android - ExpandableListView 子点击监听器未触发

Question

不知道为什么我的 onChildClick 没有触发。一切正常，除了当其中一个子项目被点击时，绝对没有任何反应。否则，可扩展组将按预期工作。

我已将此追溯到我在子 xml 文件中对复选框的使用。当我删除此复选框时，onChildClick 会按预期触发。但是我需要这个复选框来实现这个 Activity 的功能。我做错了什么？谢谢!

public class MySettings extends Activity {

    private ExpandListAdapter expAdapter;
    private ArrayList<ExpandListGroup> expListItems;
    private ExpandableListView expandableList;
    private String client;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_my_settings);

        expandableList = (ExpandableListView) findViewById(R.id.expandable_list);
        expListItems = SetStandardGroups();  //works fine - can show code if needed
        expAdapter = new ExpandListAdapter(MySettings.this, expListItems);
        expandableList.setAdapter(expAdapter);

        expandableList.setOnChildClickListener(new ExpandableListView.OnChildClickListener() {

            @Override
            public boolean onChildClick(ExpandableListView parent, View v, int groupPosition, int childPosition, long id) {
                //Nothing here ever fires
                System.err.println("child clicked");
                Toast.makeText(getApplicationContext(), "child clicked", Toast.LENGTH_SHORT).show();
                return true;
            }
        });

    }

这里是 xml 文件:

activity_my_settings.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="fill_parent"
    android:layout_height="fill_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    android:background="@drawable/background" >

    <ImageView
        android:id="@+id/logo"
        android:layout_marginTop="5dip"
        android:layout_alignParentTop="true"
        android:layout_width="wrap_content"
        android:layout_height="70dp"
        android:layout_gravity="left"
        android:contentDescription="@string/blank"
        android:src="@raw/logo" >
    </ImageView>

    <TextView
        android:id="@+id/my_settings"
        android:textColor="#000000"
        android:layout_below="@id/logo"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="10dp"
        android:gravity="center"
        android:text="@string/my_settings"
        android:textSize="30sp"
        android:textStyle="bold" />

    <LinearLayout
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:layout_below="@id/my_settings" >

        <ExpandableListView
            android:id="@+id/expandable_list"
            android:scrollingCache="false"
            android:layout_marginTop="20dip"
            android:layout_height="wrap_content"
            android:layout_width="match_parent" />

    </LinearLayout>

</RelativeLayout>

expandlist_group_item.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="55dip"
    android:background="#FF7C7C7C" >

    <TextView
        android:id="@+id/group_header"
        android:layout_marginLeft="40dp"
        android:layout_width="fill_parent"
        android:layout_height="40dp"
        android:gravity="center_vertical"
        android:textColor="#000000"
        android:textSize="22sp" />

</LinearLayout>

expandlist_child_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="55dip"
    android:orientation="horizontal" >

    <CheckBox
        android:id="@+id/check_box"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />

    <TextView
        android:id="@+id/expand_list_item"
        android:paddingLeft="10dp"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:textSize="@dimen/smart_finder_settings_font_size"
        android:textColor="#FFFFFF" />

</LinearLayout>

Answer 1

请务必覆盖可扩展列表适配器的 isChildSelectable 方法并返回 true，如下所示:

public class MyExpandableListAdapter extends BaseExpandableListAdapter {
...

@Override
public boolean isChildSelectable(int groupPosition, int childPosition) {
    return true;
}
...
}