Question

我有一个带有 3个不同按钮的小部件，它包含了我从数据库中获取的一些值。

当在主应用程序中更新数据库时，我需要窗口小部件中的按钮从我的数据库中获取更新的值，然后显示它们。

我想在主应用程序中调用onStop时在按钮上调用更新，但我无法弄清楚如何执行此操作

任何建议都将受到赞赏：）

@Override
protected void onStop()
{ 
 //main application

    .super.onStop();
    WidgetProvider.updateMyWidgets(null, null); // does obviously not work as i dont have Context or Parcelable to send with it
    dblose();
}

public static void updateMyWidget(Context context, Parcelable data) 
{
    AppWidgetManager man = AppWidgetManager.getInstance(context);
    int[] ids = man.getAppWidgetIds(  new ComponentName(context, WidgetProvider.class));
    Intent updateIntent = new Intent();
    updateIntent.setAction(AppWidgetManager.ACTION_APPWIDGET_UPDATE);
    updateIntent.putExtra(WidgetProvider.ACTION_WIDGET_BUTTON1, data);
    updateIntent.putExtra(WidgetProvider.ACTION_WIDGET_BUTTON2, data);
    updateIntent.putExtra(WidgetProvider.ACTION_WIDGET_BUTTON3, data);
    context.sendBroadcast(updateIntent);
}

@Override
public void onUpdate(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds)
{
    Log.w("no.reaving", "onUpdate method called");
    getTimeFromDatabase();

    RemoteViews remoteViews = new RemoteViews(context.getPackageName(), R.layout.widget_layout);

    Intent active = new Intent(context, WidgetProvider.class);
    active.setAction(ACTION_WIDGET_BUTTON1);
    PendingIntent actionPendingIntent = PendingIntent.getBroadcast(context, 1, active, PendingIntent.FLAG_CANCEL_CURRENT);
    remoteViews.setOnClickPendingIntent(R.id.btnTimerWidget1, actionPendingIntent);

    active = new Intent(context, WidgetProvider.class);
    active.setAction(ACTION_WIDGET_BUTTON2);
    actionPendingIntent = PendingIntent.getBroadcast(context, 2, active, PendingIntent.FLAG_CANCEL_CURRENT);
    remoteViews.setOnClickPendingIntent(R.id.btnTimerWidget2, actionPendingIntent);

    active = new Intent(context, WidgetProvider.class);
    active.setAction(ACTION_WIDGET_BUTTON3);
    actionPendingIntent = PendingIntent.getBroadcast(context, 3, active, PendingIntent.FLAG_CANCEL_CURRENT);
    remoteViews.setOnClickPendingIntent(R.id.btnTimerWidget3, actionPendingIntent);

   // Set the text with the current time.
   remoteViews.setTextViewText(R.id.btnTimerWidget1, TESTSTRING1 + " Hrs");
   remoteViews.setTextViewText(R.id.btnTimerWidget2, TESTSTRING2 + " Hrs");
   remoteViews.setTextViewText(R.id.btnTimerWidget3, TESTSTRING3 + " Hrs");

   appWidgetManager.updateAppWidget(appWidgetIds, remoteViews);
}


@Override
public void onReceive(Context context, Intent intent) 
{
    WidgetProvider.context = context;
    db = new DatabaseHandler(context);
    getTimeFromDatabase();

    if (intent.getAction().equals(ACTION_WIDGET_BUTTON1)) {
        newAlarm(TESTSTRING1);
        showToast(TESTSTRING1);
    } else if (intent.getAction().equals(ACTION_WIDGET_BUTTON2)) {
        newAlarm(TESTSTRING2);
        showToast(TESTSTRING2);
    } else if (intent.getAction().equals(ACTION_WIDGET_BUTTON3)) {
        newAlarm(TESTSTRING3);
        showToast(TESTSTRING3);
    } else {
        super.onReceive(context, intent);
    }
}

Answer 1

AppWidgetProvider extends BroadcastReceiver所以当值更新时，您可以向AppWidgetProvider实现发送意图

修改在您的主要应用程序中而不是

WidgetProvider.updateMyWidgets(null, null);

您向WidgetProvider发送视频广播，并在onReceive方法中实施更新

如果可以帮助您，请参阅此project

主应用程序中的小部件更新按钮值

1 个答案: