kotlinx.coroutines | Library support for Kotlin coroutines | Android library

 by   Kotlin Kotlin Version: 1.7.1 License: Apache-2.0

kandi X-RAY | kotlinx.coroutines Summary

kandi X-RAY | kotlinx.coroutines Summary

kotlinx.coroutines is a Kotlin library typically used in Mobile, Android applications. kotlinx.coroutines has no bugs, it has no vulnerabilities, it has a Permissive License and it has medium support. You can download it from GitHub.

Library support for Kotlin coroutines with multiplatform support. This is a companion version for the Kotlin 1.6.0 release.
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            kandi-support Support

              kotlinx.coroutines has a medium active ecosystem.
              It has 12001 star(s) with 1760 fork(s). There are 305 watchers for this library.
              There were 3 major release(s) in the last 12 months.
              There are 236 open issues and 1926 have been closed. On average issues are closed in 241 days. There are 27 open pull requests and 0 closed requests.
              It has a neutral sentiment in the developer community.
              The latest version of kotlinx.coroutines is 1.7.1

            kandi-Quality Quality

              kotlinx.coroutines has 0 bugs and 0 code smells.

            kandi-Security Security

              kotlinx.coroutines has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.
              kotlinx.coroutines code analysis shows 0 unresolved vulnerabilities.
              There are 0 security hotspots that need review.

            kandi-License License

              kotlinx.coroutines 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.

            kandi-Reuse Reuse

              kotlinx.coroutines releases are available to install and integrate.
              Installation instructions are not available. Examples and code snippets are available.
              It has 84501 lines of code, 6540 functions and 983 files.
              It has medium code complexity. Code complexity directly impacts maintainability of the code.

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            Currently covering the most popular Java, JavaScript and Python libraries. See a Sample of kotlinx.coroutines
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            kotlinx.coroutines Key Features

            No Key Features are available at this moment for kotlinx.coroutines.

            kotlinx.coroutines Examples and Code Snippets

            Java-Library dependencies not being imported when jar is depended on
            Javadot img1Lines of Code : 53dot img1License : Strong Copyleft (CC BY-SA 4.0)
            copy iconCopy
            include(":application")
            include(":libraryA")
            include(":libraryB")
            
            plugins {
                application
                kotlin("jvm") version "1.3.61"
            }
            
            dependencies {
                api(project(":libraryA")) // we reference only library, we know n

            Community Discussions

            QUESTION

            Strange kotlin checkNotNullParameter error
            Asked 2022-Apr-12 at 11:53

            we received a crash on Firebase for a kotlin method:

            ...

            ANSWER

            Answered 2022-Apr-12 at 11:53

            Shouldn't the exception be thrown way before getting to the constructor call for DeliveryMethod?

            Within Kotlin, it's not possible for a non-null parameter to be given a null value at runtime accidentally (because the code wouldn't have compiled in the first place). However, this can happen if the value is passed from Java. This is why the Kotlin compiler tries to protect you from Java's null unsafety by generating null-checks at the beginning of some methods (with the intrinsic checkNotNullParameter you're seeing fail here).

            However, there is no point in doing that in private or suspend methods since they can only be called from Kotlin (usually), and it would add some overhead that might not be acceptable in performance-sensitive code. That is why these checks are only generated for non-suspend public/protected/internal methods (because their goal is to prevent misuse from Java).

            This is why, if you manage to call addSingleDMInAd with a null argument, it doesn't fail with this error. That said, it would be interesting to see how you're getting the null here, because usually the checks at the public API surface are enough. Is some reflection or unsafe cast involved here?

            EDIT: with the addition of the calling code, this clears up the problem. You're calling a method that takes a List from Java, with a list that contains nulls. Unfortunately Kotlin only checks the parameters themselves (in this case, it checks that the list itself is not null), it doesn't iterate your list to check for nulls inside. This is why it didn't fail at the public API surface in this case.

            Also, the way your model is setup is quite strange. It seems the lateinit is lying because depending on which constructor is used, the properties may actually not be set at all. It would be safer to mark them as nullable to account for when users of that class don't set the value of these properties. Doing this, you won't even need all secondary constructors, and you can just use default values:

            Source https://stackoverflow.com/questions/71826442

            QUESTION

            Jetpack compose BottomNavigation - java.lang.IllegalStateException: Already attached to lifecycleOwner
            Asked 2022-Apr-04 at 05:49

            When I double click the same item or if I go to each composable screen very quickly i receive an error, How do I solve this problem? I tried changing few things but I just can't solve it and I can't find any resources to fix this problem.

            Bottom Navigation implementation

            ...

            ANSWER

            Answered 2022-Mar-06 at 09:39

            I'm facing the same problem using the latest compose navigation dependency 2.5.0-alpha03.

            I don't know why it's happening.

            Philip Dukhov is right, you should report this issue.

            Here is a dirty workaround :

            Source https://stackoverflow.com/questions/71361999

            QUESTION

            Why does ExceptionInInitializerError occur when invoking HtmlCompat in an Android unit test using Robolectric?
            Asked 2022-Mar-21 at 13:56

            I am attempting to unit test a method that is part of my use case layer of an Android app. The method receives an XML RSS feed and returns it to the view model as GSON-parsed objects. The testing class is annotated with @RunWith(RobolectricTestRunner::class).

            The test fails because a java.lang.ExceptionInInitializerError (among others) is thrown by .fromHtml() within this method of the use case class:

            ...

            ANSWER

            Answered 2022-Mar-21 at 13:56

            I have discovered a solution. Add the following to the android section of the module build.gradle:

            Source https://stackoverflow.com/questions/71542971

            QUESTION

            Why does Android 12 and room-paging now crash
            Asked 2022-Mar-14 at 18:36

            I've updated my android application to target Android S and was made to add

            ...

            ANSWER

            Answered 2021-Oct-20 at 13:35

            The fix was to also increase paging androidx.paging:paging-runtime-ktx to beta01

            Source https://stackoverflow.com/questions/69646809

            QUESTION

            java.lang.NoClassDefFoundError: Failed resolution of: Ljava/lang/Math8 when upgrading Gradle and Android Gradle Plugin
            Asked 2022-Mar-08 at 14:39

            I'm working on an Android app with a Gradle version of 7.1.1 and an Android Gradle Plugin version of 7.0.0. When I upgrade to Gradle version 7.2 and Android Gradle Plugin version 7.1.1, I get the following error.

            ...

            ANSWER

            Answered 2022-Mar-08 at 14:39

            Desugaring effects "a subset of java.time" so upgrading to the latest version of desugar_jdk_libs should fix the issue. At the time of posting, the latest version is 1.1.5.

            References

            Source https://stackoverflow.com/questions/71338792

            QUESTION

            Running async coroutine with Pair return
            Asked 2022-Feb-21 at 09:18

            I'm able to call a function using async when its returning just one value.

            However, if the return is a Pair, I get - Destructuring declaration initializer of type Deferred must have a 'component1()' function

            Am I missing something?

            Here is a sample code:

            ...

            ANSWER

            Answered 2022-Feb-21 at 09:12

            The problem is that you can only destructure the Pair this way, but not the Deferred itself.

            You could first assign the deferred value to a single variable, and later await it so you get a Pair that you can destructure:

            Source https://stackoverflow.com/questions/71201700

            QUESTION

            why is this error on couritunes accouring?
            Asked 2022-Feb-15 at 16:27

            2022-02-15 09:53:53.459 7750-7750/? E/ple.anotadomin: Unknown bits set in runtime_flags: 0x8000 2022-02-15 09:53:57.317 7750-7789/com.example.anotadomina E/AndroidRuntime: FATAL EXCEPTION: DefaultDispatcher-worker-1 Process: com.example.anotadomina, PID: 7750

            Hello there, I'm getting this error while trying to call a fun inside a couritunescope or even global scope, i don't know why, i'm currently on the third day trying to solve the error with google with no luck.

            https://github.com/Carlosktdev/Projects

            ...

            ANSWER

            Answered 2022-Feb-15 at 16:27

            You're indirectly trying to call addObserver on a background thread, while you were supposed to do it on the main thread.

            This is due to accessing your viewModel directly from the background coroutine here (via a viewModels() delegate):

            Source https://stackoverflow.com/questions/71128417

            QUESTION

            Kotlin coroutines within a Spring REST endpoint
            Asked 2022-Feb-14 at 10:11

            Given a REST endpoint and two asynchronous coroutines each returning an integer, I want this endpoint to return their sum. The two functions (funA and funB) should run in parallel, in such a way that the whole computation should take ~3secs. I'm using SpringBoot 2.6.3 and Kotlin Coroutines 1.6.0. Here is my attempt:

            ...

            ANSWER

            Answered 2022-Feb-14 at 10:11

            You really messed this up ;-) There are several problems with your code:

            • Use runBlocking() only to use another runBlocking() inside it.
            • Use async() and immediately call await() on it (in summing()) - it does nothing.
            • funA().await() and funB().await() don't make any sense really. These functions return integers, you can't await() on already acquired integers.
            • Generally, using much more code than needed.

            The solution is pretty simple: use runBlocking() once to jump into coroutine world and then use async() to start both functions concurrently to each other:

            Source https://stackoverflow.com/questions/71107591

            QUESTION

            Maps in Jetpack compose
            Asked 2022-Feb-09 at 06:42

            I'm trying to get a simple map as my mainActivity to test how maps with compose works. Unfortunately I just fail at the beginning with an Errormessage which says basically nothing but "IllegalStateException". I've tried to extract the map code from the original Google example here: https://github.com/android/compose-samples/tree/main/Crane I've tried to rebuild a simple Composable, made an API Key at Google Cloud Platform and added it to my manifest.

            Thats the MainActivity:

            ...

            ANSWER

            Answered 2021-Nov-14 at 18:43

            I don't know if you are reading this, but you have forgotten to include ON_START event for lifecycle, so you are throwing the exception. Also you are calling onStart on ON_CREATE.

            Also consider populating the lifecycleObserver to be scoped into the DisposableEffect and make the DisposableEffect also aware of the mapView (give it as an argument).

            Source https://stackoverflow.com/questions/69540044

            QUESTION

            Why can I cancel a Flow without either invoking yield or determining isActive() identification in Kotlin?
            Asked 2022-Feb-03 at 03:25

            I have read the article.

            There are two approaches to making computation code cancellable. The first one is to periodically invoke a suspending function that checks for cancellation. There is a yield function that is a good choice for that purpose. The other one is to explicitly check the cancellation status.

            I know Flow is suspending functions.

            I run Code B , and get Result B as I expected.

            I think I can't making computation Code A cancellable, but in fact I can click "Stop" button to cancel Flow after I click "Start" button to emit Flow, why?

            Code A

            ...

            ANSWER

            Answered 2022-Feb-02 at 13:37

            It has to do with CoroutineScopes and children of coroutines. When a parent coroutine is canceled, all its children are canceled as well.

            More here: https://kotlinlang.org/docs/coroutine-context-and-dispatchers.html#children-of-a-coroutine

            Source https://stackoverflow.com/questions/70956455

            Community Discussions, Code Snippets contain sources that include Stack Exchange Network

            Vulnerabilities

            No vulnerabilities reported

            Install kotlinx.coroutines

            You can download it from GitHub.

            Support

            Presentations and videos: Introduction to Coroutines (Roman Elizarov at KotlinConf 2017, slides) Deep dive into Coroutines (Roman Elizarov at KotlinConf 2017, slides) Kotlin Coroutines in Practice (Roman Elizarov at KotlinConf 2018, slides)Guides and manuals: Guide to kotlinx.coroutines by example (read it first) Guide to UI programming with coroutines Debugging capabilities in kotlinx.coroutinesCompatibility policy and experimental annotationsChange log for kotlinx.coroutinesCoroutines design document (KEEP)Full kotlinx.coroutines API reference
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