这就是我想从我的 AppWidget 中得到的:

1. 配置 Activity 出现，当小部件被添加到屏幕时//到目前为止一切顺利
2. 保存配置后，启动更新小部件的服务//目前为止一切正常
3. 定期安排警报以运行更新小部件的服务。//这里有问题

这真的让我头发花白了，我不知道该怎么办了。如何从服务设置 AppWidget 的更新率？我可以从服务更新小部件，但是当我尝试设置闹钟时，它没有到达 AppWidget 上的 onReceive() 方法。

这是服务更新的代码:

Intent updateWidget = new Intent();
updateWidget.setAction(AppWidgetManager.ACTION_APPWIDGET_UPDATE);
updateWidget.putExtra(AppWidgetManager.EXTRA_APPWIDGET_IDS, new int[]{appWidgetId});
Uri data = Uri.withAppendedPath(Uri.parse(WeatWidgetProvider.URI_SCHEME +
 "://widget/id/"), String.valueOf(appWidgetId));
updateWidget.setData(data);
PendingIntent updatePend = PendingIntent.getBroadcast(this, 0, updateWidget, PendingIntent.FLAG_UPDATE_CURRENT);
AlarmManager alarm = (AlarmManager)getSystemService(ALARM_SERVICE);
alarm.setRepeating(AlarmManager.ELAPSED_REALTIME, SystemClock.elapsedRealtime()+ updateRate, updateRate, updatePend);

在 WidgetProviderClass 的 onreceive() 中:

public void onReceive(Context context, Intent intent){
  super.onReceive(context, intent);
  Log.d("OnReceive", "OnReceive called");
  String action = intent.getAction();
  Log.d("Action", "OnReceive:Action: " + action);
  if(AppWidgetManager.ACTION_APPWIDGET_DELETED.equals(action)){
    int appwidgetId = intent.getExtras().getInt(AppWidgetManager.EXTRA_APPWIDGET_ID, AppWidgetManager.INVALID_APPWIDGET_ID);
    if(appwidgetId != AppWidgetManager.INVALID_APPWIDGET_ID){
      this.onDeleted(context, new int[] {appwidgetId});
    }
  } else if(AppWidgetManager.ACTION_APPWIDGET_UPDATE.equals(action)){
    if(!URI_SCHEME.equals(intent.getScheme())){
      final int[] appWidgetIds = intent.getIntArrayExtra(AppWidgetManager.EXTRA_APPWIDGET_IDS);
      for(int appWidgetId:appWidgetIds){
        SharedPreferences prefs = context.getSharedPreferences(WeatForecastConfigure.WEATHER_PREF_NAME, Context.MODE_PRIVATE);
        update = prefs.getInt(WeatForecastConfigure.REFRESH_UPDATE, -1);
        System.out.println(update);
        if(update != -1){
          Intent widgetUpdate = new Intent();
          widgetUpdate.setAction(AppWidgetManager.ACTION_APPWIDGET_UPDATE);
          widgetUpdate.putExtra(AppWidgetManager.EXTRA_APPWIDGET_IDS, new int[] { appWidgetId });
          // make this pending intent unique by adding a scheme to it
          widgetUpdate.setData(Uri.withAppendedPath(Uri.parse(WeatWidgetProvider.URI_SCHEME +
           "://widget/id/"), String.valueOf(appWidgetId)));
          PendingIntent newPending = PendingIntent.getBroadcast(context.getApplicationContext(), 0, widgetUpdate, PendingIntent.FLAG_UPDATE_CURRENT);
          // schedule the updating
          AlarmManager alarms = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);
          alarms.setRepeating(AlarmManager.ELAPSED_REALTIME,
           SystemClock.elapsedRealtime(), WeatForecastConfigure.convertToMillis(update), newPending);
        }
      }
    }
    super.onReceive(context, intent);
  }else{
    super.onReceive(context, intent);
  }
}

对于 onUpdate() 注释行是故意的。

public void onUpdate(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds){
  Log.d("OnUpdate", "OnUpdate called");
  for (int appWidgetId : appWidgetIds) {
    // context.startService(new Intent(context,WeatService.class));
  }
  //super.onUpdate(context, appWidgetManager, appWidgetIds);
}

请帮忙。我不知道如何设置闹钟更新。无论我是从配置类还是从服务来做，它都不起作用。谢谢。

最佳答案

我认为您需要像这样在您的 Intent 中使用标准的 URI 方案:

intent.setData(Uri.parse(intent.toUri(Intent.URI_INTENT_SCHEME)));

关于android - 从服务定期更新 AppWidget，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/5666311/