@override
void didChangeAppLifecycleState(AppLifecycleState state) {
  if (state == AppLifecycleState.inactive) {
    _cameraController?.stopVideoRecording();
  }
}

I/flutter ( 1868): AppLifecycleState.inactive
E/MethodChannel#plugins.flutter.io/camera( 1868): Failed to handle method call
E/MethodChannel#plugins.flutter.io/camera( 1868): java.lang.NullPointerException: Attempt to invoke virtual method 'void android.media.MediaRecorder.stop()' on a null object reference
E/MethodChannel#plugins.flutter.io/camera( 1868): 	at io.flutter.plugins.camera.CameraHandler$Camera.stopVideoRecording(CameraHandler.java:731)
E/MethodChannel#plugins.flutter.io/camera( 1868): 	at io.flutter.plugins.camera.CameraHandler$Camera.access$1000(CameraHandler.java:283)
E/MethodChannel#plugins.flutter.io/camera( 1868): 	at io.flutter.plugins.camera.CameraHandler.onMethodCall(CameraHandler.java:220)
E/MethodChannel#plugins.flutter.io/camera( 1868): 	at io.flutter.plugin.common.MethodChannel$IncomingMethodCallHandler.onMessage(MethodChannel.java:201)
E/MethodChannel#plugins.flutter.io/camera( 1868): 	at io.flutter.embedding.engine.dart.DartMessenger.handleMessageFromDart(DartMessenger.java:88)
E/MethodChannel#plugins.flutter.io/camera( 1868): 	at io.flutter.embedding.engine.FlutterJNI.handlePlatformMessage(FlutterJNI.java:219)
E/MethodChannel#plugins.flutter.io/camera( 1868): 	at android.os.MessageQueue.nativePollOnce(Native Method)
E/MethodChannel#plugins.flutter.io/camera( 1868): 	at android.os.MessageQueue.next(MessageQueue.java:323)
E/MethodChannel#plugins.flutter.io/camera( 1868): 	at android.os.Looper.loop(Looper.java:141)
E/MethodChannel#plugins.flutter.io/camera( 1868): 	at android.app.ActivityThread.main(ActivityThread.java:5603)
E/MethodChannel#plugins.flutter.io/camera( 1868): 	at java.lang.reflect.Method.invoke(Native Method)
E/MethodChannel#plugins.flutter.io/camera( 1868): 	at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:774)
E/MethodChannel#plugins.flutter.io/camera( 1868): 	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:652)
I/flutter ( 1868): AppLifecycleState.paused
I/flutter ( 1868): AppLifecycleState.inactive
I/CameraManager( 1868): Using legacy camera HAL.
I/flutter ( 1868): AppLifecycleState.resumed

[✓] Flutter (Channel dev, v1.5.8, on Mac OS X 10.14.4 18E226, locale ru-RU)
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