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我使用 AlarmManager 每秒更新一个小部件，但是当添加更多小部件时，仅更新最后一个小部件。我不明白为什么...

这是代码...

public class widget extends AppWidgetProvider {

    @Override
    public void onUpdate(Context context, AppWidgetManager appWidgetManager,int[] appWidgetIds) {
        SharedPreferences preference = context.getSharedPreferences("MY_PREFERENCE", Context.MODE_PRIVATE);
        Intent intent = new Intent(context,vampireServiceWidget.class);
        context.startService(intent);
        for(int i=0; i<appWidgetIds.length;i++){        
            if(preference.getLong("countdown", 0)!=0){
                //Parte il countdown
                Intent in = new Intent().setAction("it.android.dev.thevampirediaries.UPDATE_COUNTDOWN");
                in.putExtra("id_widget", appWidgetIds[i]);
                in.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
                PendingIntent pi = PendingIntent.getBroadcast(context, 0, in, PendingIntent.FLAG_UPDATE_CURRENT);
                AlarmManager alarm = (AlarmManager)context.getSystemService(Context.ALARM_SERVICE);
                alarm.setRepeating(AlarmManager.ELAPSED_REALTIME, SystemClock.elapsedRealtime(), 1000, pi); 

                    }       }

}

进入广播这个代码

    AppWidgetManager manager = AppWidgetManager.getInstance(context);
            RemoteViews remoteView = new RemoteViews(context.getPackageName(),R.layout.widgett);
         thisWidget=intent.getIntExtra("id_widget", 0)
            SimpleTimeFormat tf = new SimpleTimeFormat("$dd$ : $HH$: $mm$: $ss$");    
            String risultato = tf.format(countdown_data_fine - new Date().getTime()); // arg0 tempo
            remoteView.setTextViewText(R.id.textView1, titolo_puntata);
            remoteView.setTextViewText(R.id.textView2, risultato);
            manager.updateAppWidget(thisWidget, remoteView);
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1 回答 1

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注释掉 for 循环，不要发送小部件 ID。使用public void updateAppWidget (ComponentName provider, RemoteViews 视图) 来更新小部件。

试试这个

public class widget extends AppWidgetProvider {

    @Override
    public void onUpdate(Context context, AppWidgetManager appWidgetManager,int[] appWidgetIds) {
        SharedPreferences preference = context.getSharedPreferences("MY_PREFERENCE", Context.MODE_PRIVATE);
        Intent intent = new Intent(context,vampireServiceWidget.class);
        context.startService(intent);
        //for(int i=0; i<appWidgetIds.length;i++){        
            if(preference.getLong("countdown", 0)!=0){
                //Parte il countdown
                Intent in = new   Intent().setAction("it.android.dev.thevampirediaries.UPDATE_COUNTDOWN");
                in.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
                PendingIntent pi = PendingIntent.getBroadcast(context, 0, in, PendingIntent.FLAG_UPDATE_CURRENT);
                AlarmManager alarm = (AlarmManager)context.getSystemService(Context.ALARM_SERVICE);
                alarm.setRepeating(AlarmManager.ELAPSED_REALTIME, SystemClock.elapsedRealtime(), 1000, pi); 

             }     
       }

// }

=================================================

    AppWidgetManager manager = AppWidgetManager.getInstance(context);
                RemoteViews remoteView = new RemoteViews(context.getPackageName(),R.layout.widgett);
ComponentName thisWidget = new ComponentName(context, widget.class);
    SimpleTimeFormat tf = new SimpleTimeFormat("$dd$ : $HH$: $mm$: $ss$");    
                String risultato = tf.format(countdown_data_fine - new Date().getTime());
                remoteView.setTextViewText(R.id.textView1, titolo_puntata);
                remoteView.setTextViewText(R.id.textView2, risultato);
                manager.updateAppWidget(thisWidget, remoteView);
于 2012-04-22T04:30:11.197 回答