如何在onReceive中獲取給定appWidgetId的removeView

Question

最近，我建立了我的窗口小部件UI，並在onUpdate安裝了click事件處理程序。

我想知道，在onReceive期間，對於給定的appWidgetId ，我訪問remoteView的正確方法是什么？ 正在將所有removeView s存儲在本地成員映射中，例如

Map<appWidgetId, remoteView>

一個好主意？ 還是有更好的方法？

---

import android.app.PendingIntent;
import android.appwidget.AppWidgetManager;
import android.appwidget.AppWidgetProvider;
import android.content.Context;
import android.content.Intent;
import android.widget.RemoteViews;

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

        for (int appWidgetId : appWidgetIds) {
            RemoteViews remoteViews = new RemoteViews(context.getPackageName(), R.layout.widget_layout_inverse_holo_light);

            // Register an onClickListener
            Intent refreshIntent = new Intent(context, JStockAppWidgetProvider.class);
            refreshIntent.setAction(REFRESH_ACTION);
            refreshIntent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_ID, appWidgetId);
            PendingIntent refreshPendingIntent = PendingIntent.getBroadcast(context, 0, refreshIntent, PendingIntent.FLAG_UPDATE_CURRENT);            
            remoteViews.setOnClickPendingIntent(R.id.refresh_button, refreshPendingIntent);

            appWidgetManager.updateAppWidget(appWidgetId, remoteViews);
        }
    }

    @Override
    public void onReceive(Context context, Intent intent) {
        AppWidgetManager mgr = AppWidgetManager.getInstance(context);
        if (intent.getAction().equals(REFRESH_ACTION)) {
            int appWidgetId = intent.getIntExtra(AppWidgetManager.EXTRA_APPWIDGET_ID,
                AppWidgetManager.INVALID_APPWIDGET_ID);

            // How can I access my remoteView?
            // During onUpdate, is saving all the remoteViews in local member
            // Map<appWidgetId, remoteView> a good idea?
        }
        super.onReceive(context, intent);
    }

    private static final String REFRESH_ACTION = "org.yccheok.jstock.gui.widget.JStockAppWidgetProvider.REFRESH_ACTION";  
}

Answer 1

如果要刷新小部件，只需創建一個新的RemoteView，然后調用

appWidgetManager.updateAppWidget

或者，如果您的小部件由某種CursorAdaptor支持，則應實現

RemoteViewsService.RemoteViewsFactory

對適配器的任何更改將自動更新小部件。