Home | History | Annotate | Download | only in playback 
      1 page.title=
      2 page.tags=tv, mediasession
      3 
      4 trainingnavtop=true
      5 
      6 @jd:body
      7 
      8 <div id="tb-wrapper">
      9 <div id="tb">
     10   <h2></h2>
     11   <ol>
     12     <li><a href="#session">Media Session </a></li>
     13     <li><a href="#card"></a></li>
     14     <li><a href="#state"></a></li>
     15     <li><a href="#respond"> </a></li>
     16   </ol>
     17 
     18 </div>
     19 </div>
     20 
     21 <p>TV Android   [<em></em>]  TV </p>
     22 
     23 <p>[]     </p>
     24 
     25 <p>{@link android.media.session.MediaSession}  [] </p>
     26 
     27 <h2 id="session">Media Session </h2>
     28 
     29 <p><a href="{@docRoot}guide/components/activities"></a><a href="{@docRoot}guide/components/services"></a> {@link android.service.media.MediaBrowserService} </p>
     30 
     31 <p>{@link android.service.media.MediaBrowserService#onCreate() onCreate()}{@link android.media.session.MediaSession#MediaSession(android.content.Context, java.lang.String) MediaSession}  {@link android.service.media.MediaBrowserService}  </p>
     32 
     33 <pre>
     34 mSession = new MediaSession(this, "MusicService");
     35 mSession.setCallback(new MediaSessionCallback());
     36 mSession.setFlags(MediaSession.FLAG_HANDLES_MEDIA_BUTTONS |
     37         MediaSession.FLAG_HANDLES_TRANSPORT_CONTROLS);
     38 
     39 // for the MediaBrowserService
     40 setSessionToken(mSession.getSessionToken());
     41 </pre>
     42 
     43 <p class="note"><strong>:</strong>[] {@link android.media.session.MediaSession#FLAG_HANDLES_TRANSPORT_CONTROLS}  </p>
     44 
     45 <h2 id="card"></h2>
     46 
     47 <p>[] {@link android.media.session.MediaSession#setActive(boolean) setActive(true)} <a href="{@docRoot}training/managing-audio/audio-focus"> </a> </p>
     48 
     49 <pre>
     50 private void handlePlayRequest() {
     51 
     52     tryToGetAudioFocus();
     53 
     54     if (!mSession.isActive()) {
     55         mSession.setActive(true);
     56     }
     57 ...
     58 </pre>
     59 
     60 <p>{@link android.media.session.MediaSession#setActive(boolean) setActive(false)}   530  i</p>
     61 
     62 <h2 id="state"></h2>
     63 
     64 <p> {@link android.media.session.MediaSession} </p>
     65 
     66 <pre>
     67 private void updatePlaybackState() {
     68     long position = PlaybackState.PLAYBACK_POSITION_UNKNOWN;
     69     if (mMediaPlayer != null &amp;&amp; mMediaPlayer.isPlaying()) {
     70         position = mMediaPlayer.getCurrentPosition();
     71     }
     72     PlaybackState.Builder stateBuilder = new PlaybackState.Builder()
     73             .setActions(getAvailableActions());
     74     stateBuilder.setState(mState, position, 1.0f);
     75     mSession.setPlaybackState(stateBuilder.build());
     76 }
     77 private long getAvailableActions() {
     78     long actions = PlaybackState.ACTION_PLAY |
     79             PlaybackState.ACTION_PLAY_FROM_MEDIA_ID |
     80             PlaybackState.ACTION_PLAY_FROM_SEARCH;
     81     if (mPlayingQueue == null || mPlayingQueue.isEmpty()) {
     82         return actions;
     83     }
     84     if (mState == PlaybackState.STATE_PLAYING) {
     85         actions |= PlaybackState.ACTION_PAUSE;
     86     }
     87     if (mCurrentIndexOnQueue &gt; 0) {
     88         actions |= PlaybackState.ACTION_SKIP_TO_PREVIOUS;
     89     }
     90     if (mCurrentIndexOnQueue &lt; mPlayingQueue.size() - 1) {
     91         actions |= PlaybackState.ACTION_SKIP_TO_NEXT;
     92     }
     93     return actions;
     94 }
     95 </pre>
     96 
     97 <h2 id="metadata"></h2>
     98 
     99 <p>{@link android.media.session.MediaSession#setMetadata(android.media.MediaMetadata) setMetadata()} {@link android.media.MediaMetadata}    []    {@code MediaData} </p>
    100 
    101 <pre>
    102 private void updateMetadata(MediaData myData) {
    103     MediaMetadata.Builder metadataBuilder = new MediaMetadata.Builder();
    104     // To provide most control over how an item is displayed set the
    105     // display fields in the metadata
    106     metadataBuilder.putString(MediaMetadata.METADATA_KEY_DISPLAY_TITLE,
    107             myData.displayTitle);
    108     metadataBuilder.putString(MediaMetadata.METADATA_KEY_DISPLAY_SUBTITLE,
    109             myData.displaySubtitle);
    110     metadataBuilder.putString(MediaMetadata.METADATA_KEY_DISPLAY_ICON_URI,
    111             myData.artUri);
    112     // And at minimum the title and artist for legacy support
    113     metadataBuilder.putString(MediaMetadata.METADATA_KEY_TITLE,
    114             myData.title);
    115     metadataBuilder.putString(MediaMetadata.METADATA_KEY_ARTIST,
    116             myData.artist);
    117     // A small bitmap for the artwork is also recommended
    118     metadataBuilder.putString(MediaMetadata.METADATA_KEY_ART,
    119             myData.artBitmap);
    120     // Add any other fields you have for your data as well
    121     mSession.setMetadata(metadataBuilder.build());
    122 }
    123 </pre>
    124 
    125 <h2 id="respond"> </h2>
    126 
    127 <p> [] TV  {@link android.app.PendingIntent} {@link android.media.session.MediaSession#setSessionActivity(android.app.PendingIntent) setSessionActivity()} </p>
    128 
    129 <pre>
    130 Intent intent = new Intent(mContext, MyActivity.class);
    131     PendingIntent pi = PendingIntent.getActivity(context, 99 /*request code*/,
    132             intent, PendingIntent.FLAG_UPDATE_CURRENT);
    133     mSession.setSessionActivity(pi);
    134 </pre>
    135