在 LinearLayout 中获取 onItemClick 实现的位置

getting the position onItemClick implementation in LinearLayout

我正在尝试显示一个 ListView 和我的 Java class extendsListFragment。在 ListItem 上设置 setOnItemClickListener 时,点击监听器似乎不起作用。这是我的代码:

ListView_rssfeeds_tab.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:id="@+id/relativeLayout"
    tools:context=".interestingReads.RSSFeedsTab">
    <ListView
        android:id="@+id/rssFeedsFragment"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:background="@color/diffBackgroundWhite"
        />

</RelativeLayout>

rss_item_list_row.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/rssFeeds_LL_list_view"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:layout_marginTop="12dp"
    android:layout_marginBottom="12dp"
    android:orientation="vertical"
    android:clickable="true"
    >
<LinearLayout

    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="horizontal"
    android:padding="6dp"
    >

    <ImageView
        android:id="@+id/rssFeeds_Image_list_view"
        android:layout_width="60dp"
        android:layout_height="60dp"
        android:contentDescription="@string/app_name"
        android:padding="0dp" />

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical"
        android:padding="7dp">

        <TextView
            android:id="@+id/rssFeeds_Title_list_view"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:textSize="13sp"
            android:textStyle="bold" />

        <TextView
            android:id="@+id/rssFeeds_Description_list_view"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:paddingTop="5dp"
            android:textSize="12sp" />
    </LinearLayout>
</LinearLayout>
</LinearLayout>

RSSFeedsTab.java(请注意:RSSFeedsTab 是片段而不是 Activity)

public class RSSFeedsTab extends ListFragment implements  OnItemClickListener {
.
.
.
@Override
    public void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);
.
.
.
}

@Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
.
.
.
        SimpleAdapter simpleAdapter = new SimpleAdapter(getActivity().getBaseContext(), aList, R.layout.rss_item_list_row, from, to);
        setListAdapter(simpleAdapter);

        View RootView =  getActivity().getLayoutInflater().inflate(R.layout.fragment_rssfeeds_tab, container, false);
        ListView RSSFeedsItemLL = (ListView) RootView.findViewById(R.id.rssFeedsFragment);




        RSSFeedsItemLL.setOnItemClickListener(new OnItemClickListener() {

            public void onItemClick(AdapterView<?> adapter, View v, int position, long id) {
                System.out.println("********Reached onClick*********");
                Toast.makeText(getActivity(), "Item: " + position, Toast.LENGTH_SHORT).show();
            }
        });
        return super.onCreateView(inflater, container, savedInstanceState);


    }

通过这么多的实现,我能够获得 ListView rssFeeds_LL_list_view。我不确定,如何在那些 ListView 上使用点击事件,以便我可以在 ListView 中获得 position

您必须使用侦听器 OnItemClickListener 来获取被单击的项目: OnItemClickListener on Android developer

****更新****

在您的代码中,您使用的是已包含 Listview 的 ListFragment。

SimpleAdapter simpleAdapter = new SimpleAdapter(getActivity().getBaseContext(), aList, R.layout.rss_item_list_row, from, to);
setListAdapter(simpleAdapter);

通过这一行,您可以创建一个适配器并将此适配器提供给 Fragment 的 ListView。然后从布局中恢复 RSSFeedsItemLL ListView 并在其上设置 OnItemClickListener :

ListView RSSFeedsItemLL = (ListView) RootView.findViewById(R.id.rssFeedsFragment);
RSSFeedsItemLL.setOnItemClickListener(new AdapterView.OnItemClickListener(){...}

但是此 ListView 从未链接到适配器。

您有两个解决方案:

  • 用 class 定义中的 Fragment 替换 ListFragment,并在布局文件中使用 ListView

  • 在片段中使用 RSSFeedsItemLL ListView

对于第二种情况,您只需覆盖 RSSFeedsTab 中的 onListItemClick 方法 class :

@Override
public void onListItemClick(ListView l, View v, int position, long id) {
    System.out.println("********Reached onClick*********");
    Toast.makeText(getActivity(), "Item: " + position, Toast.LENGTH_SHORT).show();
    super.onListItemClick(l, v, position, id);
}

您还必须删除 rss_item_list_row.xml 中的 LinearLayout 定义中的行 android:clickable="true" :

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/rssFeeds_LL_list_view"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginTop="12dp"
android:layout_marginBottom="12dp"
android:orientation="vertical"
>
<LinearLayout

    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="horizontal"
    android:padding="6dp"
    >
    ...

在 ListView 视图上使用 onItemClickListenerRSSFeedsItemLL

RSSFeedsItemLL.setOnItemClickListener(new OnItemClickListener() {
   public void onItemClick(AdapterView<?> adapter, View v, int position, long id) {
      System.out.println("********Reached onClick*********");
      Toast.makeText(getActivity(), "Item: " + position, Toast.LENGTH_SHORT).show();
}});

参考:OnItemClickListener

最后我用overriding方法解决了这个问题getView()

所以,我只更改了一行: SimpleAdapter simpleAdapter = new SimpleAdapter(getActivity().getBaseContext(), aList, R.layout.rss_item_list_row, from, to);

SimpleAdapter simpleAdapter = new SimpleAdapter(getActivity().getBaseContext(), aList, R.layout.rss_item_list_row, from, to){
    @Override
    public View getView (int position, View convertView, ViewGroup parent)
    {
        View v = super.getView(position, convertView, parent);
        final int finalposition = position;
        LinearLayout RSSFeed_singleItem=(LinearLayout) v.findViewById(R.id.rssFeeds_LL_list_view);
        RSSFeed_singleItem.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View arg0) {
                // TODO Auto-generated method stub
                Toast.makeText(getActivity(),"Link:==>"+localLinkArray[finalposition],Toast.LENGTH_SHORT).show();
            }
        });
        return v;
    }
};