Pause on interruption

[cosmok]

pause say when a call is received.
only on Android.

based off: https://gist.github.com/kuccello/5816882

[luanpotter]

Thanks, @cosmok ! Nice addition! That's indeed a very useful feature to the lib. Some comments:

• It seems that the stop function is not working, probably because of this typo:

    private static final String CMD_STOP = "pause";

• It seems that there is some commented out code on BroadcastReceiver that causes it to misbehave in my tests

• I'd add an option to allow this behavior to be disabled; someone might want to implement a background music player or something. But certainly the new way should be the default.

I'd add an optional parameter to the constructor (on Dart):

    AudioPlayer({ bool runOnBackground: false }) { /* ... */ }

Save that as a field and pass it in the play method on the channel:

    Future<int> play(String url, {bool isLocal: false, double volume: 1.0}) =>
_channel.invokeMethod('play', {"playerId": playerId, "url": url, "isLocal": isLocal, 'volume': volume, 'runOnBackground': runOnBackground });

And then receive this on the Android end and use it appropriately. Or something along those lines.

• It'd be nice to have it on iOS as well, but since it's not a breaking change, we can merge this up and even release and then wait for someone with macbooks and idevices to come and help us out.

Thanks again for your contribution!

[luanpotter]

Closing due to lack of response, please feel free to re-open or contact me anytime :))