下面列出了怎么用android.media.MediaDescription的API类实例代码及写法，或者点击链接到github查看源代码。
private MediaBrowser.MediaItem generatePlayableMediaItem( Song song ) {
if( song == null )
return null;
MediaDescription.Builder mediaDescriptionBuilder = new MediaDescription.Builder();
mediaDescriptionBuilder.setMediaId( song.getuId() );
if( !TextUtils.isEmpty( song.getTitle() ) )
mediaDescriptionBuilder.setTitle( song.getTitle() );
if( !TextUtils.isEmpty( song.getArtist() ) )
mediaDescriptionBuilder.setSubtitle( song.getArtist() );
if( !TextUtils.isEmpty( song.getThumbnailUrl() ) )
mediaDescriptionBuilder.setIconUri( Uri.parse( song.getThumbnailUrl() ) );
return new MediaBrowser.MediaItem( mediaDescriptionBuilder.build(), MediaBrowser.MediaItem.FLAG_PLAYABLE );
}
public Video buildFromMediaDesc(MediaDescription desc) {
return new Video(
Long.parseLong(desc.getMediaId()),
"", // Category - not provided by MediaDescription.
String.valueOf(desc.getTitle()),
String.valueOf(desc.getDescription()),
"", // Media URI - not provided by MediaDescription.
"", // Background Image URI - not provided by MediaDescription.
String.valueOf(desc.getIconUri()),
String.valueOf(desc.getSubtitle())
);
}
private void fillMediaItems(List<MediaBrowser.MediaItem> mediaItems, String mediaId, String title, Uri icon, String subTitle, int playableOrBrowsable) {
mediaItems.add(new MediaBrowser.MediaItem(
new MediaDescription.Builder()
.setMediaId(mediaId)
.setTitle(title)
.setIconUri(icon)
.setSubtitle(subTitle)
.build(), playableOrBrowsable
));
}
public Video buildFromMediaDesc(MediaDescription desc) {
return new Video(
Long.parseLong(desc.getMediaId()),
"", // Category - not provided by MediaDescription.
String.valueOf(desc.getTitle()),
String.valueOf(desc.getDescription()),
"", // Media URI - not provided by MediaDescription.
"", // Background Image URI - not provided by MediaDescription.
String.valueOf(desc.getIconUri()),
String.valueOf(desc.getSubtitle())
);
}
private MediaBrowser.MediaItem generateBrowseableMediaItemByGenre( String genre ) {
MediaDescription.Builder mediaDescriptionBuilder = new MediaDescription.Builder();
mediaDescriptionBuilder.setMediaId( genre );
mediaDescriptionBuilder.setTitle( genre );
mediaDescriptionBuilder.setIconBitmap( BitmapFactory.decodeResource( getResources(), R.drawable.folder ) );
return new MediaBrowser.MediaItem( mediaDescriptionBuilder.build(), MediaBrowser.MediaItem.FLAG_BROWSABLE );
}
private String getShortMetadataString() {
int fields = mMetadata == null ? 0 : mMetadata.size();
MediaDescription description = mMetadata == null ? null : mMetadata
.getDescription();
return "size=" + fields + ", description=" + description;
}
private void addMediaRoots(List<MediaBrowser.MediaItem> mMediaRoot) {
mMediaRoot.add(new MediaBrowser.MediaItem(
new MediaDescription.Builder()
.setMediaId(Integer.toString(TYPE_ARTIST))
.setTitle(getString(R.string.artists))
.setIconUri(Uri.parse("android.resource://" +
"naman14.timber/drawable/ic_empty_music2"))
.setSubtitle(getString(R.string.artists))
.build(), MediaBrowser.MediaItem.FLAG_BROWSABLE
));
mMediaRoot.add(new MediaBrowser.MediaItem(
new MediaDescription.Builder()
.setMediaId(Integer.toString(TYPE_ALBUM))
.setTitle(getString(R.string.albums))
.setIconUri(Uri.parse("android.resource://" +
"naman14.timber/drawable/ic_empty_music2"))
.setSubtitle(getString(R.string.albums))
.build(), MediaBrowser.MediaItem.FLAG_BROWSABLE
));
mMediaRoot.add(new MediaBrowser.MediaItem(
new MediaDescription.Builder()
.setMediaId(Integer.toString(TYPE_SONG))
.setTitle(getString(R.string.songs))
.setIconUri(Uri.parse("android.resource://" +
"naman14.timber/drawable/ic_empty_music2"))
.setSubtitle(getString(R.string.songs))
.build(), MediaBrowser.MediaItem.FLAG_BROWSABLE
));
mMediaRoot.add(new MediaBrowser.MediaItem(
new MediaDescription.Builder()
.setMediaId(Integer.toString(TYPE_PLAYLIST))
.setTitle(getString(R.string.playlists))
.setIconUri(Uri.parse("android.resource://" +
"naman14.timber/drawable/ic_empty_music2"))
.setSubtitle(getString(R.string.playlists))
.build(), MediaBrowser.MediaItem.FLAG_BROWSABLE
));
}
static View setupView(Activity activity, View convertView, ViewGroup parent,
MediaDescription description, int state) {
if (sColorStateNotPlaying == null || sColorStatePlaying == null) {
initializeColorStateLists(activity);
}
MediaItemViewHolder holder;
Integer cachedState = STATE_INVALID;
if (convertView == null) {
convertView = LayoutInflater.from(activity)
.inflate(R.layout.media_list_item, parent, false);
holder = new MediaItemViewHolder();
holder.mImageView = (ImageView) convertView.findViewById(R.id.play_eq);
holder.mTitleView = (TextView) convertView.findViewById(R.id.title);
holder.mDescriptionView = (TextView) convertView.findViewById(R.id.description);
convertView.setTag(holder);
} else {
holder = (MediaItemViewHolder) convertView.getTag();
cachedState = (Integer) convertView.getTag(R.id.tag_mediaitem_state_cache);
}
holder.mTitleView.setText(description.getTitle());
holder.mDescriptionView.setText(description.getSubtitle());
// If the state of convertView is different, we need to adapt the view to the
// new state.
if (cachedState == null || cachedState != state) {
switch (state) {
case STATE_PLAYABLE:
holder.mImageView.setImageDrawable(
activity.getDrawable(R.drawable.ic_play_arrow_black_36dp));
holder.mImageView.setImageTintList(sColorStateNotPlaying);
holder.mImageView.setVisibility(View.VISIBLE);
break;
case STATE_PLAYING:
AnimationDrawable animation = (AnimationDrawable)
activity.getDrawable(R.drawable.ic_equalizer_white_36dp);
holder.mImageView.setImageDrawable(animation);
holder.mImageView.setImageTintList(sColorStatePlaying);
holder.mImageView.setVisibility(View.VISIBLE);
animation.start();
break;
case STATE_PAUSED:
holder.mImageView.setImageDrawable(
activity.getDrawable(R.drawable.ic_equalizer1_white_36dp));
holder.mImageView.setImageTintList(sColorStateNotPlaying);
holder.mImageView.setVisibility(View.VISIBLE);
break;
default:
holder.mImageView.setVisibility(View.GONE);
}
convertView.setTag(R.id.tag_mediaitem_state_cache, state);
}
return convertView;
}
public void update(MediaMetadata metadata, PlaybackState state, MediaSession.Token token) {
if (state == null || state.getState() == PlaybackState.STATE_STOPPED ||
state.getState() == PlaybackState.STATE_NONE) {
mService.stopForeground(true);
try {
mService.unregisterReceiver(this);
} catch (IllegalArgumentException ex) {
// ignore receiver not registered
}
mService.stopSelf();
return;
}
if (metadata == null) {
return;
}
boolean isPlaying = state.getState() == PlaybackState.STATE_PLAYING;
Notification.Builder notificationBuilder = new Notification.Builder(mService);
MediaDescription description = metadata.getDescription();
notificationBuilder
.setStyle(new Notification.MediaStyle()
.setMediaSession(token)
.setShowActionsInCompactView(0, 1, 2))
.setColor(mService.getApplication().getResources().getColor(R.color.notification_bg))
.setSmallIcon(R.drawable.ic_notification)
.setVisibility(Notification.VISIBILITY_PUBLIC)
.setContentIntent(createContentIntent())
.setContentTitle(description.getTitle())
.setContentText(description.getSubtitle())
.setLargeIcon(MusicLibrary.getAlbumBitmap(mService, description.getMediaId()))
.setOngoing(isPlaying)
.setWhen(isPlaying ? System.currentTimeMillis() - state.getPosition() : 0)
.setShowWhen(isPlaying)
.setUsesChronometer(isPlaying);
// If skip to next action is enabled
if ((state.getActions() & PlaybackState.ACTION_SKIP_TO_PREVIOUS) != 0) {
notificationBuilder.addAction(mPrevAction);
}
notificationBuilder.addAction(isPlaying ? mPauseAction : mPlayAction);
// If skip to prev action is enabled
if ((state.getActions() & PlaybackState.ACTION_SKIP_TO_NEXT) != 0) {
notificationBuilder.addAction(mNextAction);
}
Notification notification = notificationBuilder.build();
if (isPlaying && !mStarted) {
mService.startService(new Intent(mService.getApplicationContext(), MusicService.class));
mService.startForeground(NOTIFICATION_ID, notification);
mStarted = true;
} else {
if (!isPlaying) {
mService.stopForeground(false);
mStarted = false;
}
mNotificationManager.notify(NOTIFICATION_ID, notification);
}
}
static View setupView(Activity activity, View convertView, ViewGroup parent,
MediaDescription description, int state) {
if (sColorStateNotPlaying == null || sColorStatePlaying == null) {
initializeColorStateLists(activity);
}
MediaItemViewHolder holder;
Integer cachedState = STATE_INVALID;
if (convertView == null) {
convertView = LayoutInflater.from(activity)
.inflate(R.layout.media_list_item, parent, false);
holder = new MediaItemViewHolder();
holder.mImageView = (ImageView) convertView.findViewById(R.id.play_eq);
holder.mTitleView = (TextView) convertView.findViewById(R.id.title);
holder.mDescriptionView = (TextView) convertView.findViewById(R.id.description);
convertView.setTag(holder);
} else {
holder = (MediaItemViewHolder) convertView.getTag();
cachedState = (Integer) convertView.getTag(R.id.tag_mediaitem_state_cache);
}
holder.mTitleView.setText(description.getTitle());
holder.mDescriptionView.setText(description.getSubtitle());
// If the state of convertView is different, we need to adapt the view to the
// new state.
if (cachedState == null || cachedState != state) {
switch (state) {
case STATE_PLAYABLE:
holder.mImageView.setImageDrawable(
activity.getDrawable(R.drawable.ic_play_arrow_black_36dp));
holder.mImageView.setImageTintList(sColorStateNotPlaying);
holder.mImageView.setVisibility(View.VISIBLE);
break;
case STATE_PLAYING:
AnimationDrawable animation = (AnimationDrawable)
activity.getDrawable(R.drawable.ic_equalizer_white_36dp);
holder.mImageView.setImageDrawable(animation);
holder.mImageView.setImageTintList(sColorStatePlaying);
holder.mImageView.setVisibility(View.VISIBLE);
animation.start();
break;
case STATE_PAUSED:
holder.mImageView.setImageDrawable(
activity.getDrawable(R.drawable.ic_equalizer1_white_36dp));
holder.mImageView.setImageTintList(sColorStateNotPlaying);
holder.mImageView.setVisibility(View.VISIBLE);
break;
default:
holder.mImageView.setVisibility(View.GONE);
}
convertView.setTag(R.id.tag_mediaitem_state_cache, state);
}
return convertView;
}
static View setupView(Activity activity, View convertView, ViewGroup parent,
MediaDescription description, int state) {
if (sColorStateNotPlaying == null || sColorStatePlaying == null) {
initializeColorStateLists(activity);
}
MediaItemViewHolder holder;
Integer cachedState = STATE_INVALID;
if (convertView == null) {
convertView = LayoutInflater.from(activity)
.inflate(R.layout.media_list_item, parent, false);
holder = new MediaItemViewHolder();
holder.mImageView = (ImageView) convertView.findViewById(R.id.play_eq);
holder.mTitleView = (TextView) convertView.findViewById(R.id.title);
holder.mDescriptionView = (TextView) convertView.findViewById(R.id.description);
convertView.setTag(holder);
} else {
holder = (MediaItemViewHolder) convertView.getTag();
cachedState = (Integer) convertView.getTag(R.id.tag_mediaitem_state_cache);
}
holder.mTitleView.setText(description.getTitle());
holder.mDescriptionView.setText(description.getSubtitle());
// If the state of convertView is different, we need to adapt the view to the
// new state.
if (cachedState == null || cachedState != state) {
switch (state) {
case STATE_PLAYABLE:
holder.mImageView.setImageDrawable(
activity.getDrawable(R.drawable.ic_play_arrow_black_36dp));
holder.mImageView.setImageTintList(sColorStateNotPlaying);
holder.mImageView.setVisibility(View.VISIBLE);
break;
case STATE_PLAYING:
AnimationDrawable animation = (AnimationDrawable)
activity.getDrawable(R.drawable.ic_equalizer_white_36dp);
holder.mImageView.setImageDrawable(animation);
holder.mImageView.setImageTintList(sColorStatePlaying);
holder.mImageView.setVisibility(View.VISIBLE);
animation.start();
break;
case STATE_PAUSED:
holder.mImageView.setImageDrawable(
activity.getDrawable(R.drawable.ic_equalizer1_white_36dp));
holder.mImageView.setImageTintList(sColorStateNotPlaying);
holder.mImageView.setVisibility(View.VISIBLE);
break;
default:
holder.mImageView.setVisibility(View.GONE);
}
convertView.setTag(R.id.tag_mediaitem_state_cache, state);
}
return convertView;
}
public void update(MediaMetadata metadata, PlaybackState state, MediaSession.Token token) {
if (state == null || state.getState() == PlaybackState.STATE_STOPPED ||
state.getState() == PlaybackState.STATE_NONE) {
mService.stopForeground(true);
try {
mService.unregisterReceiver(this);
} catch (IllegalArgumentException ex) {
// ignore receiver not registered
}
mService.stopSelf();
return;
}
if (metadata == null) {
return;
}
boolean isPlaying = state.getState() == PlaybackState.STATE_PLAYING;
Notification.Builder notificationBuilder = new Notification.Builder(mService);
MediaDescription description = metadata.getDescription();
notificationBuilder
.setStyle(new Notification.MediaStyle()
.setMediaSession(token)
.setShowActionsInCompactView(0, 1, 2))
.setColor(mService.getApplication().getResources().getColor(R.color.notification_bg))
.setSmallIcon(R.drawable.ic_notification)
.setVisibility(Notification.VISIBILITY_PUBLIC)
.setContentIntent(createContentIntent())
.setContentTitle(description.getTitle())
.setContentText(description.getSubtitle())
.setLargeIcon(MusicLibrary.getAlbumBitmap(mService, description.getMediaId()))
.setOngoing(isPlaying)
.setWhen(isPlaying ? System.currentTimeMillis() - state.getPosition() : 0)
.setShowWhen(isPlaying)
.setUsesChronometer(isPlaying);
// If skip to next action is enabled
if ((state.getActions() & PlaybackState.ACTION_SKIP_TO_PREVIOUS) != 0) {
notificationBuilder.addAction(mPrevAction);
}
notificationBuilder.addAction(isPlaying ? mPauseAction : mPlayAction);
// If skip to prev action is enabled
if ((state.getActions() & PlaybackState.ACTION_SKIP_TO_NEXT) != 0) {
notificationBuilder.addAction(mNextAction);
}
Notification notification = notificationBuilder.build();
if (isPlaying && !mStarted) {
mService.startService(new Intent(mService.getApplicationContext(), MusicService.class));
mService.startForeground(NOTIFICATION_ID, notification);
mStarted = true;
} else {
if (!isPlaying) {
mService.stopForeground(false);
mStarted = false;
}
mNotificationManager.notify(NOTIFICATION_ID, notification);
}
}
static View setupView(Activity activity, View convertView, ViewGroup parent,
MediaDescription description, int state) {
if (sColorStateNotPlaying == null || sColorStatePlaying == null) {
initializeColorStateLists(activity);
}
MediaItemViewHolder holder;
Integer cachedState = STATE_INVALID;
if (convertView == null) {
convertView = LayoutInflater.from(activity)
.inflate(R.layout.media_list_item, parent, false);
holder = new MediaItemViewHolder();
holder.mImageView = (ImageView) convertView.findViewById(R.id.play_eq);
holder.mTitleView = (TextView) convertView.findViewById(R.id.title);
holder.mDescriptionView = (TextView) convertView.findViewById(R.id.description);
convertView.setTag(holder);
} else {
holder = (MediaItemViewHolder) convertView.getTag();
cachedState = (Integer) convertView.getTag(R.id.tag_mediaitem_state_cache);
}
holder.mTitleView.setText(description.getTitle());
holder.mDescriptionView.setText(description.getSubtitle());
// If the state of convertView is different, we need to adapt the view to the
// new state.
if (cachedState == null || cachedState != state) {
switch (state) {
case STATE_PLAYABLE:
holder.mImageView.setImageDrawable(
activity.getDrawable(R.drawable.ic_play_arrow_black_36dp));
holder.mImageView.setImageTintList(sColorStateNotPlaying);
holder.mImageView.setVisibility(View.VISIBLE);
break;
case STATE_PLAYING:
AnimationDrawable animation = (AnimationDrawable)
activity.getDrawable(R.drawable.ic_equalizer_white_36dp);
holder.mImageView.setImageDrawable(animation);
holder.mImageView.setImageTintList(sColorStatePlaying);
holder.mImageView.setVisibility(View.VISIBLE);
animation.start();
break;
case STATE_PAUSED:
holder.mImageView.setImageDrawable(
activity.getDrawable(R.drawable.ic_equalizer1_white_36dp));
holder.mImageView.setImageTintList(sColorStateNotPlaying);
holder.mImageView.setVisibility(View.VISIBLE);
break;
default:
holder.mImageView.setVisibility(View.GONE);
}
convertView.setTag(R.id.tag_mediaitem_state_cache, state);
}
return convertView;
}