Java MediaSessionCompat类代码示例

import android.support.v4.media.session.MediaSessionCompat; //导入依赖的package包/类
public void buildNotification(Context context, final String albumName, final String artistName,
                              final String trackName, final Long albumId, final Bitmap albumArt,
                              final boolean isPlaying, MediaSessionCompat.Token mediaSessionToken) {

    if (Utils.hasOreo()){
        mNotificationManager.createNotificationChannel(AppNotificationChannels.getAudioChannel(context));
    }
    // Notification Builder
    mNotificationBuilder = new NotificationCompat.Builder(mService, AppNotificationChannels.AUDIO_CHANNEL_ID)
            .setShowWhen(false)
            .setSmallIcon(R.drawable.itunes)
            .setContentTitle(artistName)
            .setContentText(trackName)
            .setContentIntent(getOpenIntent(context))
            .setLargeIcon(BitmapFactory.decodeResource(context.getResources(), R.drawable.cover))
            .setPriority(Notification.PRIORITY_MAX)
            .setStyle(new MediaStyle()
                    .setMediaSession(mediaSessionToken)
                    .setShowCancelButton(true)
                    .setShowActionsInCompactView(0, 1, 2)
                    .setCancelButtonIntent(retreivePlaybackActions(4)))
            .addAction(new android.support.v4.app.NotificationCompat.Action(R.drawable.page_first, ""
                    , retreivePlaybackActions(3)))
            .addAction(new android.support.v4.app.NotificationCompat.Action(isPlaying ? R.drawable.pause : R.drawable.play, ""
                    , retreivePlaybackActions(1)))
            .addAction(new android.support.v4.app.NotificationCompat.Action(R.drawable.page_last, ""
                    , retreivePlaybackActions(2)));

    mService.startForeground(APOLLO_MUSIC_SERVICE, mNotificationBuilder.build());
}
 

import android.support.v4.media.session.MediaSessionCompat; //导入依赖的package包/类
private void setUpRemoteControlClient() {
    final Intent mediaButtonIntent = new Intent(Intent.ACTION_MEDIA_BUTTON);
    mediaButtonIntent.setComponent(mMediaButtonReceiverComponent);

    mAudioManager.requestAudioFocus(mAudioFocusListener, AudioManager.STREAM_MUSIC, AudioManager.AUDIOFOCUS_GAIN);
    mMediaSession = new MediaSessionCompat(getApplication(), "TAG", mMediaButtonReceiverComponent, null);
    mMediaSession.setFlags(MediaSessionCompat.FLAG_HANDLES_MEDIA_BUTTONS | MediaSessionCompat.FLAG_HANDLES_TRANSPORT_CONTROLS);
    PlaybackStateCompat playbackStateCompat = new PlaybackStateCompat.Builder()
            .setActions(
                    PlaybackStateCompat.ACTION_SEEK_TO |
                            PlaybackStateCompat.ACTION_SKIP_TO_PREVIOUS |
                            PlaybackStateCompat.ACTION_SKIP_TO_NEXT |
                            PlaybackStateCompat.ACTION_PLAY |
                            PlaybackStateCompat.ACTION_PAUSE |
                            PlaybackStateCompat.ACTION_STOP
            )
            .setState(isPlaying() ? PlaybackStateCompat.STATE_PLAYING : PlaybackStateCompat.STATE_PAUSED, position(), 1.0f)
            .build();

    mMediaSession.setPlaybackState(playbackStateCompat);
    mMediaSession.setCallback(mMediaSessionCallback);
    mMediaSession.setActive(true);
    updateRemoteControlClient(META_CHANGED);
    mTransportController = mMediaSession.getController().getTransportControls();

}
 

import android.support.v4.media.session.MediaSessionCompat; //导入依赖的package包/类
private void initializeMediaSession() {
    mMediaSession = new MediaSessionCompat(getContext(), TAG);
    mMediaSession.setFlags(
            MediaSessionCompat.FLAG_HANDLES_MEDIA_BUTTONS |
                    MediaSessionCompat.FLAG_HANDLES_TRANSPORT_CONTROLS);

    mMediaSession.setMediaButtonReceiver(null);
    mStateBuilder = new PlaybackStateCompat.Builder()
            .setActions(
                    PlaybackStateCompat.ACTION_PLAY |
                            PlaybackStateCompat.ACTION_PAUSE |
                            PlaybackStateCompat.ACTION_SKIP_TO_PREVIOUS |
                            PlaybackStateCompat.ACTION_PLAY_PAUSE);

    mMediaSession.setPlaybackState(mStateBuilder.build());
    mMediaSession.setCallback(new MySessionCallback());
    mMediaSession.setActive(true);
}
 

import android.support.v4.media.session.MediaSessionCompat; //导入依赖的package包/类
@Override
public void onCreate() {
    super.onCreate();

    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
        NotificationChannel notificationChannel = new NotificationChannel(NOTIFICATION_DEFAULT_CHANNEL_ID, getString(R.string.notification_channel_name), NotificationManagerCompat.IMPORTANCE_DEFAULT);
        NotificationManager notificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
        notificationManager.createNotificationChannel(notificationChannel);

        AudioAttributes audioAttributes = new AudioAttributes.Builder()
                .setUsage(AudioAttributes.USAGE_MEDIA)
                .setContentType(AudioAttributes.CONTENT_TYPE_MUSIC)
                .build();
        audioFocusRequest = new AudioFocusRequest.Builder(AudioManager.AUDIOFOCUS_GAIN)
                .setOnAudioFocusChangeListener(audioFocusChangeListener)
                .setAcceptsDelayedFocusGain(false)
                .setWillPauseWhenDucked(true)
                .setAudioAttributes(audioAttributes)
                .build();
    }

    audioManager = (AudioManager) getSystemService(Context.AUDIO_SERVICE);

    mediaSession = new MediaSessionCompat(this, "PlayerService");
    mediaSession.setFlags(MediaSessionCompat.FLAG_HANDLES_MEDIA_BUTTONS | MediaSessionCompat.FLAG_HANDLES_TRANSPORT_CONTROLS);
    mediaSession.setCallback(mediaSessionCallback);

    Context appContext = getApplicationContext();

    Intent activityIntent = new Intent(appContext, MainActivity.class);
    mediaSession.setSessionActivity(PendingIntent.getActivity(appContext, 0, activityIntent, 0));

    Intent mediaButtonIntent = new Intent(Intent.ACTION_MEDIA_BUTTON, null, appContext, MediaButtonReceiver.class);
    mediaSession.setMediaButtonReceiver(PendingIntent.getBroadcast(appContext, 0, mediaButtonIntent, 0));

    exoPlayer = ExoPlayerFactory.newSimpleInstance(new DefaultRenderersFactory(this), new DefaultTrackSelector(), new DefaultLoadControl());
    exoPlayer.addListener(exoPlayerListener);
    DataSource.Factory httpDataSourceFactory = new OkHttpDataSourceFactory(new OkHttpClient(), Util.getUserAgent(this, getString(R.string.app_name)), null);
    Cache cache = new SimpleCache(new File(this.getCacheDir().getAbsolutePath() + "/exoplayer"), new LeastRecentlyUsedCacheEvictor(1024 * 1024 * 100)); // 100 Mb max
    this.dataSourceFactory = new CacheDataSourceFactory(cache, httpDataSourceFactory, CacheDataSource.FLAG_BLOCK_ON_CACHE | CacheDataSource.FLAG_IGNORE_CACHE_ON_ERROR);
    this.extractorsFactory = new DefaultExtractorsFactory();
}
 

import android.support.v4.media.session.MediaSessionCompat; //导入依赖的package包/类
private void initializeMediaSession() {
    mSession = new MediaSessionCompat(this, TAG);
    mSession.setFlags(
            MediaSessionCompat.FLAG_HANDLES_MEDIA_BUTTONS
                    | MediaSessionCompat.FLAG_HANDLES_TRANSPORT_CONTROLS);
    mSession.setActive(true);
    MediaControllerCompat.setMediaController(this, mSession.getController());

    MediaMetadataCompat metadata = new MediaMetadataCompat.Builder()
            .putString(MediaMetadataCompat.METADATA_KEY_DISPLAY_TITLE, mMovieView.getTitle())
            .build();
    mSession.setMetadata(metadata);

    MediaSessionCallback mMediaSessionCallback = new MediaSessionCallback(mMovieView);
    mSession.setCallback(mMediaSessionCallback);

    int state =
            mMovieView.isPlaying()
                    ? PlaybackStateCompat.STATE_PLAYING
                    : PlaybackStateCompat.STATE_PAUSED;
    updatePlaybackState(
            state,
            MEDIA_ACTIONS_ALL,
            mMovieView.getCurrentPosition(),
            mMovieView.getVideoResourceId());
}
 

import android.support.v4.media.session.MediaSessionCompat; //导入依赖的package包/类
@Override
public void onCreate() {
    Log.d(TAG, "onCreate");
    super.onCreate();
    castSessionManager = CastContext.getSharedInstance(this).getSessionManager();

    // Create a MediaSessionCompat
    mediaSession = new MediaSessionCompat(this, TAG);

    // Enable callbacks from MediaButtons and TransportControls
    mediaSession.setFlags(MediaSessionCompat.FLAG_HANDLES_MEDIA_BUTTONS |
                    MediaSessionCompat.FLAG_HANDLES_TRANSPORT_CONTROLS);

    // Set an initial PlaybackState with ACTION_PLAY, so media buttons can start the player
    stateBuilder = new PlaybackStateCompat.Builder()
            .setActions(PlaybackStateCompat.ACTION_PLAY | PlaybackStateCompat.ACTION_PLAY_PAUSE);
    mediaSession.setPlaybackState(stateBuilder.build());

    // MySessionCallback() has methods that handle callbacks from a media controller
    mediaSession.setCallback(mediaSessionCallback);

    // Set the session's token so that client activities can communicate with it.
    setSessionToken(mediaSession.getSessionToken());
}
 

import android.support.v4.media.session.MediaSessionCompat; //导入依赖的package包/类
/**
 * Build a notification using the information from the given media session. Makes heavy use
 * of {@link MediaMetadataCompat#getDescription()} to extract the appropriate information.
 *
 * @param context      Context used to construct the notification.
 * @param mediaSession Media session to get information.
 * @return A pre-built notification with information from the given media session.
 */
static NotificationCompat.Builder from(
        Context context, MediaSessionCompat mediaSession) {
    MediaControllerCompat controller = mediaSession.getController();
    MediaMetadataCompat mediaMetadata = controller.getMetadata();
    MediaDescriptionCompat description = mediaMetadata.getDescription();

    NotificationCompat.Builder builder = new NotificationCompat.Builder(context);
    builder
            .setContentTitle(description.getTitle())
            .setContentText(description.getSubtitle())
            .setSubText(description.getDescription())
            .setLargeIcon(description.getIconBitmap())
            .setContentIntent(controller.getSessionActivity())
            .setDeleteIntent(
                    MediaButtonReceiver.buildMediaButtonPendingIntent(context, PlaybackStateCompat.ACTION_STOP))
            .setVisibility(NotificationCompat.VISIBILITY_PUBLIC);
    return builder;
}
 

import android.support.v4.media.session.MediaSessionCompat; //导入依赖的package包/类
@Override
public void onSkipToNext() {
    // Update the media to skip to the next video.
    Bundle bundle = new Bundle();
    bundle.putBoolean(AUTO_PLAY, true);

    int nextIndex = ++mQueueIndex;
    if (nextIndex < mQueue.size()) {
        MediaSessionCompat.QueueItem item = mQueue.get(nextIndex);
        String mediaId = item.getDescription().getMediaId();
        getActivity().getMediaController()
                .getTransportControls()
                .playFromMediaId(mediaId, bundle);
    } else {
        getActivity().onBackPressed(); // Return to details presenter.
    }
}
 

import android.support.v4.media.session.MediaSessionCompat; //导入依赖的package包/类
@Override
public void onSkipToPrevious() {
    // Update the media to skip to the previous video.
    setPlaybackState(PlaybackState.STATE_SKIPPING_TO_PREVIOUS);

    Bundle bundle = new Bundle();
    bundle.putBoolean(AUTO_PLAY, true);

    int prevIndex = --mQueueIndex;
    if (prevIndex >= 0) {
        MediaSessionCompat.QueueItem item = mQueue.get(prevIndex);
        String mediaId = item.getDescription().getMediaId();

        getActivity().getMediaController()
                .getTransportControls()
                .playFromMediaId(mediaId, bundle);
    } else {
        getActivity().onBackPressed(); // Return to details presenter.
    }
}
 

import android.support.v4.media.session.MediaSessionCompat; //导入依赖的package包/类
private MediaSessionCompat createMediaSession() {
    MediaSessionCompat mediaSession = new MediaSessionCompat(
            mContext,
            mContext.getString(R.string.app_name),
            new ComponentName(mContext.getPackageName(),
                    getButtonReceiverClassName()),
            null);
    mediaSession.setFlags(MediaSessionCompat.FLAG_HANDLES_MEDIA_BUTTONS
            | MediaSessionCompat.FLAG_HANDLES_TRANSPORT_CONTROLS);
    mediaSession.setCallback(mMediaSessionCallback);

    // TODO(mlamouri): the following code is to work around a bug that hopefully
    // MediaSessionCompat will handle directly. see b/24051980.
    try {
        mediaSession.setActive(true);
    } catch (NullPointerException e) {
        // Some versions of KitKat do not support AudioManager.registerMediaButtonIntent
        // with a PendingIntent. They will throw a NullPointerException, in which case
        // they should be able to activate a MediaSessionCompat with only transport
        // controls.
        mediaSession.setActive(false);
        mediaSession.setFlags(MediaSessionCompat.FLAG_HANDLES_TRANSPORT_CONTROLS);
        mediaSession.setActive(true);
    }
    return mediaSession;
}
 

import android.support.v4.media.session.MediaSessionCompat; //导入依赖的package包/类
public void handleMessage(Message msg) {
    if (this.mCallbacksMessengerRef != null) {
        Bundle data = msg.getData();
        data.setClassLoader(MediaSessionCompat.class.getClassLoader());
        switch (msg.what) {
            case 1:
                this.mCallbackImpl.onServiceConnected((Messenger) this.mCallbacksMessengerRef.get(), data.getString(MediaBrowserProtocol.DATA_MEDIA_ITEM_ID), (Token) data.getParcelable(MediaBrowserProtocol.DATA_MEDIA_SESSION_TOKEN), data.getBundle(MediaBrowserProtocol.DATA_ROOT_HINTS));
                return;
            case 2:
                this.mCallbackImpl.onConnectionFailed((Messenger) this.mCallbacksMessengerRef.get());
                return;
            case 3:
                this.mCallbackImpl.onLoadChildren((Messenger) this.mCallbacksMessengerRef.get(), data.getString(MediaBrowserProtocol.DATA_MEDIA_ITEM_ID), data.getParcelableArrayList(MediaBrowserProtocol.DATA_MEDIA_ITEM_LIST), data.getBundle(MediaBrowserProtocol.DATA_OPTIONS));
                return;
            default:
                Log.w(MediaBrowserCompat.TAG, "Unhandled message: " + msg + "\n  Client version: " + 1 + "\n  Service version: " + msg.arg1);
                return;
        }
    }
}
 

import android.support.v4.media.session.MediaSessionCompat; //导入依赖的package包/类
@Override
public void onCreate() {
    super.onCreate();
    playbackManager.setServiceCallback(this);
    playbackManager.setUpdateListener(this);
    mediaSession=new MediaSessionCompat(getApplicationContext(),TAG);
    mediaSession.setCallback(playbackManager.getMediaSessionCallback());
    mediaSession.setFlags(MediaSessionCompat.FLAG_HANDLES_MEDIA_BUTTONS |
            MediaSessionCompat.FLAG_HANDLES_TRANSPORT_CONTROLS);
    setSessionToken(mediaSession.getSessionToken());
    Context context = getApplicationContext();
    Intent intent = new Intent(context, TrackActivity.class);
    PendingIntent pi = PendingIntent.getActivity(context, 99,
            intent, PendingIntent.FLAG_UPDATE_CURRENT);
    mediaSession.setSessionActivity(pi);
    notification=new TrackNotification(this);
    playbackManager.updatePlaybackState(PlaybackStateCompat.STATE_NONE);
}
 

import android.support.v4.media.session.MediaSessionCompat; //导入依赖的package包/类
@Override
public void onCreate() {
    super.onCreate();

    // Create a new MediaSession.
    mSession = new MediaSessionCompat(this, "MusicService");
    mCallback = new MediaSessionCallback();
    mSession.setCallback(mCallback);
    mSession.setFlags(
            MediaSessionCompat.FLAG_HANDLES_MEDIA_BUTTONS |
            MediaSessionCompat.FLAG_HANDLES_QUEUE_COMMANDS |
            MediaSessionCompat.FLAG_HANDLES_TRANSPORT_CONTROLS);
    setSessionToken(mSession.getSessionToken());

    mMediaNotificationManager = new MediaNotificationManager(this);

    mPlayback = new MediaPlayerAdapter(this, new MediaPlayerListener());
    Log.d(TAG, "onCreate: MusicService creating MediaSession, and MediaNotificationManager");
}
 

import android.support.v4.media.session.MediaSessionCompat; //导入依赖的package包/类
private void setupMediaSession() {
    ComponentName mediaButtonReceiverComponentName = new ComponentName(getApplicationContext(), MediaButtonIntentReceiver.class);

    Intent mediaButtonIntent = new Intent(Intent.ACTION_MEDIA_BUTTON);
    mediaButtonIntent.setComponent(mediaButtonReceiverComponentName);


    PendingIntent mediaButtonReceiverPendingIntent = PendingIntent.getBroadcast(getApplicationContext(), 0, mediaButtonIntent, 0);

    mediaSession = new MediaSessionCompat(this, "RetroMusicPlayer", mediaButtonReceiverComponentName, mediaButtonReceiverPendingIntent);
    mediaSession.setCallback(new MediaSessionCompat.Callback() {
        @Override
        public void onPlay() {
            play();
        }

        @Override
        public void onPause() {
            pause();
        }

        @Override
        public void onSkipToNext() {
            playNextSong(true);
        }

        @Override
        public void onSkipToPrevious() {
            back(true);
        }

        @Override
        public void onStop() {
            quit();
        }

        @Override
        public void onSeekTo(long pos) {
            seek((int) pos);
        }

        @Override
        public boolean onMediaButtonEvent(Intent mediaButtonEvent) {
            return MediaButtonIntentReceiver.handleIntent(MusicService.this, mediaButtonEvent);
        }
    });

    mediaSession.setFlags(MediaSession.FLAG_HANDLES_TRANSPORT_CONTROLS
            | MediaSession.FLAG_HANDLES_MEDIA_BUTTONS);

    mediaSession.setMediaButtonReceiver(mediaButtonReceiverPendingIntent);
}
 

import android.support.v4.media.session.MediaSessionCompat; //导入依赖的package包/类
public static void update(Station station, int stationID, String stationMetadata, MediaSessionCompat session) {

        // session can be null on update
        if (session != null) {
            mSession = session;
        }

        // metadata can be null on update
        if (stationMetadata != null) {
            mStationMetadata = stationMetadata;
        }

        // build notification
        mNotification = getNotificationBuilder(station, stationID, mStationMetadata).build();

        // display updated notification
        NotificationManager notificationManager = (NotificationManager) mService.getSystemService(Context.NOTIFICATION_SERVICE);
        notificationManager.notify(PLAYER_SERVICE_NOTIFICATION_ID, mNotification);

        if (!station.getPlaybackState()) {
            // make notification swipe-able
            mService.stopForeground(false);
        }

    }