AudioService.pause return a Exception #391
Description
Which API doesn't behave as documented, and how does it misbehave?
The AudioService.pause() return a Exception in call with button.
Minimal reproduction project
The complete project is in https://github.com/yagoliveira92/radio-basic, but the call is:
return FloatingActionButton(
backgroundColor: mainColor,
onPressed: () => buttonChange(playing),
child: Container(
width: 120,
margin: EdgeInsets.all(7.5),
decoration: BoxDecoration(
shape: BoxShape.circle,
border: Border.all(color: Color(0xFF055D6F), width: 3.2)),
child: AnimatedIcon(
icon: AnimatedIcons.pause_play,
progress: _animateIcon,
color: Color(0xFF055D6F),
size: 35,
)),
);
The buttonChange call with this:
void buttonChange(bool playing) {
if (playing == AudioService.playbackState.playing) {
_animationController.forward();
player.pause();
} else {
_animationController.reverse();
player.play();
}
}
and the player.pause() is that:
pause() => AudioService.pause();
To Reproduce (i.e. user steps, not code)
Click in pause button after the music start
Error messages
Exception has occurred.
PlatformException (PlatformException(error, Attempt to invoke virtual method 'android.support.v4.media.session.MediaControllerCompat$TransportControls android.support.v4.media.session.MediaControllerCompat.getTransportControls()' on a null object reference, null))
Full log:
E/MethodChannel#ryanheise.com/audioService( 2508): Failed to handle method call
E/MethodChannel#ryanheise.com/audioService( 2508): java.lang.NullPointerException: Attempt to invoke virtual method 'android.support.v4.media.session.MediaControllerCompat$TransportControls android.support.v4.media.session.MediaControllerCompat.getTransportControls()' on a null object reference
E/MethodChannel#ryanheise.com/audioService( 2508): at com.ryanheise.audioservice.AudioServicePlugin$ClientHandler.onMethodCall(AudioServicePlugin.java:488)
E/MethodChannel#ryanheise.com/audioService( 2508): at io.flutter.plugin.common.MethodChannel$IncomingMethodCallHandler.onMessage(MethodChannel.java:226)
E/MethodChannel#ryanheise.com/audioService( 2508): at io.flutter.embedding.engine.dart.DartMessenger.handleMessageFromDart(DartMessenger.java:85)
E/MethodChannel#ryanheise.com/audioService( 2508): at io.flutter.embedding.engine.FlutterJNI.handlePlatformMessage(FlutterJNI.java:631)
E/MethodChannel#ryanheise.com/audioService( 2508): at android.os.MessageQueue.nativePollOnce(Native Method)
Expected behavior
Pause the music =D
Screenshots
This project is OpenSource. I create a Radio App to help others devs to make yours with the minimal design and usability. I used another version with AudioService and I trying update. The code is in https://github.com/yagoliveira92/radio-basic/tree/develop
Runtime Environment (please complete the following information if relevant):
Device: Google Pixel 2 (Genymotion) and Redmi 6A
OS: Android 9
Flutter SDK version
Doctor summary (to see all details, run flutter doctor -v):
[✓] Flutter (Channel stable, v1.17.4, on Linux, locale pt_BR.UTF-8)
[✓] Android toolchain - develop for Android devices (Android SDK version 29.0.2)
[✓] Android Studio (version 3.6)
[✓] VS Code (version 1.46.1)
[✓] Connected device (1 available)
• No issues found!
Additional context
All content show in my repository: https://github.com/yagoliveira92/radio-basic/tree/develop