App crashes when clicked on deny camera permission on android 10 device

[akshaybenk]

java.lang.RuntimeException: Failure delivering result ResultInfo{who=@android:requestPermissions:, request=1, result=-1, data=Intent { act=android.content.pm.action.REQUEST_PERMISSIONS (has extras) }} to activity {MainActivity}: java.lang.NullPointerException: Attempt to read from field 'io.flutter.plugin.common.MethodChannel$Result com.github.rmtmckenzie.qrmobilevision.QrMobileVisionPlugin$ReadingInstance.startResult' on a null object reference at android.app.ActivityThread.deliverResults(ActivityThread.java:4846) at android.app.ActivityThread.handleSendResult(ActivityThread.java:4887) at android.app.servertransaction.ActivityResultItem.execute(ActivityResultItem.java:51) at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:135) at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:95) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2017) at android.os.Handler.dispatchMessage(Handler.java:107) at android.os.Looper.loop(Looper.java:214) at android.app.ActivityThread.main(ActivityThread.java:7403) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:492) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:935) Caused by: java.lang.NullPointerException: Attempt to read from field 'io.flutter.plugin.common.MethodChannel$Result com.github.rmtmckenzie.qrmobilevision.QrMobileVisionPlugin$ReadingInstance.startResult' on a null object reference at com.github.rmtmckenzie.qrmobilevision.QrMobileVisionPlugin.startingFailed(QrMobileVisionPlugin.java:183) at com.github.rmtmckenzie.qrmobilevision.QrMobileVisionPlugin.onRequestPermissionsResult(QrMobileVisionPlugin.java:64) at io.flutter.embedding.engine.FlutterEnginePluginRegistry$FlutterEngineActivityPluginBinding.onRequestPermissionsResult(FlutterEnginePluginRegistry.java:612) at io.flutter.embedding.engine.FlutterEnginePluginRegistry.onRequestPermissionsResult(FlutterEnginePluginRegistry.java:356) at io.flutter.embedding.android.FlutterActivityAndFragmentDelegate.onRequestPermissionsResult(FlutterActivityAndFragmentDelegate.java:509) at io.flutter.embedding.android.FlutterActivity.onRequestPermissionsResult(FlutterActivity.java:611) at android.app.Activity.dispatchRequestPermissionsResult(Activity.java:8264) at android.app.Activity.dispatchActivityResult(Activity.java:8114) at android.app.ActivityThread.deliverResults(ActivityThread.java:4839) at android.app.ActivityThread.handleSendResult(ActivityThread.java:4887)  at android.app.servertransaction.ActivityResultItem.execute(ActivityResultItem.java:51)  at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:135)  at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:95)  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2017)  at android.os.Handler.dispatchMessage(Handler.java:107)  at android.os.Looper.loop(Looper.java:214)  at android.app.ActivityThread.main(ActivityThread.java:7403)  at java.lang.reflect.Method.invoke(Native Method)  at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:492)  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:935) 

The above log is printed when the app crashes.
The device used is miA2

[✓] Flutter (Channel stable, v1.12.13+hotfix.7, on Mac OS X 10.15.3 19D76, locale en-GB)

[✓] Android toolchain - develop for Android devices (Android SDK version 29.0.1)
[✓] Xcode - develop for iOS and macOS (Xcode 11.3.1)
[✓] Android Studio (version 3.5)

Please look into this ASAP

[nmhernandez10]

I have the same issue :(

[booooza]

Same here on Android 9 and iOS 12. It can be prevented if QrCamera is wrapped with a permission check (e.g. with permission_handler) and the permission is requested before QrCamera gets rendered. Nevertheless is should probably be handled by the library.

[rmtmckenzie]

Closing as a duplicate of #59, but I think the issue still probably exists. I'll look into it when I get a minute, should be fairly soon now.

[booooza]

@rmtmckenzie yes, issue still exists with Version 1.0.0 (Android 9 and iOS 12)