远程视图更新问题

Question

我从用户那里获取数据并存储到数据库中。我的数据库只有一个值。因此，每次用户进入数据库时​​，数据库都会更新。我在AppWidget的文本视图中显示这些数据。我使用此代码：

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

    //Get all ids
    ComponentName thisWidget = new ComponentName(context.getPackageName(),SmsSchedulerWidget.class.getName());

    int[] allWidgetIds = appWidgetManager.getAppWidgetIds(thisWidget);


    //the datas to be shown are fetched from the database
    DatabaseManager dbManager = new DatabaseManager(context);
    dbManager.open();
    contactNumber = dbManager.fetchContactNumber();
    Log.i("contactNumber",contactNumber);
    date = dbManager.fetchDate();
    Log.i("date",date);
    message = dbManager.fetchMessage();
    Log.i("message",message);
    status = dbManager.fetchStatus();
    Log.i("status", status);
    dbManager.closeDatabase();
    //Build the intent to call the service

    //it creates the UI for the given app widget
    RemoteViews remoteViews = new RemoteViews(context.getPackageName(),R.layout.schdulesms_appwidget_layout);


    remoteViews.setTextViewText(R.id.to_appwidget_saved_data,
            contactNumber);
    remoteViews.setTextViewText(R.id.date_appwidget_saved_data, date);
    remoteViews.setTextViewText(R.id.status_appwidget_saved, status);
    remoteViews.setTextViewText(R.id.message_appwidgset_saved_data,
            message);

    //to start the activity with the click on the layout
    Intent clickIntent = new Intent(context.getApplicationContext(),MainActivity.class);
    clickIntent.setFlags(clickIntent.FLAG_ACTIVITY_NEW_TASK);
    PendingIntent pendingIntent= PendingIntent.getActivity(context, 0, clickIntent, 0);
    remoteViews.setOnClickPendingIntent(R.id.full_widget, pendingIntent);

    //to update the BroadCast Receiver so that it holds the current values in the layout
    Intent updateIntent =new Intent(context,SmsSchedulerWidget.class);

    updateIntent.setAction(AppWidgetManager.ACTION_APPWIDGET_UPDATE);
    updateIntent.setComponent(thisWidget);

    PendingIntent pendingIntentForUpdate = PendingIntent.getBroadcast(context, 0, updateIntent, PendingIntent.FLAG_UPDATE_CURRENT);
    remoteViews.setOnClickPendingIntent(R.id.logoBtn, pendingIntentForUpdate);

    appWidgetManager.updateAppWidget(thisWidget, remoteViews);

    }

我的应用小部件应该在按钮单击后自动更新，并且用户在运行时已将新值输入到数据库中。但是应用小部件仅在从屏幕上卸载appwidget然后再次安装或者再次安装后自行更新该程序重新运行。为什么会发生这种情况？单击按钮?????

后如何更新我的应用小部件

Answer 1

要手动更新AppWidget，您必须先发送Broadcast，然后使用AppWidgetProvider的{​​{1}}方法接收onReceive()。从onReceive()开始，您应该从广播Intent中提取所需的所有值，然后手动调用onUpdate()方法。希望这会有所帮助。