单击按钮刷新时如何刷新小部件列表视图？

Question

我正在创建一个带有 ListView 的 Widget。在 ListView 中显示 Web Service 的结果是可以的。我创建了一个 class，它是我的 WidgetService，它延伸到 RemoteViewsService，在 RemoteViewsFactory 上，我称我的 ListViewProvider 为 Web Service。我添加了一个刷新按钮，单击它会再次调用 WidgetService 以创建列表视图。

这是我的 WidgetProvider

中的代码

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;
}

正如您在刷新部分看到的那样，我尝试使用 PendingIntent 来调用 WidgetService 但在测试时它不会刷新列表。提前感谢您的帮助。

Answer 1

arrayList = new ArrayList<AllPostsProvider>();
arrayList.add(all_contents);
AllPostReCyclerViewAdapter = new AllPostReCyclerViewAdapter(arrayList,getApplicationContext());

点击刷新按钮时

 arrayList.clear();
 arrayList = new ArrayList<AllPostsProvider>();
 arrayList.add(all_contents);
AllPostReCyclerViewAdapter = new AllPostReCyclerViewAdapter(arrayList,getApplicationContext());

Answer 2

在我的 onUpdate 中，我设置了一个要在我的 onReceive 中调用的动作，并将 appWidgetIds 也放在 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 我调用 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);
            }
        }
    }

单击按钮刷新时如何刷新小部件列表视图？

How to refresh widget listview when button refresh is clicked?

android

listview

android-widget