IssueTracker

Can you provide the below requested information to better understand the issue:

Please provide sample project or apk to reproduce the issue.  Also mention the steps to be followed for reproducing the issue with the given sample project or apk.

Frequency
How frequently does this issue occur? (e.g 100% of the time, 10% of the time)

Expected output
What do you expect to occur?

Current output
What do you see instead?

logcat output
See http://developer.android.com/tools/help/logcat.html. Copy and paste relevant sections of the logcat output into this issue.

Sample project: https://github.com/guenodz/recyclerview-selection-demo
This bug happens also after clearing the selection using clearSelection() method

Frequency:
100% without clearing the selection.
50% after clearing the selection (calling clearSelection()).

Expected output:
The selection starts again in case the user deselect all items.

Current output:
Exception, ANR

logcat output:

FATAL EXCEPTION: main
Process: me.guendouz.recyclerview_item_selection, PID: 27856
java.lang.IllegalStateException
at android.support.v4.util.Preconditions.checkState(Preconditions.java:130)
at android.support.v4.util.Preconditions.checkState(Preconditions.java:142)
at androidx.recyclerview.selection.GestureSelectionHelper.start(GestureSelectionHelper.java:76)
at androidx.recyclerview.selection.SelectionTracker$Builder$4.run(SelectionTracker.java:742)
at androidx.recyclerview.selection.TouchInputHandler.onLongPress(TouchInputHandler.java:136)
at androidx.recyclerview.selection.GestureRouter.onLongPress(GestureRouter.java:95)
at android.view.GestureDetector.dispatchLongPress(GestureDetector.java:778)
at android.view.GestureDetector.-wrap0(Unknown Source:0)
at android.view.GestureDetector$GestureHandler.handleMessage(GestureDetector.java:293)
at android.os.Handler.dispatchMessage(Handler.java:105)
at android.os.Looper.loop(Looper.java:164)  
at android.app.ActivityThread.main(ActivityThread.java:6541)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:240)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:767)

We have passed this to the development team and will update this issue with more information as it becomes available.

I'm also seeing this issue - any update on a fix or suggested work around?

P.S. I'm using 28.0.0-alpha3 and it's still an issue. This crashes the app fairly easily so I can't ship my app with this defect - any workarounds or ETA for fix would be appreciated!

HI all ,
   Any update about issue?

For me the problem occurred only when for the same RecyclerView I created another SelectionTracker (like when user demanded selection multiple times I created new object each time). I fixed it and created only one SelectionTracker object and kept it through multiple selection demands, clearing selected items after each dismiss/processing.

The development team has fixed the issue that you have reported.

I still encounter this problem, version 1.1.0-alpha06. Steps to reproduce all the same:
1. Start selection
2. Select some items
3. Deselect items
4. Try to start selection from new item (those that were not selected previously)
5. Exception

Important note: these steps don't always work, I can't say why this is happening.

I am still encountering this issue. This is quite prominent when the data is updated with pagedList adapter. The notifyItemInserted sets the range to null and then I encounter this exception again. There is no workaround for this issue and no way to intercept this exception.

I am also facing this issue. I believe this ticket needs to be reopened.

Have the save issue

Hi any update?

Hello any update for this one ?

Still have this issue, after inserting some items, de-select and reselect them.

020-10-09 18:17:58.719 9007-9007/io.test E/AndroidRuntime: FATAL EXCEPTION: main
    java.lang.IllegalArgumentException
        at androidx.core.util.Preconditions.checkArgument(Preconditions.java:38)
        at androidx.recyclerview.selection.DefaultSelectionTracker.anchorRange(DefaultSelectionTracker.java:288)
        at androidx.recyclerview.selection.MotionInputHandler.selectItem(MotionInputHandler.java:60)
        at androidx.recyclerview.selection.TouchInputHandler.onLongPress(TouchInputHandler.java:164)
        at androidx.recyclerview.selection.GestureRouter.onLongPress(GestureRouter.java:97)
        at android.view.GestureDetector.dispatchLongPress(GestureDetector.java:779)
        at android.view.GestureDetector.access$200(GestureDetector.java:40)
        at android.view.GestureDetector$GestureHandler.handleMessage(GestureDetector.java:293)
        at android.os.Handler.dispatchMessage(Handler.java:106)
        at android.os.Looper.loop(Looper.java:193)
        at android.app.ActivityThread.main(ActivityThread.java:6669)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)

It seems the second check doesn't work

DefaultSelectionTracker.anchorRange(DefaultSelectionTracker.java:288)

@Override
    public void anchorRange(int position) {
        checkArgument(position != RecyclerView.NO_POSITION);
        checkArgument(mSelection.contains(mKeyProvider.getKey(position))); --> this seems to be null

        mRange = new Range(position, mRangeCallbacks);
    }

Hay is there any updates about this issue i am still facing this issue ??

+1