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su...@google.com
ap...@google.com
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Which Android build are you using? (e.g. OPP1.170223.012)
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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)
Screen record of the issue, for clarity
Please capture screen record or video of the issue using following steps:
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su...@google.com
Android 9 on Nokia 7 Plus
Build number 00WW_3_54H_SP03
Android Studio 3.5.1 on macOS 10.13.6
compileSdkVersion 29
buildToolsVersion '29.0.2'
minSdkVersion 17
targetSdkVersion 28
implementation 'androidx.biometric:biometric:1.0.0-rc01'
Code taken from "Allow for fallback to non-biometric credentials" in
https://developer.android.com/training/sign-in/biometric-auth
Problem:
1. Show biometric prompt.
2. Tap "USE PASSWORD" instead of scanning fingerprint.
3. Unlock using pattern.
4. Activity stops responding.
See attached MP4 video.
This happens consistently.
Project attached in MyApplication.zip
Build number 00WW_3_54H_SP03
Android Studio 3.5.1 on macOS 10.13.6
compileSdkVersion 29
buildToolsVersion '29.0.2'
minSdkVersion 17
targetSdkVersion 28
implementation 'androidx.biometric:biometric:1.0.0-rc01'
Code taken from "Allow for fallback to non-biometric credentials" in
Problem:
1. Show biometric prompt.
2. Tap "USE PASSWORD" instead of scanning fingerprint.
3. Unlock using pattern.
4. Activity stops responding.
See attached MP4 video.
This happens consistently.
Project attached in MyApplication.zip
Description
Version used: 1.0.0-alpha06
Devices/Android versions reproduced on: Many
We can see a large number of ConcurrentModificationExceptions in WorkManager:
java.lang.RuntimeException: Error receiving broadcast Intent { act=android.net.conn.CONNECTIVITY_CHANGE flg=0x4000010 bqHint=4 (has extras) } in vu@2406837b
at android.app.LoadedApk$ReceiverDispatcher$Args.run(LoadedApk.java:988)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:145)
at android.app.ActivityThread.main(ActivityThread.java:7007)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1404)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1199)
Caused by: java.util.ConcurrentModificationException
at java.util.LinkedHashMap$LinkedHashIterator.nextEntry(LinkedHashMap.java:346)
at java.util.LinkedHashMap$KeyIterator.next(LinkedHashMap.java:366)
at androidx.work.impl.constraints.trackers.ConstraintTracker.setState(OperaSrc:89)
at androidx.work.impl.constraints.trackers.NetworkStateTracker$NetworkStateBroadcastReceiver.onReceive(OperaSrc:157)
at android.app.LoadedApk$ReceiverDispatcher$Args.run(LoadedApk.java:978)
It looks like the mListeners set is being modified during the loop in ConstraintTracker.setState(). I see two potential issues with this method:
1. Maybe a listener is added or removed in onConstraintChanged(). I haven't seen this happen, but it might be good to make a copy of mListeners and iterate over the copy.
2. The NetworkStateTracker.mNetworkCallback is called on a different thread than the main thread. In consequence setState() is called on a different thread so there is a possibility that the main thread adds or removes a listener. This cannot be the (only) reason because the error happens in response to the CONNECTIVITY_CHANGE.
This may be fixed with synchronization or by registering mNetworkCallback to run on the main thread.