IssueTracker

Component used: Activity

Version used: 1.2.0-alpha08

Devices/Android versions reproduced on: Pixel 2 XL Android 10

I've received several crash reports with the following stacktrace:

Fatal Exception: java.lang.ClassCastException: androidx.collection.ArrayMap cannot be cast to androidx.activity.result.ActivityResult
    at androidx.fragment.app.FragmentManager$10.onActivityResult(FragmentManager.java:2894)
    at androidx.activity.result.ActivityResultRegistry.dispatchResult(ActivityResultRegistry.java:316)
    at androidx.activity.ComponentActivity$2$1.run(ComponentActivity.java:158)
    at android.os.Handler.handleCallback(Handler.java:789)
    at android.os.Handler.dispatchMessage(Handler.java:98)
    at android.os.Looper.loop(Looper.java:164)
    at android.app.ActivityThread.main(ActivityThread.java:6944)
    at java.lang.reflect.Method.invoke(Method.java)
    at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:327)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1374)

It looks like the issue was starting to happen after these changes:

https://android-review.googlesource.com/c/platform/frameworks/support/+/1302324

https://android-review.googlesource.com/c/platform/frameworks/support/+/1348342

The default start number of request codes is set to 0x00010000, but in onRestoreInstanceState the value is set to the key map size:

https://android.googlesource.com/platform/frameworks/support/+/refs/heads/androidx-master-dev/activity/activity/src/main/java/androidx/activity/result/ActivityResultRegistry.java#281

This line should probably look like this: mNextRc.set(0x00010000 + numKeys);

This issue is a copy of https://issuetracker.google.com/issues/157584993. I've decided to create a new issue in androidx activity component since there is a little chance that anyone will look at the old issue which is closed without a proper fix.