android-从应用程序向小部件发送数据

我被困在一个特殊的场景中.用户从应用程序更新时间后,我需要立即更新我的小部件.我确实通过发送Intent Extras数据来尝试广播,但是没有这样做.当前,我的数据存储在AppWidgetProvider中,我需要将此数据发送到服务

公共类CountdownWidget扩展了AppWidgetProvider {
    // SharedPreferences userDefaults;

// update rate in milliseconds
public static final int UPDATE_RATE = 1800000; // 30 minute

public static String nameOne = "";

@Override
public void onDeleted(Context context, int[] appWidgetIds) {
    for (int appWidgetId : appWidgetIds) {
        setAlarm(context, appWidgetId, -1);
    }
    super.onDeleted(context, appWidgetIds);
}

@Override
public void onReceive(Context context, Intent intent) {
    // TODO Auto-generated method stub

    Bundle extras = intent.getExtras();
    nameOne = extras.getString("NAME_ONE");

    Log.e("Name: ", nameOne);

    super.onReceive(context, intent);
}

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

    for (int appWidgetId : appWidgetIds) {
        setAlarm(context, appWidgetId, UPDATE_RATE);
    }
    super.onUpdate(context, appWidgetManager, appWidgetIds);
}

public static void setAlarm(Context context, int appWidgetId, int updateRate) {

    // Log.e("", "Updating Widget Service");

    PendingIntent newPending = makeControlPendingIntent(context,
            CountdownService.UPDATE, appWidgetId);
    AlarmManager alarms = (AlarmManager) context
            .getSystemService(Context.ALARM_SERVICE);
    if (updateRate >= 0) {
        alarms.setRepeating(AlarmManager.ELAPSED_REALTIME,
                SystemClock.elapsedRealtime(), updateRate, newPending);
    } else {
        // on a negative updateRate stop the refreshing
        alarms.cancel(newPending);
    }
}

public static PendingIntent makeControlPendingIntent(Context context,
        String command, int appWidgetId) {
    Intent active = new Intent(context, CountdownService.class);
    active.setAction(command);
    active.putExtra(AppWidgetManager.EXTRA_APPWIDGET_ID, appWidgetId);
    // this Uri data is to make the PendingIntent unique, so it wont be
    // updated by FLAG_UPDATE_CURRENT
    // so if there are multiple widget instances they wont override each
    // other
    Uri data = Uri.withAppendedPath(
            Uri.parse("countdownwidget://widget/id/#" + command
                    + appWidgetId), String.valueOf(appWidgetId));
    active.setData(data);
    return (PendingIntent.getService(context, 0, active,
            PendingIntent.FLAG_UPDATE_CURRENT));
}

}

如您所见,nameOne是一个静态变量.我可以使用getExtras在onReceive方法上接收数据,但是我无法将这些数据传递给CountdownService服务.

我确实尝试了CountdownWidget.nameOne,但仍然无法满足服务中的数据要求.

任何帮助将不胜感激.

解决方法:

您必须创建一个更新小部件的服务,选中this tutorial(第4部分),您可以尝试通过静态变量传输数据.

标签：android,android-widget,android-preferences
来源： https://codeday.me/bug/20191012/1900557.html