如何将 onClick 侦听器附加到应用小部件上的列表视图项

Woo*_*iee 4 android listview android-appwidget

我喜欢向我的列表视图的每个项目添加一个 onClick 侦听器,但我尝试过的一切都不起作用。

这是我的 RemoteViewsFactory:

public class MyRemoteViewsFactory implements RemoteViewsService.RemoteViewsFactory {

    [...]

    public RemoteViews getViewAt(int position) {

        final RemoteViews remoteView = new RemoteViews(
            context.getPackageName(), R.layout.widget_item);

        [...]

        final Intent activityIntent = new Intent(context, ListActivity.class);
        activityIntent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_ID, appWidgetId);
        activityIntent.putExtra(AppWidgetManager.ACTION_APPWIDGET_PICK, position);
        PendingIntent pI = PendingIntent.getActivity(
            context, appWidgetId, activityIntent, PendingIntent.FLAG_UPDATE_CURRENT);

        remoteView.setOnClickPendingIntent(R.id.item_frame, pI);

        return remoteView;
    }
}
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列表小部件.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/widget_frame"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_gravity="center_vertical" >

    <include layout="@layout/picture_frame" />

    <ListView
        android:id="@+id/list_view"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_toRightOf="@+id/picframe"
        android:layout_margin="5dp"
        android:gravity="center"
        android:loopViews="true" />

</RelativeLayout>
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列表项.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/item_frame"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:orientation="horizontal"
    android:gravity="center_horizontal"
    android:layout_centerVertical="true" >

    <TextView
        android:id="@+id/date"
        style="@style/WidgetItemText" />

    <TextView
        android:id="@+id/name"
        style="@style/WidgetItemText" />

</LinearLayout>
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如果我单击一个项目,则什么也不会发生。

意图正常工作,如果我将它直接挂在提供者中的列表视图中,但是我无法再滚动并且无法响应单个项目。

leo*_*rdo 8

的部分添加行为,个别项目官方文档说:

如使用 AppWidgetProvider 类中所述,您通常使用 setOnClickPendingIntent() 来设置对象的单击行为,例如使按钮启动 Activity。但是这种方法不允许用于单个集合项中的子视图(澄清一下,您可以使用 setOnClickPendingIntent() 在启动应用程序的 Gmail 应用程序小部件中设置全局按钮,例如,但不能在单个列表项上)。相反,要将单击行为添加到集合中的单个项目,请使用 setOnClickFillInIntent()。这需要为您的集合视图设置一个待定的意图模板,然后通过您的 RemoteViewsFactory 为集合中的每个项目设置一个填充意图。

您的 RemoteViewsFactory 必须为集合中的每个项目设置填充意图。这使得区分给定项目的单个点击操作成为可能。然后将填充意图与 PendingIntent 模板相结合,以确定单击项目时将执行的最终意图。

您需要调用setOnClickFillInIntent来区分项目的点击行为。像这样的东西:

public RemoteViews getViewAt(int position) {

        final RemoteViews remoteView = new RemoteViews(
            context.getPackageName(), R.layout.widget_item);

        [...]

        // Next, set a fill-intent, which will be used to fill in the pending intent template
        // that is set on the collection view in StackWidgetProvider.
        Bundle extras = new Bundle();
        extras.putInt(YouWidgetProvider.EXTRA_ITEM, position);
        Intent fillInIntent = new Intent();
        fillInIntent.putExtras(extras);
        // Make it possible to distinguish the individual on-click
        // action of a given item
        remoteView.setOnClickFillInIntent(R.id.item_frame, fillInIntent);


        return remoteView;
    }
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setPendingIntentTemplate应该使用而不是setOnClickPendingIntent在集合上设置单个PendingIntent模板。在onUpdate与您的子类相对应的方法中设置挂起的意图AppWidgetProvider,如下所示:

@Override
public void onUpdate(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds) {
        // update each of the app widgets with the remote adapter
        for (int i = 0; i < appWidgetIds.length; ++i) {
            ...
            RemoteViews remoteView = new RemoteViews(context.getPackageName(), 
                R.layout.widget_item);
            ...

            // This section makes it possible for items to have individualized behavior.
            // It does this by setting up a pending intent template. Individuals items of a collection
            // cannot set up their own pending intents. Instead, the collection as a whole sets
            // up a pending intent template, and the individual items set a fillInIntent
            // to create unique behavior on an item-by-item basis.
            Intent activityIntent = new Intent(context, ListActivity.class);
            // Set the action for the intent.
            // When the user touches a particular view.
            activityIntent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_ID, appWidgetIds[i]);
            activityIntent.setData(Uri.parse(intent.toUri(Intent.URI_INTENT_SCHEME)));
            PendingIntent pendingIntent = PendingIntent.getActivity(context, appWidgetIds[i], 
                activityIntent, PendingIntent.FLAG_UPDATE_CURRENT);
            remoteView.setPendingIntentTemplate(R.id.stack_view, pendingIntent);

            appWidgetManager.updateAppWidget(appWidgetIds[i], remoteView);
        }
        super.onUpdate(context, appWidgetManager, appWidgetIds);
    }
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