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我对此列表视图中的项目有疑问。正常行为是当用户点击一个项目时，背景颜色变为橙色。我的应用程序没有发生这种情况，我不知道为什么。

main.xml 只有一个：

<android.support.v4.view.ViewPager
        android:id="@+id/pager"
        android:layout_width="fill_parent"
        android:layout_height="0dp"
        android:layout_weight="1" />

片段的 xml 只有一个：

<ListView
        android:id="@android:id/list"
        style="@style/MyListView"
        android:layout_width="match_parent"
        android:layout_height="match_parent" >
    </ListView>

我在 listView 项中膨胀的视图是：

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:clickable="true"
    android:focusable="true"
    android:focusableInTouchMode="true" >

    <ImageView
        android:id="@+id/imageView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_alignParentTop="true"
        android:clickable="false"
        android:focusable="false"
        android:focusableInTouchMode="false"
        android:src="@drawable/ic_launcher" />

    <TextView
        android:id="@+id/textViewName"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true"
        android:layout_marginLeft="5dp"
        android:layout_toRightOf="@+id/imageView1"
        android:clickable="false"
        android:focusable="false"
        android:focusableInTouchMode="false"
        android:text=""
        android:textAppearance="?android:attr/textAppearanceMedium" />

    <TextView
        android:id="@+id/textView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignBottom="@+id/imageView1"
        android:layout_alignLeft="@+id/textViewName"
        android:clickable="false"
        android:focusable="false"
        android:focusableInTouchMode="false"
        android:text=""
        android:textAppearance="?android:attr/textAppearanceMedium" />

    <ImageView
        android:id="@+id/imageView2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentRight="true"
        android:layout_alignParentTop="true"
        android:layout_marginRight="10dp"
        android:clickable="false"
        android:focusable="false"
        android:focusableInTouchMode="false"
        android:src="@drawable/bottom_arrow" />

</RelativeLayout>

我为 ListView 定义的样式是：

<style name="MyListView" parent="@android:style/Widget.ListView.White">
        <item name="android:listSelector">@drawable/list_subject_selector</item>
        <item name="android:cacheColorHint">@android:color/transparent</item>
        <item name="android:background">@drawable/list_subject_selector</item>
    </style>

list_subject_selector drawable 是：

<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <!-- touch down -->
    <item android:drawable="@drawable/list_subject_focused" android:state_pressed="true"/>
    <!-- selected -->
    <item android:drawable="@drawable/list_subject_unfocused" android:state_focused="false" android:state_pressed="false" android:state_selected="true"/>
</selector>

我不知道为什么会这样……我正在使用 Android ICS 进行测试。

有任何想法吗？

谢谢大家，费利佩

更新 1 这是 ListFragment 代码：

public class MyFragment extends ListFragment {
    private ListAdaptor adapter;
    private InternalDB db;
    Context mContext;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        mContext = getActivity();
        db = new InternalDB(getActivity());
    }

    @Override
    public void onActivityCreated(Bundle savedInstanceState) {
        super.onActivityCreated(savedInstanceState);

        ArrayList<EventVO> listVO = db.getSummaryEvents(true);
        adapter = new ListAdaptor(mContext, R.layout.event_inflate, listVO);
        setListAdapter(adapter);            
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        LinearLayout rl = (LinearLayout) inflater.inflate(R.layout.general_list, container, false);
        return rl;
    }

    private class ListAdaptor extends ArrayAdapter<EventVO> {
        private ArrayList<EventVO> listVO;

        public ListAdaptor(Context context, int textViewResourceId, ArrayList<EventVO> items) {
            super(context, textViewResourceId, items);
            this.listVO = items;
        }

        @Override
        public View getView(int position, View convertView, ViewGroup parent) {
            View v = convertView;
            if (v == null) {
                v = ViewGroup.inflate(getContext(), R.layout.event_inflate, null);
            }
            final EventVO o = listVO.get(position);
            TextView fullName = (TextView) v.findViewById(R.id.textViewName);
            fullName.setText(o.getUserName());

            //removed part of the code for brevity

            v.setOnClickListener(new OnClickListener() {
                @Override
                public void onClick(View arg0) {
                    Intent i = new Intent(mContext, EventDetailsActivity.class);
                    i.putExtra("USER_ID", o.getUserId());                       
                    startActivity(i);
                }
            });
            return v;
        }
    }
}

更新 2 现在可以工作了！那很烦人。我这样做是为了让它工作：

我用来膨胀的 xml 文件有：

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:clickable="true"
        android:focusable="true"
        android:focusableInTouchMode="true" >

我改为：

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent">

但是，我认为真正做出改变的是：在 onActivityCreated() 内部

list = getListView();
        list.setOnItemClickListener(new OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> arg0, View arg1, int arg2, long arg3) {
                ListAdaptor la = (ListAdaptor)arg0.getAdapter();
                EventVO vo = la.getItem(arg2);
                Intent i = new Intent(mContext, EventDetailsActivity.class);
                i.putExtra("USER_ID", vo.getUserId());
                i.putExtra("IS_BORROWED", true);
                startActivity(i);
            }

重要的是行list = getListView(); 我没有通过这段代码获得 ListView。我在 onCreateView() 方法中使用 findViewById 获取 listView。我想我失去了与真实 ListView 对象的链接。

感谢所有帮助过我的人！:)

费利佩});

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2 回答 2

2

尝试更改您的列表选择器。目前，仅当 ListView 中的项目未聚焦或按下并被选中时，才使用第二个可绘制对象。我真的不明白您希望选择器的外观"@drawable/list_selector_unfocused"如何，但如果您希望列表选择器看起来正常，只需删除所有其他属性，这意味着仅在按下项目时"@drawable/list_selector_focused"才会使用。

<selector xmlns:android="http://schemas.android.com/apk/res/android">
<!-- touch down -->
<item android:drawable="@drawable/list_subject_focused" android:state_pressed="true"/>
<!-- selected -->
<item android:drawable="@drawable/list_subject_unfocused" />

于 2012-05-28T16:27:57.237 回答
1

I found that when I was adding ListView layouts to pure Fragments you would loose a lot of the freebies the old ListActivity and such provided in the background. I would suggest that you change away from using a pure Fragment to using a ListFragment and you can watch all that awesomeness come back with no need to play about with selector drawables.

The 'Swell' and 'Tide' tabs in our application are both ListFragments within a ViewPager and look like this;

ListFragment within a pager with highlighting (original ICS is a bit darker than shown here)

于 2012-05-28T15:25:23.440 回答