It crashes when the app moves from the background to the foreground

[t.yamamoto]

Description
It crashes when the app moves from the background to the foreground.

Which Android Meeting SDK version?
zoom-sdk-android-5.7.6.1922

To Reproduce(If applicable)
Select Settings app → System → Developer options.
Check “Don’t keep activities”.

Select Zoom Sdk Sample app → Settings.
Check “Customized UI”.

1. Tap “Join this Meeting” in the Zoom Sdk Sample app to join the meeting.
2. Make Zoom Sdk Sample app go background
3. Return to Zoom Sdk Sample app
4. See error

Screenshots

2021-12-20 20:44:06.758 7244-7244/us.zoom.sdkexample E/AndroidRuntime: FATAL EXCEPTION: main
Process: us.zoom.sdkexample, PID: 7244
java.lang.RuntimeException: Unable to resume activity {us.zoom.sdkexample/us.zoom.sdksample.ui.LoginUserStartJoinMeetingActivity}: java.lang.NullPointerException: Attempt to invoke interface method ‘void us.zoom.sdk.ZoomUIService.setZoomUIDelegate(us.zoom.sdk.ZoomUIDelegate)’ on a null object reference
at android.app.ActivityThread.performResumeActivity(ActivityThread.java:4444)
at android.app.ActivityThread.handleResumeActivity(ActivityThread.java:4476)
at android.app.servertransaction.ResumeActivityItem.execute(ResumeActivityItem.java:52)
at android.app.servertransaction.TransactionExecutor.executeLifecycleState(TransactionExecutor.java:176)
at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:97)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2066)
at android.os.Handler.dispatchMessage(Handler.java:106)
at android.os.Looper.loop(Looper.java:223)
at android.app.ActivityThread.main(ActivityThread.java:7656)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:592)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:947)
Caused by: java.lang.NullPointerException: Attempt to invoke interface method ‘void us.zoom.sdk.ZoomUIService.setZoomUIDelegate(us.zoom.sdk.ZoomUIDelegate)’ on a null object reference
at us.zoom.sdksample.ui.LoginUserStartJoinMeetingActivity.onResume(LoginUserStartJoinMeetingActivity.java:89)
at android.app.Instrumentation.callActivityOnResume(Instrumentation.java:1456)
at android.app.Activity.performResume(Activity.java:8129)
at android.app.ActivityThread.performResumeActivity(ActivityThread.java:4434)
at android.app.ActivityThread.handleResumeActivity(ActivityThread.java:4476)
at android.app.servertransaction.ResumeActivityItem.execute(ResumeActivityItem.java:52)
at android.app.servertransaction.TransactionExecutor.executeLifecycleState(TransactionExecutor.java:176)
at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:97)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2066)
at android.os.Handler.dispatchMessage(Handler.java:106)
at android.os.Looper.loop(Looper.java:223)
at android.app.ActivityThread.main(ActivityThread.java:7656)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:592)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:947)
2021-12-20 20:44:08.295 7244-7260/us.zoom.sdkexample W/System: A resource failed to call close.

Smartphone (please complete the following information):

• Device: Android Emulator
• OS: Android 11

[jon.zoom (Jon)]

Hi @t.yamamoto, thanks for the post.

Are you able to reproduce this crash on a physical device, or is it only present when using an emulator?

Thanks!

[t.yamamoto]

The following physical device also crashed

• Pixel6(Android12)
• Nexus5X(Android8)

[jon.zoom (Jon)]

Hi @t.yamamoto,

Thanks for confirming that this is not specific to the emulator. I was able to reproduce the crash, so no further information will be required on your end. I will keep you updated as soon as we have any new information.

Thanks!

[jon.zoom (Jon)]

Hi @t.yamamoto,

We have identified a fix for this issue and will include it in the next release. If you didn’t already know, the best places to stay up-to-date with SDK releases are the #new-releases category and the changelog page.

Thanks!