetings! https://blog.codinghorror.com/new-programming-jargon/#1 ;)
        System.out.println(CACHE.get(word));// invoke cache, instead of "expensive" calculation!
        word = consoleScanner.nextLine().trim(); // line wise! (for word-wise: next())
      }
      System.out.println("Bye!");
    }
  }

  // basically your charCounter method with single parameter + stream:
  static LinkedHashMap<Character, Integer> analyze(String arg) {
    LinkedHashMap<Character, Integer> elements = new LinkedHashMap();
    arg.chars().forEach((num) -> {
      Character c = (char) num;
      if (elements.containsKey(c)) {
        elements.put(c, elements.get(c) + 1);
      } else {
        elements.put(c, 1);
      }
    });
    return elements;
  }
}

In- and Output:

>Java is the best programming language in the world!
Key: "Java is the best programming language in the world!" not cached.
{J=1, a=5, v=1,  =8, i=3, s=2, t=3, h=2, e=4, b=1, p=1, r=3, o=2, g=4, m=2, n=3, l=2, u=1, w=1, d=1, !=1}
>hello
Key: "hello" not cached.
{h=1, e=1, l=2, o=1}
>hello
{h=1, e=1, l=2, o=1}
>bye
Bye!

(2nd calculation of "hello" is cached.)

We see: Once identifying/understanding/defining

"key"
"graph" and
"expensive graph operation"

, it is easy to a apply a (guava) cache to a given "operation".

For advanced cache configuration, please refer to CacheBuilder javadoc, for advanced usage to LoadingCache javadoc.

Rather advanced and theoretical but very related to this topic/ use case: Similarity Caching.

To receive "words" from command line arguments, we can use a main() method like this:

public static void main(String[] args) throws ExecutionException {
  for (String word : args) {
    System.out.println(CACHE.get(word)); // ...or custom "print" method
  }
}

To make it completely "without external libs" (i.e. guava)we would (remove/clean up that dependencies,) we would then use it, as outlined in (accepted answer of) Easy, simple to use LRU cache in java :

// limited version:
static final int MAX_ENTRIES = 100;
static final Map<String, Map<Character, Integer>> CACHE = new LinkedHashMap<>(
  MAX_ENTRIES + 1, // initial capacity
  1.0f, // load factor: better 1. than 0.75 (in this setup!?)
  true // "accessOrder" flag
) {
    // eviction: "...This method is invoked by put and putAll after inserting a new entry into the map"
    public boolean removeEldestEntry(Map.Entry eldest) {
        return size() > MAX_ENTRIES;
    }
};

for "unlimited" cache (might be sufficient for tutor;), just:

// no limit, no "order", no evict, no outdate:
static final Map<String, Map<Character, Integer>> CACHE = new HashMap<>();

(For a thread-safe version, we'd have to:)

 ... CACHE = Collections.synchronizedMap(new xxxMap...);

LinkedHashMap javadoc 17

We could wrap our "cache loading" then like:

static Map<Character, Integer> load(String key) {
  final Map<Character, Integer> result; 
  if (CACHE.containsKey(key)) { // cached!
    result = CACHE.get(key);
    // to "refresh" key, put it again (LRU):
    // CACHE.put(key, result); // here or outside the if-else
  } else { // "expensive" calculation:
    result = analyze(key); // ... and add to cache (unlimited, or removingEldest(imlicitely!!)):
    CACHE.put(key, result);
  }
  return result;
}

and main method like:

public static void main(String[] args) {
  for (String word : args) {
    System.out.println(load(word));
  }
}

;)#

Source https://stackoverflow.com/questions/70478158

QUESTION

Launching chrome in headless mode with selenium in Java giving error

Asked 2021-Dec-31 at 13:08

This is my code:

WebDriverManager.chromedriver().setup();
System.setProperty("webdriver.chrome.driver", "src/main/extras/chromedriver.exe");
ChromeOptions options = new ChromeOptions();
options.addArguments("--headless");
WebDriver driver = new ChromeDriver(options);
driver = new ChromeDriver();
driver.get(url);

The last line, getting the URL, is giving this error:

Exception in thread "Thread-3" java.lang.NullPointerException

I wasn't getting this error before I tried to launch the browser in headless mode.

This is my full error message thing:

"D:\Program Files\Amazon Corretto\jdk11.0.11_9\bin\java.exe" "-javaagent:C:\Program Files\JetBrains\IntelliJ IDEA 2021.2\lib\idea_rt.jar=59273:C:\Program Files\JetBrains\IntelliJ IDEA 2021.2\bin" -Dfile.encoding=UTF-8 -classpath C:\Users\jackg\.m2\repository\org\openjfx\javafx-controls\11.0.2\javafx-controls-11.0.2.jar;C:\Users\jackg\.m2\repository\org\openjfx\javafx-graphics\11.0.2\javafx-graphics-11.0.2.jar;C:\Users\jackg\.m2\repository\org\openjfx\javafx-fxml\11.0.2\javafx-fxml-11.0.2.jar;C:\Users\jackg\.m2\repository\org\openjfx\javafx-web\11.0.2\javafx-web-11.0.2.jar;C:\Users\jackg\.m2\repository\org\openjfx\javafx-media\11.0.2\javafx-media-11.0.2.jar;C:\Users\jackg\.m2\repository\org\openjfx\javafx-base\11.0.1\javafx-base-11.0.1.jar;C:\Users\jackg\.m2\repository\org\seleniumhq\selenium\selenium-java\4.1.1\selenium-java-4.1.1.jar;C:\Users\jackg\.m2\repository\com\google\auto\service\auto-service-annotations\1.0.1\auto-service-annotations-1.0.1.jar;C:\Users\jackg\.m2\repository\com\google\auto\service\auto-service\1.0.1\auto-service-1.0.1.jar;C:\Users\jackg\.m2\repository\com\google\auto\auto-common\1.2\auto-common-1.2.jar;C:\Users\jackg\.m2\repository\org\seleniumhq\selenium\selenium-devtools-v85\4.1.1\selenium-devtools-v85-4.1.1.jar;C:\Users\jackg\.m2\repository\org\seleniumhq\selenium\selenium-devtools-v94\4.1.1\selenium-devtools-v94-4.1.1.jar;C:\Users\jackg\.m2\repository\org\seleniumhq\selenium\selenium-devtools-v95\4.1.1\selenium-devtools-v95-4.1.1.jar;C:\Users\jackg\.m2\repository\org\seleniumhq\selenium\selenium-devtools-v96\4.1.1\selenium-devtools-v96-4.1.1.jar;C:\Users\jackg\.m2\repository\org\seleniumhq\selenium\selenium-edge-driver\4.1.1\selenium-edge-driver-4.1.1.jar;C:\Users\jackg\.m2\repository\org\seleniumhq\selenium\selenium-firefox-driver\4.1.1\selenium-firefox-driver-4.1.1.jar;C:\Users\jackg\.m2\repository\org\seleniumhq\selenium\selenium-firefox-xpi-driver\4.1.1\selenium-firefox-xpi-driver-4.1.1.jar;C:\Users\jackg\.m2\repository\org\seleniumhq\selenium\selenium-ie-driver\4.1.1\selenium-ie-driver-4.1.1.jar;C:\Users\jackg\.m2\repository\org\seleniumhq\selenium\selenium-opera-driver\4.1.1\selenium-opera-driver-4.1.1.jar;C:\Users\jackg\.m2\repository\io\netty\netty-codec\4.1.70.Final\netty-codec-4.1.70.Final.jar;C:\Users\jackg\.m2\repository\io\netty\netty-handler\4.1.70.Final\netty-handler-4.1.70.Final.jar;C:\Users\jackg\.m2\repository\io\netty\netty-resolver\4.1.70.Final\netty-resolver-4.1.70.Final.jar;C:\Users\jackg\.m2\repository\io\opentelemetry\opentelemetry-exporter-logging\1.9.1\opentelemetry-exporter-logging-1.9.1.jar;C:\Users\jackg\.m2\repository\io\opentelemetry\opentelemetry-sdk-metrics\1.9.1-alpha\opentelemetry-sdk-metrics-1.9.1-alpha.jar;C:\Users\jackg\.m2\repository\io\opentelemetry\opentelemetry-sdk-logs\1.9.1-alpha\opentelemetry-sdk-logs-1.9.1-alpha.jar;C:\Users\jackg\.m2\repository\io\opentelemetry\opentelemetry-api-metrics\1.9.1-alpha\opentelemetry-api-metrics-1.9.1-alpha.jar;C:\Users\jackg\.m2\repository\org\asynchttpclient\async-http-client-netty-utils\2.12.3\async-http-client-netty-utils-2.12.3.jar;C:\Users\jackg\.m2\repository\io\netty\netty-codec-socks\4.1.60.Final\netty-codec-socks-4.1.60.Final.jar;C:\Users\jackg\.m2\repository\io\netty\netty-handler-proxy\4.1.60.Final\netty-handler-proxy-4.1.60.Final.jar;C:\Users\jackg\.m2\repository\io\netty\netty-transport-native-epoll\4.1.60.Final\netty-transport-native-epoll-4.1.60.Final-linux-x86_64.jar;C:\Users\jackg\.m2\repository\io\netty\netty-transport-native-kqueue\4.1.60.Final\netty-transport-native-kqueue-4.1.60.Final-osx-x86_64.jar;C:\Users\jackg\.m2\repository\org\reactivestreams\reactive-streams\1.0.3\reactive-streams-1.0.3.jar;C:\Users\jackg\.m2\repository\com\typesafe\netty\netty-reactive-streams\2.0.4\netty-reactive-streams-2.0.4.jar;C:\Users\jackg\.m2\repository\com\sun\activation\jakarta.activation\1.2.2\jakarta.activation-1.2.2.jar;C:\Users\jackg\.m2\repository\org\seleniumhq\selenium\selenium-safari-driver\4.1.1\selenium-safari-driver-4.1.1.jar;C:\Users\jackg\.m2\repository\org\slf4j\slf4j-api\1.7.32\slf4j-api-1.7.32.jar;C:\Users\jackg\.m2\repository\com\google\code\gson\gson\2.8.8\gson-2.8.8.jar;C:\Users\jackg\.m2\repository\org\jsoup\jsoup\1.14.2\jsoup-1.14.2.jar;C:\Users\jackg\.m2\repository\com\github\docker-java\docker-java\3.2.12\docker-java-3.2.12.jar;C:\Users\jackg\.m2\repository\com\github\docker-java\docker-java-core\3.2.12\docker-java-core-3.2.12.jar;C:\Users\jackg\.m2\repository\com\github\docker-java\docker-java-api\3.2.12\docker-java-api-3.2.12.jar;C:\Users\jackg\.m2\repository\com\fasterxml\jackson\core\jackson-annotations\2.10.3\jackson-annotations-2.10.3.jar;C:\Users\jackg\.m2\repository\commons-io\commons-io\2.6\commons-io-2.6.jar;C:\Users\jackg\.m2\repository\org\apache\commons\commons-compress\1.21\commons-compress-1.21.jar;C:\Users\jackg\.m2\repository\commons-lang\commons-lang\2.6\commons-lang-2.6.jar;C:\Users\jackg\.m2\repository\com\fasterxml\jackson\core\jackson-databind\2.10.3\jackson-databind-2.10.3.jar;C:\Users\jackg\.m2\repository\com\fasterxml\jackson\core\jackson-core\2.10.3\jackson-core-2.10.3.jar;C:\Users\jackg\.m2\repository\org\bouncycastle\bcpkix-jdk15on\1.64\bcpkix-jdk15on-1.64.jar;C:\Users\jackg\.m2\repository\org\bouncycastle\bcprov-jdk15on\1.64\bcprov-jdk15on-1.64.jar;C:\Users\jackg\.m2\repository\org\slf4j\jcl-over-slf4j\1.7.30\jcl-over-slf4j-1.7.30.jar;C:\Users\jackg\.m2\repository\com\github\docker-java\docker-java-transport-httpclient5\3.2.12\docker-java-transport-httpclient5-3.2.12.jar;C:\Users\jackg\.m2\repository\com\github\docker-java\docker-java-transport\3.2.12\docker-java-transport-3.2.12.jar;C:\Users\jackg\.m2\repository\org\apache\httpcomponents\client5\httpclient5\5.0.3\httpclient5-5.0.3.jar;C:\Users\jackg\.m2\repository\org\apache\httpcomponents\core5\httpcore5\5.0.2\httpcore5-5.0.2.jar;C:\Users\jackg\.m2\repository\commons-codec\commons-codec\1.13\commons-codec-1.13.jar;C:\Users\jackg\.m2\repository\com\google\guava\failureaccess\1.0.1\failureaccess-1.0.1.jar;C:\Users\jackg\.m2\repository\com\google\guava\listenablefuture\9999.0-empty-to-avoid-conflict-with-guava\listenablefuture-9999.0-empty-to-avoid-conflict-with-guava.jar;C:\Users\jackg\.m2\repository\com\google\code\findbugs\jsr305\3.0.2\jsr305-3.0.2.jar;C:\Users\jackg\.m2\repository\org\checkerframework\checker-qual\3.8.0\checker-qual-3.8.0.jar;C:\Users\jackg\.m2\repository\com\google\errorprone\error_prone_annotations\2.5.1\error_prone_annotations-2.5.1.jar;C:\Users\jackg\.m2\repository\com\google\j2objc\j2objc-annotations\1.3\j2objc-annotations-1.3.jar;C:\Users\jackg\.m2\repository\org\brotli\dec\0.1.2\dec-0.1.2.jar;C:\Users\jackg\.m2\repository\org\apache\commons\commons-lang3\3.12.0\commons-lang3-3.12.0.jar;C:\Users\jackg\.m2\repository\org\apache\commons\commons-text\1.9\commons-text-1.9.jar;C:\Users\jackg\.m2\repository\commons-beanutils\commons-beanutils\1.9.4\commons-beanutils-1.9.4.jar;C:\Users\jackg\.m2\repository\commons-logging\commons-logging\1.2\commons-logging-1.2.jar;C:\Users\jackg\.m2\repository\commons-collections\commons-collections\3.2.2\commons-collections-3.2.2.jar;C:\Users\jackg\.m2\repository\org\apache\commons\commons-collections4\4.4\commons-collections4-4.4.jar -p "C:\Users\jackg\.m2\repository\org\openjfx\javafx-base\11.0.1\javafx-base-11.0.1-win.jar;C:\Users\jackg\.m2\repository\io\netty\netty-transport-classes-kqueue\4.1.70.Final\netty-transport-classes-kqueue-4.1.70.Final.jar;C:\Users\jackg\.m2\repository\org\controlsfx\controlsfx\11.1.0\controlsfx-11.1.0.jar;C:\Users\jackg\.m2\repository\net\synedra\validatorfx\0.1.13\validatorfx-0.1.13.jar;C:\Users\jackg\.m2\repository\io\opentelemetry\opentelemetry-sdk\1.9.1\opentelemetry-sdk-1.9.1.jar;C:\Users\jackg\.m2\repository\org\openjfx\javafx-graphics\11.0.2\javafx-graphics-11.0.2-win.jar;C:\Users\jackg\.m2\repository\org\openjfx\javafx-fxml\11.0.2\javafx-fxml-11.0.2-win.jar;C:\Users\jackg\.m2\repository\com\beust\jcommander\1.81\jcommander-1.81.jar;C:\Users\jackg\.m2\repository\org\openjfx\javafx-controls\11.0.2\javafx-controls-11.0.2-win.jar;C:\Users\jackg\.m2\repository\org\seleniumhq\selenium\selenium-chromium-driver\4.1.1\selenium-chromium-driver-4.1.1.jar;C:\Users\jackg\.m2\repository\io\netty\netty-transport-classes-epoll\4.1.70.Final\netty-transport-classes-epoll-4.1.70.Final.jar;C:\Users\jackg\.m2\repository\org\seleniumhq\selenium\selenium-api\4.1.1\selenium-api-4.1.1.jar;C:\Users\jackg\.m2\repository\org\seleniumhq\selenium\selenium-json\4.1.1\selenium-json-4.1.1.jar;C:\Users\jackg\.m2\repository\net\java\dev\jna\jna\5.8.0\jna-5.8.0.jar;C:\Users\jackg\.m2\repository\io\opentelemetry\opentelemetry-sdk-extension-autoconfigure-spi\1.9.1\opentelemetry-sdk-extension-autoconfigure-spi-1.9.1.jar;C:\Users\jackg\.m2\repository\net\jodah\failsafe\2.4.4\failsafe-2.4.4.jar;C:\Users\jackg\.m2\repository\io\netty\netty-transport-native-unix-common\4.1.70.Final\netty-transport-native-unix-common-4.1.70.Final.jar;C:\Users\jackg\.m2\repository\io\netty\netty-codec-http\4.1.70.Final\netty-codec-http-4.1.70.Final.jar;C:\Users\jackg\.m2\repository\io\opentelemetry\opentelemetry-sdk-extension-autoconfigure\1.9.1-alpha\opentelemetry-sdk-extension-autoconfigure-1.9.1-alpha.jar;C:\Users\jackg\.m2\repository\net\bytebuddy\byte-buddy\1.12.2\byte-buddy-1.12.2.jar;C:\Users\jackg\.m2\repository\io\netty\netty-buffer\4.1.70.Final\netty-buffer-4.1.70.Final.jar;C:\Users\jackg\.m2\repository\io\github\bonigarcia\webdrivermanager\5.0.3\webdrivermanager-5.0.3.jar;C:\Users\jackg\.m2\repository\io\opentelemetry\opentelemetry-sdk-common\1.9.1\opentelemetry-sdk-common-1.9.1.jar;C:\Users\jackg\.m2\repository\org\apache\commons\commons-exec\1.3\commons-exec-1.3.jar;C:\Users\jackg\.m2\repository\io\netty\netty-common\4.1.70.Final\netty-common-4.1.70.Final.jar;C:\Users\jackg\.m2\repository\org\kordamp\ikonli\ikonli-javafx\12.2.0\ikonli-javafx-12.2.0.jar;C:\Users\jackg\.m2\repository\com\dlsc\formsfx\formsfx-core\11.4.2\formsfx-core-11.4.2.jar;C:\Users\jackg\.m2\repository\io\opentelemetry\opentelemetry-sdk-trace\1.9.1\opentelemetry-sdk-trace-1.9.1.jar;C:\Users\jackg\.m2\repository\io\opentelemetry\opentelemetry-api\1.9.1\opentelemetry-api-1.9.1.jar;C:\Users\jackg\.m2\repository\org\openjfx\javafx-web\11.0.2\javafx-web-11.0.2-win.jar;C:\Users\jackg\.m2\repository\io\opentelemetry\opentelemetry-context\1.9.1\opentelemetry-context-1.9.1.jar;C:\Users\jackg\.m2\repository\com\google\guava\guava\30.1.1-jre\guava-30.1.1-jre.jar;C:\Users\jackg\.m2\repository\org\seleniumhq\selenium\selenium-chrome-driver\4.1.1\selenium-chrome-driver-4.1.1.jar;C:\Users\jackg\.m2\repository\com\opencsv\opencsv\5.5.2\opencsv-5.5.2.jar;C:\Users\jackg\.m2\repository\org\seleniumhq\selenium\selenium-support\4.1.1\selenium-support-4.1.1.jar;C:\Users\jackg\.m2\repository\org\kordamp\bootstrapfx\bootstrapfx-core\0.4.0\bootstrapfx-core-0.4.0.jar;C:\Users\jackg\.m2\repository\org\openjfx\javafx-media\11.0.2\javafx-media-11.0.2-win.jar;C:\Users\jackg\.m2\repository\eu\hansolo\tilesfx\11.48\tilesfx-11.48.jar;C:\Users\jackg\.m2\repository\org\seleniumhq\selenium\selenium-http\4.1.1\selenium-http-4.1.1.jar;C:\Users\jackg\.m2\repository\org\asynchttpclient\async-http-client\2.12.3\async-http-client-2.12.3.jar;C:\Users\jackg\.m2\repository\io\opentelemetry\opentelemetry-semconv\1.9.1-alpha\opentelemetry-semconv-1.9.1-alpha.jar;C:\Users\jackg\.m2\repository\io\ous\jtoml\2.0.0\jtoml-2.0.0.jar;C:\Users\jackg\.m2\repository\org\seleniumhq\selenium\selenium-remote-driver\4.1.1\selenium-remote-driver-4.1.1.jar;C:\Users\jackg\.m2\repository\io\netty\netty-transport\4.1.70.Final\netty-transport-4.1.70.Final.jar;C:\Users\jackg\.m2\repository\org\kordamp\ikonli\ikonli-core\12.2.0\ikonli-core-12.2.0.jar;D:\Users\jackg\Desktop\Java Code\Ethermine Tracker JavaFX\target\classes" -m com.traptricker.etherminetrackerjavafx/com.traptricker.etherminetrackerjavafx.Main
Dec 30, 2021 9:22:25 PM javafx.fxml.FXMLLoader$ValueElement processValue
WARNING: Loading FXML document with JavaFX API of version 17 by JavaFX runtime of version 11.0.1
Starting program...
SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".
SLF4J: Defaulting to no-operation (NOP) logger implementation
SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details.
Starting ChromeDriver 95.0.4638.17 (a9d0719444d4b035e284ed1fce73bf6ccd789df2-refs/branch-heads/4638@{#178}) on port 63013
Only local connections are allowed.
Please see https://chromedriver.chromium.org/security-considerations for suggestions on keeping ChromeDriver safe.
ChromeDriver was started successfully.
[1640917354.440][WARNING]: This version of ChromeDriver has not been tested with Chrome version 96.
Dec 30, 2021 9:22:34 PM org.openqa.selenium.remote.ProtocolHandshake createSession
INFO: Detected dialect: W3C
Dec 30, 2021 9:22:34 PM org.openqa.selenium.devtools.CdpVersionFinder findNearestMatch
INFO: Found exact CDP implementation for version 96
Starting ChromeDriver 95.0.4638.17 (a9d0719444d4b035e284ed1fce73bf6ccd789df2-refs/branch-heads/4638@{#178}) on port 53163
Only local connections are allowed.
Please see https://chromedriver.chromium.org/security-considerations for suggestions on keeping ChromeDriver safe.
ChromeDriver was started successfully.
[1640917356.435][WARNING]: This version of ChromeDriver has not been tested with Chrome version 96.
Dec 30, 2021 9:22:36 PM org.openqa.selenium.remote.ProtocolHandshake createSession
INFO: Detected dialect: W3C
Dec 30, 2021 9:22:36 PM org.openqa.selenium.devtools.CdpVersionFinder findNearestMatch
INFO: Found exact CDP implementation for version 96
Exception in thread "Thread-3" java.lang.NullPointerException
    at com.traptricker.etherminetrackerjavafx/com.traptricker.etherminetrackerjavafx.SeleniumScrapper.setUpWebdriver(SeleniumScrapper.java:31)
    at com.traptricker.etherminetrackerjavafx/com.traptricker.etherminetrackerjavafx.Controller.trackEthermine(Controller.java:54)
    at java.base/java.lang.Thread.run(Thread.java:829)

ANSWER

Answered 2021-Dec-31 at 13:08

You need to take care of a few things here:

You have already download the ChromeDriver and accessing it as:

System.setProperty("webdriver.chrome.driver", "src/main/extras/chromedriver.exe");

Additionally you are also downloading ChromeDriver through WebDriverManager as:

WebDriverManager.chromedriver().setup();

As a result your program have access to multiple instances of ChromeDriver. Hence you see:

Exception in thread "Thread-3" java.lang.NullPointerException

Solution

You need to use only one instance of ChromeDriver either the downloaded version or the one downloaded and accessed through WebDriverManager

Source https://stackoverflow.com/questions/70538475

QUESTION

How to import a file from another directory in Kotlin?

Asked 2021-Dec-25 at 09:08

I have a gradle kotlin project, and I'm generating a kotlin file from a Rust project, so it ends up in a totally different place with no gradle project structure, etc.

How do I import this file into my gradle project?

It has its own package but it's a completely standalone file. This is my gradle file:

rootProject.name = "my_project"
include("app")

It's a desktop project, NOT android.

My build.gradle.kts:

plugins {
    // Apply the org.jetbrains.kotlin.jvm Plugin to add support for Kotlin.
    id("org.jetbrains.kotlin.jvm") version "1.5.31"

    // Apply the application plugin to add support for building a CLI application in Java.
    application
}

repositories {
    // Use Maven Central for resolving dependencies.
    mavenCentral()
}

dependencies {
    // Align versions of all Kotlin components
    implementation(platform("org.jetbrains.kotlin:kotlin-bom"))

    // Use the Kotlin JDK 8 standard library.
    implementation("org.jetbrains.kotlin:kotlin-stdlib-jdk8")

    // This dependency is used by the application.
    implementation("com.google.guava:guava:30.1.1-jre")

    // Use the Kotlin test library.
    testImplementation("org.jetbrains.kotlin:kotlin-test")

    // Use the Kotlin JUnit integration.
    testImplementation("org.jetbrains.kotlin:kotlin-test-junit")
}

application {
    // Define the main class for the application.
    mainClass.set("my_project.ffi.AppKt")
}

ANSWER

Answered 2021-Dec-25 at 09:08

Adding the following code to your build.gradle.kts should do the trick (tested with Gradle 7.3.2):

// TODO: replace this dummy task with the task from your Rust project which
//  generates the Kotlin source directory. Make sure that the generated
//  directory (with the Kotlin file(s)) is the task output directory.
val rustTask by tasks.registering(Copy::class) {
    // To test this, I had simply put a Kotlin file into this "somewhere"
    // directory.
    from("somewhere")
    into(temporaryDir)
}

sourceSets {
    main {
        java {
            srcDir(rustTask)
        }
    }
}

tasks {
    compileKotlin {
        dependsOn(rustTask)
    }
}

So, we’re simply adding the generated sources as an additional source directory to the default SourceSet which is consumed by the compileKotlin task. In addition, we make sure that the sources are generated before compileKotlin runs.

Source https://stackoverflow.com/questions/70415789

QUESTION

Abstract database methods must return a @Dao annotated class or interface

Asked 2021-Dec-14 at 04:32

I think this topic already existed. But, since we have a new version of room database, it will be helpful to me to understand better. So, I am implementing a room database with the version 2.3.0 but I am getting lot of errors:

Type of the parameter must be a class annotated with @Entity or a collection/array of it. kotlin.coroutines.Continuation<? super kotlin.Unit> continuation);
Not sure how to handle insert method's return type. public abstract java.lang.Object insertStudent(@org.jetbrains.annotations.NotNull()
Abstract database methods must return a @Dao annotated class or interface. public abstract void setConnectDatabaseDao(@org.jetbrains.annotations.NotNull()

Like said here, I added ktx extension to support suspendable meethods in Dao. But it's still giving me these errors. Here are my code : app build gradle

plugins {
    id 'com.android.application'
    id 'kotlin-android-extensions'
    id 'kotlin-android'
    //id 'kotlin-parcelize'
}
apply plugin: 'kotlin-kapt'
...
//room data base
    implementation "androidx.room:room-runtime:$room_version"
    annotationProcessor "androidx.room:room-compiler:$room_version"
    implementation "androidx.lifecycle:lifecycle-extensions:2.2.0"
    kapt "androidx.lifecycle:lifecycle-compiler:2.4.0"
    kapt "androidx.room:room-compiler:$room_version"
    implementation "androidx.room:room-ktx:$room_version"

    // optional - RxJava2 support for Room
    implementation "androidx.room:room-rxjava2:$room_version"


    // optional - Guava support for Room, including Optional and ListenableFuture
    implementation "androidx.room:room-guava:$room_version"

    // optional - Test helpers
    testImplementation "androidx.room:room-testing:$room_version"

    // optional - Paging 3 Integration
    implementation "androidx.room:room-paging:2.4.0-rc01"

Database

@Database(entities = [Skill::class, Student::class], version = 1, exportSchema = false)
abstract class ConnectDatabase():RoomDatabase() {

    abstract var connectDatabaseDao:ConnectDatabaseDao
    companion object{
        @Volatile
        var INSTANCE:ConnectDatabase? = null
        fun getInstance(context:Context): ConnectDatabase {
            synchronized(this) {
                var instance = INSTANCE
                if (instance == null) {
                    instance = Room.databaseBuilder(
                        context,
                        ConnectDatabase::class.java,
                        "connect_database"
                    )
                        .fallbackToDestructiveMigration()
                        .build()
                    INSTANCE = instance
                }
                return instance
            }
        }
    }

}

Dao


@Dao
interface ConnectDatabaseDao {
    @Insert(onConflict = OnConflictStrategy.REPLACE)
    suspend fun insertStudent(student: Student)

    @Insert(onConflict = OnConflictStrategy.REPLACE)
    suspend fun insertSkill (skill: Skill)

    @Delete
    suspend fun deleteStudent(student: Student)

    @Delete
    suspend fun deleteSkill(skill: Skill)

    @Query("SELECT * FROM student WHERE id = :id")
    suspend fun getStudent(id:Long):Student?

    @Query("SELECT * FROM skill WHERE id = :id")
    suspend fun getSkill(id:Long):Skill?

    @Query("SELECT * FROM student")
    fun getAllStudent():LiveData<List<Student>?>

    @Query("SELECT * FROM skill")
    fun getAllSkill():LiveData<List<Skill>?>

}

Data class

@Parcelize
@Entity(tableName = "student",
    foreignKeys = arrayOf(
        ForeignKey(entity = Skill::class,
            parentColumns = arrayOf("id"),
            childColumns = arrayOf("id_skill"),
            onDelete = ForeignKey.CASCADE
            )
        )
)
data class Student (
        @PrimaryKey(autoGenerate = true)
        @ColumnInfo(name = "id")
        val id: Long,

        @ColumnInfo(name = "name")
        val name: String,

        @ColumnInfo(name= "email")
        val email: String,

        @ColumnInfo(name = "id_skill")
        val idSkill: Long
        ):Parcelable
@Parcelize
@Entity(tableName = "skill")
data class Skill (
    @PrimaryKey(autoGenerate = true)
    @ColumnInfo(name = "id")
    val id: Long,

    @ColumnInfo(name = "item")
    val item:String
): Parcelable

Do someone knows what create the problem please ?

ANSWER

Answered 2021-Dec-14 at 04:32

One issue is as per the title so :-

abstract var connectDatabaseDao:ConnectDatabaseDao

should instead be

abstract fun getConnectDatabaseDao(): ConnectDatabaseDao

The other issues can be overcome by using SDK 30 and removing the suspend from suspend fun .... and having just fun .... when using 2.3.0.

e.g.

Source https://stackoverflow.com/questions/70342508

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