Android-RecyclerView | demo demonstrates the common functions | RecyclerView library
kandi X-RAY | Android-RecyclerView Summary
kandi X-RAY | Android-RecyclerView Summary
This demo demonstrates the common functions of RecyclerView
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Top functions reviewed by kandi - BETA
- set recyclerView
- On click handler .
- Draws the divider over the parent .
- On bind view holder .
- Draws a divider on a canvas .
- Draws a divider on a RecyclerView .
- Displays a short message .
- On createViewHolder
- Displays a long value .
- Gets the avatar .
Android-RecyclerView Key Features
Android-RecyclerView Examples and Code Snippets
Community Discussions
Trending Discussions on Android-RecyclerView
QUESTION
I am trying to handle imbalanced multi label dataset
using cross validation
but scikit learn cross_val_score
is returning nan list of values
on running classifier.
Here is the code:
ANSWER
Answered 2020-Nov-20 at 01:58I think you need to change the model inside the line of the scores:
QUESTION
logcat 2020-11-05 22:49:22.581 1663-1663/? W/ContextImpl: Calling a method in the system process without a qualified user: android.app.ContextImpl.sendBroadcast:1025 com.android.server.location.OppoSuplController.sendSuplConfigUpdateBroadcast:293 com.android.server.location.OppoSuplController.updateSuplConfig:274 com.android.server.location.OppoSuplController.access$1300:47 com.android.server.location.OppoSuplController$2.handleMessage:619 2020-11-05 22:49:22.582 1663-1663/? D/OppoSuplController: mSuplHostName : supl.google.com, mSuplHostPort : 7275, mSuplMode : 3, mMsaEnabled : true, mMsbEnabled : true, mSpecHostEnabled : true, mHostSwitchEnabled : true, mTelephonyImsi : 40494 2020-11-05 22:49:22.620 2935-2935/? D/CdmaVolteServiceChecker: onReceive, action = android.intent.action.SERVICE_STATE 2020-11-05 22:49:22.620 2935-2935/? D/CdmaVolteServiceChecker: updateState, checking = false 2020-11-05 22:49:22.620 2935-2935/? D/CdmaVolteServiceChecker: shouldShowVolteAlert cdma mixed volte support, return false. 2020-11-05 22:49:22.844 1663-3532/? E/Process: get_ion_cache_memory: Unable to open /d/ion/heaps/system 2020-11-05 22:49:22.980 1663-4211/? E/Process: get_ion_cache_memory: Unable to open /d/ion/heaps/system 2020-11-05 22:49:25.681 22324-22457/? E/Parcel: Reading a NULL string not supported here. 2020-11-05 22:49:27.649 1173-1382/? E/storaged: getDiskStats failed with result NOT_SUPPORTED and size 0 2020-11-05 22:49:28.068 1663-1663/? D/BatteryService: send broadcast : oppo.intent.action.BATTERY_DATA_UPDATE 2020-11-05 22:49:28.069 1663-1663/? W/ContextImpl: Calling a method in the system process without a qualified user: android.app.ContextImpl.sendBroadcast:1025 com.android.server.BatteryService$8.run:803 android.os.Handler.handleCallback:873 android.os.Handler.dispatchMessage:99 android.os.Looper.loop:226 2020-11-05 22:49:29.396 10556-10598/? W/Settings: Setting airplane_mode_on has moved from android.provider.Settings.System to android.provider.Settings.Global, returning read-only value. 2020-11-05 22:49:29.520 1663-1663/? D/Intent: disableDeathOnFileUriExposure com.android.chrome 2020-11-05 22:49:29.568 19152-19332/? I/BtGatt.ScanManager: msg.what = 6 2020-11-05 22:49:29.591 818-818/? I//vendor/bin/hw/vendor.qti.hardware.servicetracker@1.0-service: size of service connections for service: com.android.chrome/org.chromium.components.background_task_scheduler.BackgroundTaskJobServiceafter removal is 0 2020-11-05 22:49:29.591 818-818/? I//vendor/bin/hw/vendor.qti.hardware.servicetracker@1.0-service: size of client connections for client: systemafter removal is 16 2020-11-05 22:49:29.593 22324-23131/? D/Intent: disableDeathOnFileUriExposure com.android.chrome 2020-11-05 22:49:29.611 22324-22324/? E/cr_BkgrdTaskJS: Tried finishing non-current BackgroundTask. 2020-11-05 22:49:29.683 14000-24041/? E/MCS2.0_CIPHER_ALGO: checkSign 1 2020-11-05 22:49:29.691 14000-24041/? D/MCS2.0_CIPHER_ALGO: riv native_AES_encrypt flag 0 2020-11-05 22:49:34.182 1663-2761/? W/Watchdog: !@WatchDog_3773 2020-11-05 22:49:29.705 14000-24041/? D/MCS2.0_CIPHER_ALGO: riv native_AES_encrypt flag 0 2020-11-05 22:49:34.577 1663-1663/? D/Intent: disableDeathOnFileUriExposure com.facebook.katana 2020-11-05 22:49:34.622 19152-19332/? I/BtGatt.ScanManager: msg.what = 6 2020-11-05 22:49:35.253 818-818/? I//vendor/bin/hw/vendor.qti.hardware.servicetracker@1.0-service: size of service connections for service: com.facebook.katana/com.facebook.analytics2.logger.LollipopUploadServiceafter removal is 0 2020-11-05 22:49:35.253 818-818/? I//vendor/bin/hw/vendor.qti.hardware.servicetracker@1.0-service: size of client connections for client: systemafter removal is 16 2020-11-05 22:49:38.656 1663-1673/? I/system_server: Background concurrent copying GC freed 90991(7MB) AllocSpace objects, 40(976KB) LOS objects, 17% free, 36MB/44MB, paused 563us total 168.097ms 2020-11-05 22:49:38.830 1663-1663/? D/BatteryService: send broadcast : oppo.intent.action.BATTERY_DATA_UPDATE 2020-11-05 22:49:38.831 1663-1663/? W/ContextImpl: Calling a method in the system process without a qualified user: android.app.ContextImpl.sendBroadcast:1025 com.android.server.BatteryService$8.run:803 android.os.Handler.handleCallback:873 android.os.Handler.dispatchMessage:99 android.os.Looper.loop:226 2020-11-05 22:49:39.072 1663-4881/? W/System.err: java.io.FileNotFoundException: /proc/blackCheckStatus (No such file or directory) 2020-11-05 22:49:39.073 1663-4881/? W/System.err: at java.io.FileInputStream.open0(Native Method) 2020-11-05 22:49:39.073 1663-4881/? W/System.err: at java.io.FileInputStream.open(FileInputStream.java:231) 2020-11-05 22:49:39.073 1663-4881/? W/System.err: at java.io.FileInputStream.(FileInputStream.java:165) 2020-11-05 22:49:39.073 1663-4881/? W/System.err: at android.os.FileUtils.readTextFile(FileUtils.java:514) 2020-11-05 22:49:39.073 1663-4881/? W/System.err: at com.android.server.BootReceiver$2.run(BootReceiver.java:232) 2020-11-05 22:49:39.074 1663-4882/? W/System.err: java.io.FileNotFoundException: /proc/brightCheckStatus (No such file or directory) 2020-11-05 22:49:39.075 1663-4882/? W/System.err: at java.io.FileInputStream.open0(Native Method) 2020-11-05 22:49:39.075 1663-4882/? W/System.err: at java.io.FileInputStream.open(FileInputStream.java:231) 2020-11-05 22:49:39.075 1663-4882/? W/System.err: at java.io.FileInputStream.(FileInputStream.java:165) 2020-11-05 22:49:39.075 1663-4882/? W/System.err: at android.os.FileUtils.readTextFile(FileUtils.java:514) 2020-11-05 22:49:39.075 1663-4882/? W/System.err: at com.android.server.BootReceiver$3.run(BootReceiver.java:259) 2020-11-05 22:49:40.739 818-818/? I//vendor/bin/hw/vendor.qti.hardware.servicetracker@1.0-service: size of client connections for client: com.android.chromeafter removal is 3 2020-11-05 22:49:41.368 5961-5965/? E/rutils: releaseProcess gCount = 1 2020-11-05 22:49:41.475 10556-10598/? W/Settings: Setting airplane_mode_on has moved from android.provider.Settings.System to android.provider.Settings.Global, returning read-only value. 2020-11-05 22:49:49.067 1663-1663/? D/BatteryService: send broadcast : oppo.intent.action.BATTERY_DATA_UPDATE 2020-11-05 22:49:49.068 1663-1663/? W/ContextImpl: Calling a method in the system process without a qualified user: android.app.ContextImpl.sendBroadcast:1025 com.android.server.BatteryService$8.run:803 android.os.Handler.handleCallback:873 android.os.Handler.dispatchMessage:99 android.os.Looper.loop:226 2020-11-05 22:49:53.552 10556-10598/? W/Settings: Setting airplane_mode_on has moved from android.provider.Settings.System to android.provider.Settings.Global, returning read-only value. 2020-11-05 22:49:55.710 22324-22457/? E/Parcel: Reading a NULL string not supported here. 2020-11-05 22:50:00.080 1663-1663/? D/BatteryService: send broadcast : oppo.intent.action.BATTERY_DATA_UPDATE 2020-11-05 22:50:00.081 1663-1663/? W/ContextImpl: Calling a method in the system process without a qualified user: android.app.ContextImpl.sendBroadcast:1025 com.android.server.BatteryService$8.run:803 android.os.Handler.handleCallback:873 android.os.Handler.dispatchMessage:99 android.os.Looper.loop:226 builderror
Executing tasks: [:app:assembleDebug] in project G:\SOFTWARES\Recyclerview
Task :app:preBuild UP-TO-DATE Task :app:preDebugBuild UP-TO-DATE Task :app:compileDebugAidl NO-SOURCE Task :app:generateDebugBuildConfig UP-TO-DATE Task :app:compileDebugRenderscript NO-SOURCE Task :app:javaPreCompileDebug UP-TO-DATE Task :app:generateDebugResValues UP-TO-DATE Task :app:generateDebugResources UP-TO-DATE Task :app:createDebugCompatibleScreenManifests UP-TO-DATE Task :app:extractDeepLinksDebug UP-TO-DATE Task :app:processDebugManifest UP-TO-DATE Task :app:mergeDebugShaders UP-TO-DATE Task :app:compileDebugShaders NO-SOURCE Task :app:generateDebugAssets UP-TO-DATE Task :app:mergeDebugAssets UP-TO-DATE Task :app:mergeDebugResources Task :app:processDebugResources
Task :app:compileDebugJavaWithJavac G:\SOFTWARES\Recyclerview\app\src\main\java\com\example\recyclerview\MainActivity.java:23: error: cannot find symbol recyclerView = (RecyclerView) findViewById(R.id.recyclerView); ^ symbol: variable recyclerView location: class id Note: G:\SOFTWARES\Recyclerview\app\src\main\java\com\example\recyclerview\ProductAdapter.java uses or overrides a deprecated API. Note: Recompile with -Xlint:deprecation for details. 1 error
Task :app:compileDebugJavaWithJavac FAILED
FAILURE: Build failed with an exception.
- What went wrong: Execution failed for task ':app:compileDebugJavaWithJavac'.
Compilation failed; see the compiler error output for details.
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
BUILD FAILED in 1m 14s 11 actionable tasks: 3 executed, 8 up-to-date
Mainactivity.java package com.example.recyclerview;
...ANSWER
Answered 2020-Nov-18 at 12:01Please set the id in recyclerview.
android:id="@+id/recyclerView"
QUESTION
I am trying to make dynamical list using RecyclerView
and CardView
using tutorial from this site and I am getting this error:
ANSWER
Answered 2020-Nov-04 at 20:35At the start dataSet
will be null until you assign it a value, and then feed it back with data, so change getItemCount()
to below to return 0 data when it's null
QUESTION
I have a bit of a dilemma. I'll try to explain it as simply as I can.
My app has a page where I show a feed of posts through a recycler view (represented by the blue rectangles):
This is simple enough, as I've created a PostAdapter
class for the recycler view where I handle all the child view logic.
Now I have another requirement where I need a page that shows a post (blue rectangle) at the top of the recycler view, and then the replies to that post below it (represented by the red rectangles):
Please remember that the blue and red rectangles are simplifications. Each of these views has dozens of child views and hundreds of lines of code of logic each.
I've created another class, ReplyAdapter
, for the recycler view on this page, which handles all the logic for the replies.
My problem now becomes: how can I also show the post (blue rectangle) at the top of the recycler view?
I know that I can modify ReplyAdapter
to allow for multiple types (as explained here), but because these are already two separate classes, each with their own complex logic, that's not really a possibility for me.
So my question is: is there a way to keep the logic of the two adapters separate while still being able to use both under the same recycler view? If so, how? If no, what should I do?
...ANSWER
Answered 2020-Oct-09 at 04:22If your use case is exactly this - data from PostAdapter
on top, data from ReplyAdapter
below - then androidx.recyclerview.widget.ConcatAdapter may help. As its name implies, it concatenates adapters.
QUESTION
First of all, I have looked at similar questions (for example, this one: Android RecyclerView ItemTouchHelper revert swipe and restore view holder). This already helped a great deal, until I - more or less, accidentally - noticed my current (and hopefully, final) issue with this screen of mine.
Let's start with the setup:
I have a fragment with a RecyclerView filled with some CardView items (it's a little fancier, but that's what is important right now). I also created an ItemTouchHelper with the implementation of SimpleCallback (nothing in onMove()
) to make swiping the items (right) possible. For the record: I am using API 27 right now.
So far, so good.
What I want to achieve:
I want to be able to swipe the items to be notified through the onSwiped()
method of my SimpleCallback implementation. Also, I do NOT want the items to disappear, be removed, or otherwise taken out of my list of items in the RecyclerView. I just want to swipe them and have them return to their original position afterward (and yes, I know that it is sort of assumed that swiped items get removed). I am using the notifyItemChanged()
method of my adapter in the onSwiped()
method (also tried using notifyDataSetChanged()
).
The problem:
Funnily enough, that works (mostly thanks to the aforementioned question) - until I hit that "app switch" button (don't know if there's actually one official name for it) and send the app to the background. Once I put it in the foreground again and start swiping, the items will not (visually) return. They are still on the list, and if I scroll or click the "app switch" button again, they will be displayed properly again (but won't return on swiping). Same if I navigate back one screen and come back to the list.
That makes me think something happens when I send the app to the background and recover it. Something different than navigating to that screen (in which case everything works as intended) - which I thought would more or less produce the same results. Any ideas what I might be overlooking here?
ANSWER
Answered 2020-Sep-29 at 14:32After some testing, I finally found the source of the issue:
I had both the RecyclerView and its Adapter initialised through onStart()
of the Fragment and not onViewCreated()
. After changing that, I got the proper results I wanted.
Lesson learned: Set your RecyclerView's Adapter as early as possible, unless you want to deal with sometimes strange issues.
QUESTION
I am using Android 3.6.1 and working on source code from https://www.android-examples.com/android-recyclerview-listview-with-imageview-textview-json/ where I am trying to retrieves the images from the server.
I have stored the images to the server and inserted absolute path in MYSQL Database as below How to retrives Images from above root path?. and what is URL for retrives the images
...ANSWER
Answered 2020-Mar-23 at 07:24Due to some bad coding my "MySQL Database" Stored sum wrong path I mean it stored absolute path as below:
QUESTION
Following this guide, I tried implementing RecycleView
into Fragments. I got the error
E/RecyclerView: No adapter attached; skipping layout
The recycle view don't display anything
I tried
recyclerview No adapter attached; skipping layout
RecyclerView in Fragment : No adapter attached skipping layout
and many more.
My Code:
...ANSWER
Answered 2019-Dec-20 at 04:31You are sending empty list to adapter constructor. Right Way
QUESTION
I am implementing Two-Way DataBinding with Android Architecture Components using LiveData
and ViewModel
, but when I build the project it gives
ANSWER
Answered 2019-Mar-26 at 18:47You can use getter of particular variable directly using get()
method to variable (also works for setter too as set(value)
) like below :
QUESTION
I am implementing pagination logic with RecyclerView
by adding addOnScrollListener
function.
The onScrolled
method is called once when the RecyclerView adapter is loaded with dy value of 0. However when the list reaches its end when scrolled, the onScrolled
method is not triggered while the onScrollStateChanged
is triggered correctly.
Here is my Adapter:
...ANSWER
Answered 2020-Jan-11 at 15:14An alternative is to check if the recycler can scroll vertically if it cannot then it means it has reached the bottom.
Try this
QUESTION
Following some articles, I am trying to create an android app with the following:
- A
recyclerview
which fetches data from room database using live data. - Data structure is a list of custom objects with an attribute for ordering the data.
Features in recyclerview:
- Drag and drop for reordering data
- Swipe to delete
- UNDO action for swipe to delete
Referred articles:
- Google codelabs for room database and live data
- AndroidHive article for recyclerview swipe to delete and undo to restore deleted item
- Medium post by Paul Burke for drag/drop in recycler view
- Medium post by Paul Burke for customizing dragged item in recycler view
- SO Post to detect drop event in recycler view
My problem:
Data reordering is not updated in the room library.
Note:
I am using an attribute for data ordering
Please refer this GitHub repository if you need more details of the implementation.I have created a sample app for this question.
(Adding complete code in question seems too long, kindly refer my github repository for the code)
Please drop a comment if code of a particular file is required.I am not sure which code to post.
MainFragment.java (Code to reorder data, which is not working)
...ANSWER
Answered 2019-May-04 at 16:08Here is an easy approach for ordering items, used it with Room Database.
Entity Object (Model):
A column for order, type Integer:
Community Discussions, Code Snippets contain sources that include Stack Exchange Network
Vulnerabilities
No vulnerabilities reported
Install Android-RecyclerView
You can use Android-RecyclerView like any standard Java library. Please include the the jar files in your classpath. You can also use any IDE and you can run and debug the Android-RecyclerView component as you would do with any other Java program. Best practice is to use a build tool that supports dependency management such as Maven or Gradle. For Maven installation, please refer maven.apache.org. For Gradle installation, please refer gradle.org .
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