Android应用程序小部件远程视图不更新

Question

当我从某些活动更新小部件时，列表远程视图不会更新（我的意思是刷新自身）。它一直到应用程序小部件的onUpdate（日志显示）都可以。但是不会进入列表视图的适配器以填充新数据。

public void onUpdate(Context context, AppWidgetManager appWidgetManager,

int[] appWidgetIds) {
    final int N = appWidgetIds.length;
    for (int i = 0; i < N; i++) {
        int appWidgetId = appWidgetIds[i];

        Log.e("called", "onupdate");

        RemoteViews views = new RemoteViews(context.getPackageName(),
                R.layout.widget_lay);

        views.setTextViewText(R.id.textView1,
                "Floating Text will be displayed here .. Daily Thoughts");

        Intent intent = new Intent(context, RemoteServiceEmin.class);
        intent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_ID, appWidgetId);
        views.setRemoteAdapter(R.id.gridview, intent);

        // inflating list remote view

        Intent intentlist = new Intent(context, ListInflater.class);
        intentlist.putExtra(AppWidgetManager.EXTRA_APPWIDGET_ID,
                appWidgetId);
        intent.setData(Uri.parse(intent.toUri(Intent.URI_INTENT_SCHEME)));
        views.setRemoteAdapter(R.id.listview, intentlist);

        // setting onclick on gridview
        Intent itemClickIntent = new Intent(context, MyWidgetProvider.class);
        itemClickIntent.setAction(ITEM_CLICK_ACTION);
        itemClickIntent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_ID,
                appWidgetIds[i]);
        PendingIntent itemClickPendingIntent = PendingIntent.getBroadcast(
                context, 0, itemClickIntent,
                PendingIntent.FLAG_UPDATE_CURRENT);
        views.setPendingIntentTemplate(R.id.gridview,
                itemClickPendingIntent);

        appWidgetManager.updateAppWidget(appWidgetId, views);
    }
    super.onUpdate(context, appWidgetManager, appWidgetIds);

}

- user2660060

Answer 1

终于做完了，再次感谢 developer.android.com。你需要做的就是，在你想要处理“更新”的地方触发广播意图。

Intent initialUpdateIntent = new Intent(
                AppWidgetManager.ACTION_APPWIDGET_UPDATE);
        initialUpdateIntent
                .setAction(AppWidgetManager.ACTION_APPWIDGET_UPDATE);
        sendBroadcast(initialUpdateIntent);

然后在Appwidget的onReceive中捕获它，并使用Remoteview更新

 notifyAppWidgetViewDataChanged(). 

就像下面的代码片段一样

 else if (intent.getAction().equals(
            AppWidgetManager.ACTION_APPWIDGET_UPDATE)) {

         AppWidgetManager appWidgetManager = AppWidgetManager.getInstance(context);

            ComponentName thisAppWidget = new ComponentName(context.getPackageName(), MyWidgetProvider.class.getName());
            int[] appWidgetIds = appWidgetManager.getAppWidgetIds(thisAppWidget);
             appWidgetManager.notifyAppWidgetViewDataChanged(appWidgetIds,  R.id.listviewnew);
           Log.e("finally after a whole day", "working :");  

    }

- user2660060

---

这个方法不稳定：1. AppWidgetProvider 接收广播需要大约 4 秒的时间；2. 有时候，AppWidgetProvider 无法接收广播。请使用以下方法： https://dev59.com/jHA75IYBdhLWcg3wJFYL#7738687 - skyin

除了这个解决方案，我在onDataSetChanged方法中重复了onCreate方法的功能，创建了另一个方法来加载数据并由两个方法共享。 - Armando Peña