单击按钮刷新后如何刷新小部件列表视图？

debugcn 发表于 Dev

夏见

我创建一个Widget使用ListView就可以了。从显示的结果Web Service中ListView是好的。我创建了一个类，这是我的WidgetService延伸到RemoteViewsService和RemoteViewsFactory我打电话给我ListViewProvider说有Web Service。我添加了一个刷新按钮，单击该按钮将WidgetService再次调用该刷新按钮以创建列表视图。

这是我的代码 WidgetProvider

public class WidgetProvider extends AppWidgetProvider {

   @Override
public void onUpdate(Context context, AppWidgetManager appWidgetManager,
                     int[] appWidgetIds) {
 final int N = appWidgetIds.length;
  for (int i = 0; i < N; ++i) {
        RemoteViews remoteViews = updateWidgetListView(context,
                appWidgetIds[i]);
        appWidgetManager.notifyAppWidgetViewDataChanged(appWidgetIds[i], R.id.listViewWidget);
        appWidgetManager.updateAppWidget(appWidgetIds[i], remoteViews);
    }
    super.onUpdate(context, appWidgetManager, appWidgetIds);
}

private RemoteViews updateWidgetListView(Context context, int appWidgetId) {

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

//ListView
    Intent svcIntent = new Intent(context, WidgetService.class);
    svcIntent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_ID, appWidgetId);
    svcIntent.setData(Uri.parse(svcIntent.toUri(Intent.URI_INTENT_SCHEME)));
    remoteViews.setRemoteAdapter(appWidgetId, R.id.listViewWidget, svcIntent);
    remoteViews.setEmptyView(R.id.listViewWidget, R.id.empty_view);

    //REFRESH
    PendingIntent updatePendingIntent = PendingIntent.getService(context, 0, svcIntent, PendingIntent.FLAG_UPDATE_CURRENT);
    remoteViews.setOnClickPendingIntent(R.id.ivRefreshWidget, updatePendingIntent);

 return remoteViews;
}

如您所见，在刷新部分中，我尝试使用PendingIntent来调用，WidgetService但是在测试时不会刷新列表。预先感谢您的帮助。

夏见

在我的onUpdate我设置一个动作，我被称为onReceive，并且也把appWidgetIds在使用以及onReceive

Intent refreshIntent = new Intent(context, WidgetProvider.class);
        refreshIntent.setAction(AppWidgetManager.ACTION_APPWIDGET_UPDATE);
        refreshIntent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_IDS, appWidgetIds);

然后在onReceive我叫onUpdate

if (intent.getAction().equals(AppWidgetManager.ACTION_APPWIDGET_UPDATE)) {
        Bundle extras = intent.getExtras();
        if (extras != null) {
            int[] appWidgetIds = extras.getIntArray(AppWidgetManager.EXTRA_APPWIDGET_IDS);
            if (appWidgetIds != null && appWidgetIds.length > 0) {
                Toast.makeText(context, "REFRESH", Toast.LENGTH_SHORT).show();
                this.onUpdate(context, AppWidgetManager.getInstance(context), appWidgetIds);
            }
        }
    }

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