我正在尝试为我的音乐播放器创建一个小部件。窗口小部件布局由三个imageButtons和一个ImageView组成。这三个按钮执行以下任务：跳到下一首歌曲，播放/暂停歌曲，跳到上一首歌曲。现在我想要的是当我点击跳到上一首歌曲按钮/跳到下一首歌曲按钮时，我希望按钮发送广播以及用当前歌曲专辑艺术更新ImageView。
我的问题：按下按钮时，按钮执行单个功能。我希望他们执行多种功能。
private PendingIntent getArtUpdatePendingIntent(Context context, int appWidgetId){
Intent intentUpdate = new Intent(context, getClass());
intentUpdate.setAction(AppWidgetManager.ACTION_APPWIDGET_UPDATE);
int[] idArray = new int[]{appWidgetId};
intentUpdate.putExtra(AppWidgetManager.EXTRA_APPWIDGET_IDS, idArray);
PendingIntent pendingUpdate = PendingIntent.getBroadcast(context, appWidgetId, intentUpdate, PendingIntent.FLAG_UPDATE_CURRENT);
return pendingUpdate;
}
上面的代码有助于在点击按钮时更新ImageView。但后来我无法发送广播。
代码：
private static final String previousSongOnClick = "previousSongOnClick";
private static final String playPauseSongOnClick = "playPauseSongOnClick";
private static final String nextSongOnClick = "nextSongOnClick";
private StorageUtil storageUtil;
void updateAppWidget(final Context context, final AppWidgetManager appWidgetManager,
final int appWidgetId) {
Log.e("Widget","UpdateAppWidget");
// Construct the RemoteViews object
final RemoteViews remoteViews = new RemoteViews(context.getPackageName(), R.layout.musicana_widget);
storageUtil = new StorageUtil(context);//storageUtil.loadAudio().get(storageUtil.loadAudioIndex()).getAlbumIDArtwork()
remoteViews.setOnClickPendingIntent(R.id.previousSongButton, getPendingSelfIntent(context, previousSongOnClick,appWidgetId));
remoteViews.setOnClickPendingIntent(R.id.playPauseButton, getPendingSelfIntent(context, playPauseSongOnClick,appWidgetId));
remoteViews.setOnClickPendingIntent(R.id.nextSongButton,getPendingSelfIntent(context, nextSongOnClick,appWidgetId));
Glide.with(context).asBitmap()
.load(storageUtil.loadAudio().get(storageUtil.loadAudioIndex()).getAlbumIDArtwork())
.into(new SimpleTarget<Bitmap>() {
@Override
public void onResourceReady(@NonNull Bitmap resource, @Nullable Transition<? super Bitmap> transition) {
remoteViews.setImageViewBitmap(R.id.albumArt,resource);
appWidgetManager.updateAppWidget(appWidgetId, remoteViews);
Log.e("Widget","Inside glide");
}
});
// Instruct the widget manager to update the widget
}
@Override
public void onUpdate(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds) {
Log.e("Widget","onUpdate");
// There may be multiple widgets active, so update all of them
for (int appWidgetId : appWidgetIds) {
updateAppWidget(context, appWidgetManager, appWidgetId);
}
}
@Override
public void onEnabled(Context context) {
// Enter relevant functionality for when the first widget is created
}
@Override
public void onDisabled(Context context) {
// Enter relevant functionality for when the last widget is disabled
}
@Override
public void onReceive(final Context context, Intent intent) {
super.onReceive(context, intent);
if (intent.getAction().equals(previousSongOnClick)) {
Log.e("Widget", "previous Song button clicked");
context.sendBroadcast(new Intent(ConstantsForBroadCast.ACTION_PLAY_PREVIOUS));
updateAppWidget(context,AppWidgetManager.getInstance(context),R.id.albumArt);
} else if (intent.getAction().equals(playPauseSongOnClick)) {
Log.e("Widget", "play/pause Song button clicked");
} else if (intent.getAction().equals(nextSongOnClick)) {
Log.e("Widget", "next Song button clicked");
context.sendBroadcast(new Intent(ConstantsForBroadCast.ACTION_PLAY_NEXT));
updateAppWidget(context,AppWidgetManager.getInstance(context),R.id.albumArt);
}
else if (intent.getAction().equals(AppWidgetManager.ACTION_APPWIDGET_UPDATE)) {
Log.e("Widget", "Album art changing");
}
}
protected PendingIntent getPendingSelfIntent(Context context, String action, int appWidgetId) {
Intent intent = new Intent(context, getClass());
intent.setAction(action);
return PendingIntent.getBroadcast(context, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT);
}