Application crash after sending it to background (process kill)

[Jacek Czerski]

Overview

At the very beginning I would like you thank you for great library which solves developer problems in a beautiful style.

I found a problem when system permission dialog appears and we put app to the background.

Code snippet for fragment (for activity is same behaviour):

class TestFragment : Fragment() {

    private lateinit var locationPermissionRequester: PermissionsRequester

    override fun onAttach(context: Context) {
        super.onAttach(context)
        locationPermissionRequester = constructLocationPermissionRequest(LocationPermission.FINE) {
            // do nothing
        }
    }

    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
        super.onViewCreated(view, savedInstanceState)
        locationPermissionRequester.launch()
    }
}

Stacktrace:

java.lang.RuntimeException: Unable to start activity ComponentInfo{my.app.debug/my.app..RootActivity}: java.lang.IllegalStateException: FragmentManager is already executing transactions
   android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3270)
   android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3409)
   android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:83)
   android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:135)
   android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:95)
   android.app.ActivityThread$H.handleMessage(ActivityThread.java:2016)
   android.os.Handler.dispatchMessage(Handler.java:107)
   android.os.Looper.loop(Looper.java:214)
   android.app.ActivityThread.main(ActivityThread.java:7356)
   java.lang.reflect.Method.invoke(Native Method)
   com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:492)
   com.android.internal.os.ZygoteInit.main(ZygoteInit.java:930)
Caused by:
java.lang.IllegalStateException: FragmentManager is already executing transactions
   androidx.fragment.app.FragmentManager.ensureExecReady(FragmentManager.java:1919)
   androidx.fragment.app.FragmentManager.execSingleAction(FragmentManager.java:1955)
   androidx.fragment.app.BackStackRecord.commitNowAllowingStateLoss(BackStackRecord.java:311)
   permissions.dispatcher.ktx.PermissionRequestFragment.dismiss(PermissionRequestFragment.kt:26)
   permissions.dispatcher.ktx.PermissionRequestFragment$NormalRequestPermissionFragment.onRequestPermissionsResult(PermissionRequestFragment.kt:56)
   androidx.fragment.app.FragmentManager$11.onActivityResult(FragmentManager.java:2951)
   androidx.fragment.app.FragmentManager$11.onActivityResult(FragmentManager.java:2923)
   androidx.activity.result.ActivityResultRegistry.doDispatch(ActivityResultRegistry.java:362)
   androidx.activity.result.ActivityResultRegistry.dispatchResult(ActivityResultRegistry.java:322)
   androidx.activity.ComponentActivity.onRequestPermissionsResult(ComponentActivity.java:654)
   androidx.fragment.app.FragmentActivity.onRequestPermissionsResult(FragmentActivity.java:604)
   android.app.Activity.requestPermissions(Activity.java:5083)
   androidx.core.app.ActivityCompat.requestPermissions(ActivityCompat.java:516)
   androidx.activity.ComponentActivity$2.onLaunch(ComponentActivity.java:195)
   androidx.activity.result.ActivityResultRegistry$3.launch(ActivityResultRegistry.java:219)
   androidx.activity.result.ActivityResultLauncher.launch(ActivityResultLauncher.java:47)
   androidx.fragment.app.FragmentManager.launchRequestPermissions(FragmentManager.java:3028)
   androidx.fragment.app.Fragment.requestPermissions(Fragment.java:1559)
   permissions.dispatcher.ktx.PermissionRequestFragment$NormalRequestPermissionFragment.onCreate(PermissionRequestFragment.kt:32)
   androidx.fragment.app.Fragment.performCreate(Fragment.java:2936)
   androidx.fragment.app.FragmentStateManager.create(FragmentStateManager.java:472)
   androidx.fragment.app.FragmentStateManager.moveToExpectedState(FragmentStateManager.java:278)
   androidx.fragment.app.FragmentStore.moveToExpectedState(FragmentStore.java:112)
   androidx.fragment.app.FragmentManager.moveToState(FragmentManager.java:1636)
   androidx.fragment.app.FragmentManager.dispatchStateChange(FragmentManager.java:3112)
   androidx.fragment.app.FragmentManager.dispatchCreate(FragmentManager.java:3045)
   androidx.fragment.app.FragmentController.dispatchCreate(FragmentController.java:240)
   androidx.fragment.app.FragmentActivity.onCreate(FragmentActivity.java:272)
   my.app.RootActivity.onCreate(RootActivity.kt:147)
   android.app.Activity.performCreate(Activity.java:7802)
   android.app.Activity.performCreate(Activity.java:7791)
   android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1299)
   android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3245)
   android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3409)
   android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:83)
   android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:135)
   android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:95)
   android.app.ActivityThread$H.handleMessage(ActivityThread.java:2016)
   android.os.Handler.dispatchMessage(Handler.java:107)
   android.os.Looper.loop(Looper.java:214)
   android.app.ActivityThread.main(ActivityThread.java:7356)
   java.lang.reflect.Method.invoke(Native Method)
   com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:492)
   com.android.internal.os.ZygoteInit.main(ZygoteInit.java:930)

Expected

• App does not crash

Actual

• App crashes

Environment

• Permissions Dispatcher version 4.8.0 and Permissions Dispatcher KTX version 1.0.4
• Android 29, 30

Reproducible steps

1. To make it easier to reproduce this bug, turn on "Don't keep activities" in developer options
2. Run the app with activity or fragment with permission
3. When pop up asking about permission will appear, send app to background
4. Return to the app

Thank you for the help in advance.
Jack

[Shintaro Katafuchi]

thx, I could repro 🙏

[Jacek Czerski]

@hotchemi thank you for review and I'm waiting for release 😃

[Jacek Czerski]

@hotchemi can we expect ktx 1.0.5 release ?:)

[Shintaro Katafuchi]

sure I'll do!