Fix crash with androidx appcompat 1.1.0

[benoitletondor]

This prevents a crash with appcompat 1.1.0.

Exception thrown:

E/AndroidRuntime: FATAL EXCEPTION: main
    Process: ***, PID: 5575
    java.lang.RuntimeException: Unable to destroy activity {***/***.MainActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'boolean androidx.fragment.app.FragmentManagerImpl.isDestroyed()' on a null object reference
        at android.app.ActivityThread.performDestroyActivity(ActivityThread.java:4458)
        at android.app.ActivityThread.handleDestroyActivity(ActivityThread.java:4476)
        at android.app.ActivityThread.handleRelaunchActivityInner(ActivityThread.java:4760)
        at android.app.ActivityThread.handleRelaunchActivity(ActivityThread.java:4693)
        at android.app.servertransaction.ActivityRelaunchItem.execute(ActivityRelaunchItem.java:69)
        at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:108)
        at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:68)
        at android.app.ClientTransactionHandler.executeTransaction(ClientTransactionHandler.java:55)
        at android.app.ActivityThread.handleRelaunchActivityLocally(ActivityThread.java:4743)
        at android.app.ActivityThread.access$3200(ActivityThread.java:199)
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1818)
        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)
     Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'boolean androidx.fragment.app.FragmentManagerImpl.isDestroyed()' on a null object reference
        at androidx.fragment.app.Fragment.performDetach(Fragment.java:2844)
        at androidx.fragment.app.FragmentManagerImpl.moveToState(FragmentManagerImpl.java:1033)
        at androidx.fragment.app.FragmentManagerImpl.moveFragmentToExpectedState(FragmentManagerImpl.java:1237)
        at androidx.fragment.app.FragmentManagerImpl.moveToState(FragmentManagerImpl.java:1302)
        at androidx.fragment.app.FragmentManagerImpl.dispatchStateChange(FragmentManagerImpl.java:2655)
        at androidx.fragment.app.FragmentManagerImpl.dispatchDestroy(FragmentManagerImpl.java:2640)
        at androidx.fragment.app.FragmentController.dispatchDestroy(FragmentController.java:329)
        at androidx.fragment.app.FragmentActivity.onDestroy(FragmentActivity.java:366)
        at androidx.appcompat.app.AppCompatActivity.onDestroy(AppCompatActivity.java:233)
        at ***.MainActivity.onDestroy(MainActivity.kt:376)
        at android.app.Activity.performDestroy(Activity.java:7395)
        at android.app.Instrumentation.callActivityOnDestroy(Instrumentation.java:1306)
        at android.app.ActivityThread.performDestroyActivity(ActivityThread.java:4443)

Associated google tracker issue: https://issuetracker.google.com/issues/135764330

[kevintorch]

im having the same issue with androidX...please help

[benoitletondor]

@kevintorch I ended up forking the repo and applied the exact same fix as in the PR and it works. You can do the same before it's merged ;)

[Protino]

@benoitletondor Can you please guide on how to include these changes by forking the library. Should I import this as a module? (Will I have to migrate this module to androidX too?)

[benoitletondor]

@Protino that's exactly what I did. Migrating it to androidX only took a few minutes, it's not complicated

[vpotvin]

For anyone looking for this fix without the trouble of doing it manually, I've released it here as a separate library: https://github.com/vpotvin/CaldroidX since this original library has not seen an update in 4 years.

[SophieSagot]

Wonderful, I was blocked that bug since 2 two days. Changing the dependencies made immediately every things work perfectly !!! Thank you for all.