android - 如何将 onClick 监听器附加到应用程序小部件上的 ListView 项

Question

我喜欢为我的 ListView 的每个项目添加一个 onClick 监听器，但我尝试过的没有任何效果。

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;
    }
}

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>

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>

如果我点击一个项目，什么都不会发生。

Intent 正常工作，如果我将它直接卡在提供程序中的 ListView ，但我不能再滚动并且不能响应单个项目。

Answer 1

的部分为单个项目添加行为 在 official doc说:

As described in Using the AppWidgetProvider Class, you normally use setOnClickPendingIntent() to set an object's click behavior—such as to cause a button to launch an Activity. But this approach is not allowed for child views in an individual collection item (to clarify, you could use setOnClickPendingIntent() to set up a global button in the Gmail app widget that launches the app, for example, but not on the individual list items). Instead, to add click behavior to individual items in a collection, you use setOnClickFillInIntent(). This entails setting up up a pending intent template for your collection view, and then setting a fill-in intent on each item in the collection via your RemoteViewsFactory.

Your RemoteViewsFactory must set a fill-in intent on each item in the collection. This makes it possible to distinguish the individual on-click action of a given item. The fill-in intent is then combined with the PendingIntent template in order to determine the final intent that will be executed when the item is clicked.

您需要调用setOnClickFillInIntent以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;
    }

还有setPendingIntentTemplate应该使用而不是 setOnClickPendingIntent设置单个 PendingIntent集合上的模板。在 onUpdate 中设置待定 Intent 对应于 AppWidgetProvider 的子类的方法，像这样:

@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);
    }