Question

我有一个以Service播放音乐的应用。还有一个Widget来控制音乐播放器。一切正常。

现在，在用户关闭应用程序或崩溃后，或者如果我使用System.exit();或getActivity().finish();关闭应用程序，则存在一些问题。一切似乎都运行良好，但不管怎样，即使另一个Activity仍然收到广告，小部件也不会再接收广播。

小部件仍然能够发送广播，它只能接收它们。

有人可以帮帮我吗？

我的小部件中的代码：

public void onUpdate(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds) {

    ma = (GlobalSongList)context.getApplicationContext();

    context.getApplicationContext().registerReceiver(broadcastCoverReceiver, new IntentFilter(Music_service.BROADCAST_COVER));

    context.getApplicationContext().registerReceiver(broadcastPlayPause, new IntentFilter(BROADCAST_PLAYPAUSE));
    context.getApplicationContext().registerReceiver(checkagain, new IntentFilter("xyz"));
    context.getApplicationContext().registerReceiver(intentshuttingdown, new IntentFilter("shutdown"));

    RemoteViews controlButtons = new RemoteViews(context.getPackageName(),R.layout.widget);

    Intent playIntent = new Intent(BROADCAST_PLAYPAUSE);
    PendingIntent playPendingIntent = PendingIntent.getBroadcast(context, REQUEST_CODE, playIntent, PendingIntent.FLAG_UPDATE_CURRENT);
    controlButtons.setOnClickPendingIntent(R.id.bPlay, playPendingIntent);


    Intent previousIntent = new Intent(why);
    PendingIntent previousPendingIntent = PendingIntent.getBroadcast(context, REQUEST_CODE, previousIntent, PendingIntent.FLAG_UPDATE_CURRENT);
    controlButtons.setOnClickPendingIntent(R.id.bprev, previousPendingIntent);

    if(ma.NP_List.size()>0) {
        controlButtons.setTextViewText(R.id.song, ma.NP_List.get(ma.position).song);
        controlButtons.setTextViewText(R.id.artist, ma.NP_List.get(ma.position).getArtist());

        Intent open_activityIntent = new Intent(BROADCAST_open_activity);
        PendingIntent openactivityPendingIntent = PendingIntent.getBroadcast(context, REQUEST_CODE, open_activityIntent, PendingIntent.FLAG_UPDATE_CURRENT);
        controlButtons.setOnClickPendingIntent(R.id.parent, openactivityPendingIntent);

        if(ma.boolMusicPlaying1 == true) {
            controlButtons.setImageViewResource(R.id.bPlay, R.drawable.pause2);
        } else {
            controlButtons.setImageViewResource(R.id.bPlay, R.drawable.play);
        }
    } else if(ma.NP_List.size() == 0) {
        controlButtons.setTextViewText(R.id.song, "");
        controlButtons.setTextViewText(R.id.artist,  "");
    }

    Intent nextIntent     = new Intent(BROADCAST_SWAP);
    nextIntent.putExtra("nextprev", 1);

    PendingIntent nextPendingIntent = PendingIntent.getBroadcast(context, 0, nextIntent, PendingIntent.FLAG_UPDATE_CURRENT);
    controlButtons.setOnClickPendingIntent(R.id.bNext, nextPendingIntent);

    appWidgetManager.updateAppWidget(appWidgetIds, controlButtons);
}

public BroadcastReceiver broadcastCoverReceiver = new BroadcastReceiver() {

    @Override
    public void onReceive(Context context, Intent serviceIntent) {
        AppWidgetManager appWidgetManager = AppWidgetManager.getInstance(context.getApplicationContext());
        ComponentName thisWidget = new ComponentName(context.getApplicationContext(), MyWidget.class);
        int[] appWidgetIds = appWidgetManager.getAppWidgetIds(thisWidget);
        if (appWidgetIds != null && appWidgetIds.length > 0) {
            onUpdate(context, appWidgetManager, appWidgetIds);
        }
    }
};

Answer 1

你应该使用Android应用程序小部件，而不是使用广播，因为它是最常规的做法....这也在文档中提到

Answer 2

您应该在活动中bind和unbind分别提供onResume和onPause后台服务。

访问Android Activity and Service relationship - after Pause, after Stop以了解服务与活动之间的关系

应用程序崩溃或用户杀死应用程序后，小组件停止接收数据？

2 个答案: