private void pauseMedia() {
MediaControllerCompat controller =
((FragmentActivity) getActivity()).getSupportMediaController();
if (controller != null) {
controller.getTransportControls().pause();
}
}
public void onConnected() {
MediaControllerCompat controller =
((FragmentActivity) getActivity()).getSupportMediaController();
LogHelper.d(TAG, "onConnected, mediaController==null? ", controller == null);
if (controller != null) {
onMetadataChanged(controller.getMetadata());
onPlaybackStateChanged(controller.getPlaybackState());
controller.registerCallback(mCallback);
}
}
@Override
public void onStop() {
super.onStop();
LogHelper.d(TAG, "fragment.onStop");
MediaControllerCompat controller =
((FragmentActivity) getActivity()).getSupportMediaController();
if (controller != null) {
controller.unregisterCallback(mCallback);
}
}
/**
* Extracts any available {@link KeyEvent} from an {@link Intent#ACTION_MEDIA_BUTTON} intent,
* passing it onto the {@link MediaSessionCompat} using {@link
* MediaControllerCompat#dispatchMediaButtonEvent(KeyEvent)}, which in turn will trigger callbacks
* to the {@link MediaSessionCompat.Callback} registered via {@link
* MediaSessionCompat#setCallback(MediaSessionCompat.Callback)}.
*
* <p>The returned {@link KeyEvent} is non-null if any {@link KeyEvent} is found and can be used
* if any additional processing is needed beyond what is done in the {@link
* MediaSessionCompat.Callback}. An example of is to prevent redelivery of a {@link
* KeyEvent#KEYCODE_MEDIA_PLAY_PAUSE} Intent in the case of the Service being restarted (which, by
* default, will redeliver the last received Intent).
*
* <pre>
* KeyEvent keyEvent = MediaButtonReceiver.handleIntent(mediaSession, intent);
* if (keyEvent != null && keyEvent.getKeyCode() == KeyEvent.KEYCODE_MEDIA_PLAY_PAUSE) {
* Intent emptyIntent = new Intent(intent);
* emptyIntent.setAction("");
* startService(emptyIntent);
* }
* </pre>
*
* @param mediaSessionCompat A {@link MediaSessionCompat} that has a {@link
* MediaSessionCompat.Callback} set.
* @param intent The intent to parse.
* @return The extracted {@link KeyEvent} if found, or null.
*/
public static KeyEvent handleIntent(MediaSessionCompat mediaSessionCompat, Intent intent) {
if (mediaSessionCompat == null
|| intent == null
|| !Intent.ACTION_MEDIA_BUTTON.equals(intent.getAction())
|| !intent.hasExtra(Intent.EXTRA_KEY_EVENT)) {
return null;
}
KeyEvent ke = intent.getParcelableExtra(Intent.EXTRA_KEY_EVENT);
MediaControllerCompat mediaController = mediaSessionCompat.getController();
mediaController.dispatchMediaButtonEvent(ke);
return ke;
}
private void onPlaybackStateChanged(PlaybackStateCompat state) {
LogHelper.d(TAG, "onPlaybackStateChanged ", state);
if (getActivity() == null) {
LogHelper.w(
TAG,
"onPlaybackStateChanged called when getActivity null,"
+ "this should not happen if the callback was properly unregistered. Ignoring.");
return;
}
if (state == null) {
return;
}
boolean enablePlay = false;
switch (state.getState()) {
case PlaybackStateCompat.STATE_PAUSED:
case PlaybackStateCompat.STATE_STOPPED:
enablePlay = true;
break;
case PlaybackStateCompat.STATE_ERROR:
LogHelper.e(TAG, "error playbackstate: ", state.getErrorMessage());
Toast.makeText(getActivity(), state.getErrorMessage(), Toast.LENGTH_LONG).show();
break;
}
if (enablePlay) {
mPlayPause.setImageDrawable(
ContextCompat.getDrawable(getActivity(), R.drawable.ic_play_arrow_black_36dp));
} else {
mPlayPause.setImageDrawable(
ContextCompat.getDrawable(getActivity(), R.drawable.ic_pause_black_36dp));
}
MediaControllerCompat controller =
((FragmentActivity) getActivity()).getSupportMediaController();
String extraInfo = null;
if (controller != null && controller.getExtras() != null) {
String castName = controller.getExtras().getString(MusicService.EXTRA_CONNECTED_CAST);
if (castName != null) {
extraInfo = getResources().getString(R.string.casting_to_device, castName);
}
}
setExtraInfo(extraInfo);
}
@Override
public void onClick(View v) {
MediaControllerCompat controller =
((FragmentActivity) getActivity()).getSupportMediaController();
PlaybackStateCompat stateObj = controller.getPlaybackState();
final int state = stateObj == null ? PlaybackStateCompat.STATE_NONE : stateObj.getState();
LogHelper.d(TAG, "Button pressed, in state " + state);
switch (v.getId()) {
case R.id.play_pause:
LogHelper.d(TAG, "Play button pressed, in state " + state);
if (state == PlaybackStateCompat.STATE_PAUSED
|| state == PlaybackStateCompat.STATE_STOPPED
|| state == PlaybackStateCompat.STATE_NONE) {
playMedia();
} else if (state == PlaybackStateCompat.STATE_PLAYING
|| state == PlaybackStateCompat.STATE_BUFFERING
|| state == PlaybackStateCompat.STATE_CONNECTING) {
pauseMedia();
}
break;
}
}