Es posible que tu app de Android TV admita varias pistas de audio/texto para diferentes idiomas y parámetros de configuración de sonido envolvente de la misma manera que las apps de receptores web. Para admitir varias pistas y su selección, debes implementar lo siguiente en tu app de Android TV:
Proporciona información y estado de las pistas
En el caso del MediaInfo
de nivel superior, proporciona el MediaTracks
disponible con MediaInfoModifier
:
val mediaInfoModifier = CastReceiverContext.getInstance() .mediaManager.mediaStatusModifier.mediaInfoModifier mediaInfoModifier.setMediaTracks(Arrays.asList( new MediaTrack.Builder(1, MediaTrack.TYPE_AUDIO) .setName("English") ... build(), new MediaTrack.Builder(2, MediaTrack.TYPE_AUDIO) .setName("Spanish") ... .build() ))
MediaInfoModifier mediaInfoModifier = CastReceiverContext.getInstance() .getMediaManager().getMediaStatusModifier().getMediaInfoModifier(); mediaInfoModifier.setMediaTracks(Arrays.asList( new MediaTrack.Builder(1, MediaTrack.TYPE_AUDIO) .setName("English") ... build(), new MediaTrack.Builder(2, MediaTrack.TYPE_AUDIO) .setName("Spanish") ... .build() ));
Usa MediaTracksModifier
para reflejar los segmentos seleccionados actualmente:
val mediaStatusModifier: MediaTracksModifier = CastReceiverContext.getInstance() .mediaManager.mediaStatusModifier.getMediaTracksModifer() MediaTracksModifier.setActiveTrackIds(longArrayOf(1))
MediaTracksModifier mediaStatusModifier = CastReceiverContext.getInstance() .getMediaManager().getMediaStatusModifier().getMediaTracksModifer(); MediaTracksModifier.setActiveTrackIds(new long[]{1});
Los pasos anteriores pueden garantizar que el diálogo de selección de la pista del remitente refleje el estado correcto.
Cómo controlar la selección de pistas
Para admitir la selección de una pista, primero debes declarar MediaStatus.COMMAND_EDIT_TRACKS
como un comando multimedia compatible en MediaStatusModifier
:
CastReceiverContext .getInstance() .getMediaManager() .getMediaStatusModifier() .setMediaCommandSupported(MediaStatus.COMMAND_EDIT_TRACKS, true)
CastReceiverContext .getInstance() .getMediaManager() .getMediaStatusModifier() .setMediaCommandSupported(MediaStatus.COMMAND_EDIT_TRACKS, true);
Cuando el usuario selecciona pistas en el diálogo de selección de pistas del lado del remitente, tu app para Android TV recibe una devolución de llamada para cambiar los segmentos seleccionados.
Para controlar el comando, anula MediaCommandCallback
:
class MyMediaCommandCallback : MediaCommandCallback() { /** Text selection callback scoped to individual track types. */ override fun onSelectTracksByType( senderId: String?, type: Int, tracks: List): Task { return Tasks.call { // Update the track selection in your app. if (type == MediaTrack.TYPE_TEXT) { mySelectTextTracks(tracks) } else if (type == MediaTrack.TYPE_AUDIO) { mySelectAudioTracks(tracks) } // Update the track selection in the modifier to be used in MediaStatus. // This is also scoped to the given track type. mediaStatusModifier.getMediaTracksModifier().setActiveTracksByType( type, tracks ) null } } /** Callback for setting the text track style. */ override fun onSetTextTrackStyle( senderId: String?, textTrackStyle: TextTrackStyle ): Task { return Tasks.call { // Update the track style in your app. mySetTextTrackStyle(textTrackStyle) // Update the track style in the modifier. mediaStatusModifier.setTextTrackStyle(textTrackStyle) null } } // Override the following callback in case you want to handle the original // request. This is strongly not recommended. // // The default implementation automatically translates into // onSelectTracksByType() and onSetTextTrackStyle(). override fun onEditTracksInfo( senderId: String?, editTracksInfoData: EditTracksInfoData ): Task { ... } // Override the following callback in case you want to handle the original // request. This is strongly not recommended. override fun onEditAudioTracks( senderId: String?, editAudioTracksData: EditAudioTracksData ): Task { ... } }
public class MyMediaCommandCallback extends MediaCommandCallback { /** Text selection callback scoped to individual track types. */ @Override public TaskonSelectTracksByType( String senderId, int type, List tracks) { return Tasks.call(() -> { // Update the track selection in your app. if (type == MediaTrack.TYPE_TEXT) { mySelectTextTracks(tracks); } else if (type == MediaTrack.TYPE_AUDIO) { mySelectAudioTracks(tracks); } // Update the track selection in the modifier to be used in MediaStatus. // This is also scoped to the given track type. mediaStatusModifier.getMediaTracksModifier().setActiveTracksByType( type, tracks); return null; }); } /** Callback for setting the text track style. */ @Override public Task onSetTextTrackStyle( String senderId, TextTrackStyle textTrackStyle) { return Tasks.call(() -> { // Update the track style in your app. mySetTextTrackStyle(textTrackStyle); // Update the track style in the modifier. mediaStatusModifier.setTextTrackStyle(textTrackStyle); return null; }); } // Override the following callback in case you want to handle the original // request. This is strongly not recommended. // // The default implementation automatically translates into // onSelectTracksByType() and onSetTextTrackStyle(). @Override public Task onEditTracksInfo( String senderId, EditTracksInfoData editTracksInfoData) { ... } // Override the following callback in case you want to handle the original // request. This is strongly not recommended. @Override public Task onEditAudioTracks( String senderId, EditAudioTracksData editAudioTracksData) { ... } }