Android ExpandableListView和onChildClick无法正常工作

我已经阅读了很多与我有相同问题的线程，但是我不知道发生了什么。我有一个可扩展的列表视图，但无法使onChildClickListener正常工作。onGroupClickListener运行正常，但我真的不需要它。我看了很多例子，它们似乎都是我的。这是代码：

import android.app.Activity;
import android.app.ExpandableListActivity;
import android.content.Context;
import android.os.Bundle;
import android.util.Log;
import android.view.Menu;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ExpandableListView;
import android.widget.ExpandableListView.OnChildClickListener;
import android.widget.ExpandableListView.OnGroupClickListener;
import android.widget.ListView;
import android.widget.Toast;

import org.ektorp.CouchDbConnector;
import org.ektorp.DbAccessException;
import org.ektorp.android.util.EktorpAsyncTask;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;



import android.widget.TextView;



public class MainActivity extends Activity {
 super.onCreate(savedInstanceState);

 setContentView(R.layout.activity_main);

 EktorpAsyncTask getUsersTask = new EktorpAsyncTask() {


            @Override
            protected void doInBackground() {
                //here i connect to de BD and fill the Group and Children arrays                
            }


@Override
                protected void onSuccess() {

                UserArrayExpandableAdapter adapter = new UserArrayExpandableAdapter(getApplicationContext(),parentsChilds.getParents(), parentsChilds.getChilds());
ExpandableListView expandableList = (ExpandableListView) findViewById(R.id.userview);
                expandableList.setAdapter(adapter);
                expandableList.setClickable(true);

                expandableList.setOnGroupClickListener(new OnGroupClickListener(){
                     @Override
                        public boolean onGroupClick(ExpandableListView arg0, View arg1,
                            int groupPosition, long arg3) {
                            return false;
                            }
                });

                expandableList.setOnChildClickListener(new OnChildClickListener()
                  {
                      @Override
                      public boolean onChildClick(ExpandableListView arg0, View arg1, int arg2, int arg3, long arg4)
                      {
                          Toast.makeText(getBaseContext(), "Child clicked", Toast.LENGTH_LONG).show();
                          return false;
                      }
                  });

子视图：

<?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:layout_marginTop="10dp"
android:orientation="vertical" 
android:clickable="true"
android:focusable="true">


<TextView
    android:id="@+id/day"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:background="@color/DarkSeaGreen"
    android:paddingLeft="8dp"
    android:paddingBottom="4dp"
    android:textColor="@color/White"
    android:textSize="18sp"
    android:textStyle="bold" />

<RelativeLayout
    android:layout_width="fill_parent"
    android:layout_height="?android:attr/listPreferredItemHeight"
    android:padding="6dip" 
    android:clickable="true"
    android:focusable="true">

    <TextView
        android:id="@+id/subject"
        android:layout_width="fill_parent"
        android:layout_height="26dip"
        android:layout_alignParentBottom="true"
        android:layout_alignParentRight="true"
        android:ellipsize="marquee"
        android:singleLine="true"
        android:textSize="12sp" />

    <TextView
        android:id="@+id/name"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentRight="true"
        android:layout_alignParentTop="true"
        android:layout_alignWithParentIfMissing="true"
        android:gravity="center_vertical"
        android:textStyle="bold" 
        android:textSize="16sp" />
</RelativeLayout>

</LinearLayout>

组布局：

<?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="fill_parent"
android:orientation="vertical"
android:paddingBottom="5dp" >

<TextView
    android:id="@+id/monthText"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:gravity="center"
    android:textSize="26sp"
    android:background="@color/SkyBlue"
    android:textColor="@color/White"
    android:textStyle="bold" />

</LinearLayout>

MainActivity布局：

<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:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context=".LoginActivity" >

<LinearLayout
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:orientation="vertical" >

    <ExpandableListView
        android:id="@+id/userview"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" >
    </ExpandableListView>



</RelativeLayout>

适配器代码：

public class UserArrayExpandableAdapter extends BaseExpandableListAdapter {
private final Context context;
private final ArrayList<ArrayList<EventVO>> childs;
private ArrayList<String> parents;

public UserArrayExpandableAdapter(Context context, ArrayList<String> parents,ArrayList<ArrayList<EventVO>> childs) {
    this.context = context;
    this.childs = childs;
    this.parents = parents;
}

@Override
public Object getChild(int arg0, int arg1) {
    return childs.get(arg0).get(arg1);
}

@Override
public long getChildId(int groupPosition, int childPosition) {
    return childPosition;
}

@Override
public View getChildView(int groupPosition, int childPosition,
        boolean isLastChild, View convertView, ViewGroup parent) {
    List<EventVO> child = (ArrayList<EventVO>) childs.get(groupPosition);


    if (convertView == null){
        LayoutInflater inflater = (LayoutInflater) context
                .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
       convertView = inflater.inflate(R.layout.user_view, parent, false);
    }
    TextView nameView = (TextView) convertView.findViewById(R.id.name);
    TextView dateView = (TextView) convertView.findViewById(R.id.day);
    TextView subjectView = (TextView) convertView.findViewById(R.id.subject);
    nameView.setText(child.get(childPosition).getName());
    String day = child.get(childPosition).getDate();
    day = DateTransformer.getDay(day);
    dateView.setText(day);
    subjectView.setText(child.get(childPosition).getSubject());
        return convertView;
}

@Override
public int getChildrenCount(int groupPosition) {
    return childs.get(groupPosition).size();
}

@Override
public Object getGroup(int groupPosition) {
    return parents.get(groupPosition);
}

@Override
public int getGroupCount() {
    return parents.size();
}

@Override
public long getGroupId(int groupPosition) {
    return groupPosition;
}

@Override
public View getGroupView(int groupPosition, boolean isExpanded,
        View convertView, ViewGroup parent) {

    if (convertView==null) {
        LayoutInflater inflater = (LayoutInflater) context
                .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
       convertView = inflater.inflate(R.layout.parent_view, parent, false); 
    }
    TextView monthView = (TextView) convertView.findViewById(R.id.monthText);
    monthView.setText(parents.get(groupPosition));
    return convertView;
}

@Override
public boolean hasStableIds() {
    return true;
}

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


}

非常感谢你。