android - ListView : How to display item selector when rows have clickable widgets?

Question

虽然我很确定这个问题已经解决了一千多次，但我已经为此苦苦挣扎了一段时间。我已经查看了 SO 和其他地方的各种其他类似问题，但我无法解决这个问题。

核心问题是:

When I have clickable components in my list items, if I long-click on a row (for displaying the contextual action bar), the selector for the row does not appear. The long click is triggered though - there just isn't any visual feedback that the long click is happening.

请注意，仅当行布局包含可点击项目时才会出现此问题。这是我已经尝试过的事情的快速 list :

• 在“ListView”上，我已将 drawSelectorOnTop 设置为 true(在 XML 和 getListView() 中都试过了
• 在“ListView”上，我将 choiceMode 设置为 singleChoice(在 XML 和 getListView() 中都试过了
• 在“ListView”上，我将 listSelector 设置为各种值 - 透明、白色等(在 XML 和 getListView() 中都尝试过) .
• 当然，托管列表中各行的 LinearLayout 已将 longClickable 设置为 true。如果没有这个，长点击甚至不会被注册。

无论我做什么，长按列表项都不会显示任何类型的选择器，尽管确实发生了长按并且我确实收到了 OnItemLongClick 回调。

关于可能导致此问题的任何线索？

---

重现问题的代码:

list_item.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:baselineAligned="true"
android:longClickable="true"
android:orientation="horizontal" >

<TextView
    android:id="@+id/tvTitle"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="Large Text"
    android:textAppearance="?android:attr/textAppearanceLarge" />

<Button
    android:id="@+id/btnGo"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_gravity="right"
    android:background="@android:drawable/btn_star_big_on" />

</LinearLayout>

activity_main.xml

<LinearLayout 
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/LinearLayout1"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >

<ListView
    android:id="@android:id/list"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:entries="@array/configurations" >
</ListView>

</LinearLayout>

主 Activity .java

public class MainActivity extends ListActivity {

private ListView mListView;
private Context mContext;
private RowAdapter mAdapter;
private static final String LOG_TAG = "ListViewLongClick";

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    mContext = this;
    mListView = getListView();
    mListView.setChoiceMode(ListView.CHOICE_MODE_SINGLE);
    mListView.setSelector(android.R.color.white);
    mListView.setDrawSelectorOnTop(true);
    mAdapter = new RowAdapter(mContext, R.layout.list_item, R.id.tvTitle,
            getResources().getStringArray(R.array.configurations));
    mListView.setAdapter(mAdapter);
    mListView.setOnItemLongClickListener(new OnItemLongClickListener() {

        public boolean onItemLongClick(AdapterView<?> parent, View view,
                int position, long id) {

            Toast.makeText(mContext, "Long-click on item " + position,
                    Toast.LENGTH_SHORT).show();
            return true;
        }
    });
}

static class RowAdapter extends ArrayAdapter<String> {

    private int mResource;
    private String[] configs;

    public RowAdapter(Context context, int resource,
            int textViewResourceId, String[] objects) {
        super(context, resource, textViewResourceId, objects);
        this.mResource = resource;
        this.configs = objects;

    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        View viewToReturn = convertView;
        if (convertView == null) {
            viewToReturn = LayoutInflater.from(getContext()).inflate(
                    this.mResource, null, false);
        }

        TextView label = (TextView) viewToReturn.findViewById(R.id.tvTitle);
        label.setText(configs[position]);
        Button btn = (Button) viewToReturn.findViewById(R.id.btnGo);
        btn.setOnClickListener(new View.OnClickListener() {

            public void onClick(View v) {
                Log.d(LOG_TAG, "Aha! You clicked on the star button");
            }
        });
        return viewToReturn;
    }

}

}

字符串.xml

<resources>

<string name="app_name">ListViewLongClick</string>
<string name="hello_world">Hello world!</string>
<string name="menu_settings">Settings</string>
<string name="title_activity_main">MainActivity</string>

 <string-array name="configurations">
    <item >Phone-Port</item>
    <item >Phone-Land</item>
    <item >Tab7-Port</item>
    <item >Tab7-Land</item>
    <item >Tab10-Port</item>
    <item >Tab10-Land</item>
</string-array>
</resources>

Answer 1

您应该像这样更改您的 list_items:

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
              android:layout_width="match_parent"
              android:layout_height="match_parent"
              android:baselineAligned="true"
              android:longClickable="true"
              android:orientation="horizontal"
              android:background="@android:drawable/list_selector_background"
        >

    <TextView
            android:id="@+id/tvTitle"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Large Text"
            android:textAppearance="?android:attr/textAppearanceLarge" />

    <Button
            android:id="@+id/btnGo"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="right"
            android:background="@android:drawable/btn_star_big_on" />

</LinearLayout>

我在你的 LinearLayout 中添加了 android:background="@android:drawable/list_selector_background"。

希望这对你有帮助 =)