如何监听 Xamarin Android 小部件中的项目点击？

Question

问题

我已经实现了此代码AppWidgetListView我尝试附加点击次数。

进展顺利：因此，单击小部件中但位于 ListView 之外的按钮是有效的。您可以在实现 AppWidgetProvider 的类 (WordWidget) 的 OnReceive 方法上看到按钮的单击结果。

什么不起作用：当您从 ListView 单击某个项目（或该项目中的元素）时，它不会显示任何内容。

尝试：

示例 1

Intent configIntent = new Intent(context, typeof(WordWidget));

configIntent.PutExtra("appWidgetId", ids[i]);
PendingIntent configPendingIntent = PendingIntent.GetActivity(context, 0, configIntent, 0);
remoteViews.SetOnClickPendingIntent(Resource.Id.button, configPendingIntent);

示例 2

Intent active = new Intent(context, typeof(WordWidget));
active.SetAction("aaa");
PendingIntent actionPendingIntent = PendingIntent.GetBroadcast(context, 0, active, 0);
remoteViews.SetOnClickPendingIntent(Resource.Id.button, actionPendingIntent);

示例 3

var intent = new Intent(context, typeof(WordWidget));
intent.SetAction(AppWidgetManager.ActionAppwidgetUpdate);
intent.PutExtra(AppWidgetManager.ExtraAppwidgetIds, ids);

var piBackground = PendingIntent.GetBroadcast(context, 0, intent, PendingIntentFlags.UpdateCurrent);
remoteViews.SetOnClickPendingIntent(Resource.Id.button, piBackground);

示例 4

var intent = new Intent(context, typeof(WordWidget));
intent.SetAction("test");
remoteViews.SetOnClickPendingIntent(Resource.Id.button, PendingIntent.GetBroadcast(context, 0, intent, 0));

示例 5

Intent intent = new Intent(Intent.ActionView, Android.Net.Uri.Parse("https://google.com"));

remoteViews.SetOnClickPendingIntent(Resource.Id.button, intent);

---

我尝试用 typeof(MainActivity) 替换 typeof(WordWidget)，但它不起作用。我尝试将这些代码放在 ListProvider 的 public RemoteViews GetViewAt(intposition) 上，其中构建了项目布局，但它不起作用。

Answer 1

作为测试，我实现了如下功能：点击ListView时，进入APP主页面。

可以参考以下代码：

我们需要调用SetOnClickFillInIntent来区分item的点击行为。

在ListProvider.cs中

    public RemoteViews GetViewAt(int position)
    {
        RemoteViews remoteView = new RemoteViews(
         context.PackageName, Resource.Layout.list_row);
        ListItem listItem = listItemList[position];
        remoteView.SetTextViewText(Resource.Id.heading, listItem.heading);
        remoteView.SetTextViewText(Resource.Id.content, listItem.content);

       // add code here 
        Bundle extras = new Bundle();
        extras.PutInt("position", position);
        Intent fillInIntent = new Intent();
        fillInIntent.PutExtras(extras);
        // Make it possible to distinguish the individual on-click
        // action of a given item
        remoteView.SetOnClickFillInIntent(Resource.Id.item_frame, fillInIntent);

        return remoteView;

    }

注意：这里item_frame是list_row.xml的根元素的id

    <?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="horizontal"
    android:id="@+id/item_frame"
    android:background="@android:color/darker_gray" >

在中WidgetProvider.cs

这里，我们在 OnUpdate 方法中设置挂起的意图

    public override void OnUpdate(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds)
    {
        base.OnUpdate(context, appWidgetManager, appWidgetIds);

        int N = appWidgetIds.Length;

        for (int i = 0; i < N; i++)
        {
            RemoteViews remoteViews = updateWidgetListView(context, appWidgetIds[i]);

            // we add code here
            Intent activityIntent = new Intent(context, typeof(MainActivity));
           // activityIntent.SetPackage(context.PackageName);
            // Set the action for the intent.
            // When the user touches a particular view.
            //activityIntent.PutExtra(AppWidgetManager.ExtraAppwidgetId, appWidgetIds[i]);
            //activityIntent.SetData(Android.Net.Uri.Parse(activityIntent.ToUri(Android.Content.IntentUriType.AndroidAppScheme)));
            PendingIntent pendingIntent = PendingIntent.GetActivity(context, appWidgetIds[i], activityIntent, PendingIntentFlags.UpdateCurrent);

            remoteViews.SetPendingIntentTemplate(Resource.Id.listViewWidget, pendingIntent);



            appWidgetManager.UpdateAppWidget(appWidgetIds[i], remoteViews);
        }

    }