如何在单击父行中的项目时在可展开列表视图中获取父行位置？

Question

我正在使用ExpandableListView。我在视图中有四个项目。这是列表父行的xml文件。

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:id="@+id/saved_tank_mixes_parent_row"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:background="@color/white"
    android:padding="@dimen/layout_margin" >

    <com.lht.textview.LHTTextView
        android:id="@+id/saved_mix_name_textview"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textColor="@color/brown_for_text"
        android:textSize="16sp"
        app:fontFamily="helveticaltstdlight.ttf" />

    <com.lht.textview.LHTTextView
        android:id="@+id/saved_mix_time_textview"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@id/saved_mix_name_textview"
        android:layout_marginLeft="1dp"
        android:text="Saved 15 mins ago"
        android:textColor="@color/gray_extra_lite"
        android:textSize="12sp"
        app:fontFamily="helveticaltstdlightcond.ttf" />

    <ImageView
        android:id="@+id/detail_icon"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentRight="true"
        android:layout_centerVertical="true"
        android:background="@drawable/detail_button"
        android:contentDescription="@string/app_name" />

    <Button
        android:id="@+id/cross_button"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentRight="true"
        android:layout_centerVertical="true"
        android:onClick="onDeleteSavedMixClick"
        android:background="@drawable/cross_button_selector"
        android:visibility="gone" />

</RelativeLayout>

最后一个按钮（此处为十字按钮）用于从列表视图中删除项目。

当我点击这个十字按钮时，我想得到列表行的位置。我尝试实现onGroupClickListener来获取位置，但它不起作用。请帮帮我。

以下是我的自定义适配器的代码。

package com.lht.precisionlabs.mixtank.savedrecipe;

import java.util.ArrayList;
import java.util.HashMap;

import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseExpandableListAdapter;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.RelativeLayout;
import android.widget.TextView;

import com.lht.precisionlabs.mixtank.R;

public class MyExpandableListAdapter extends BaseExpandableListAdapter{

    private Context mContext;
    private ArrayList<HashMap<String, Object>> listViewDataItem;
    private boolean isDeleteButtonVisible=false;

    public MyExpandableListAdapter(Context context,ArrayList<HashMap<String, Object>> listViewDataSource)
    {
        this.mContext=context;
        this.listViewDataItem=listViewDataSource;
    }

    public void setDeleteButtonVisibility(boolean isVisible)
    {
        this.isDeleteButtonVisible=isVisible;
    }

    public ArrayList<HashMap<String, Object>> getDataSource()
    {
        return listViewDataItem;
    }

    @Override
    public Object getChild(int groupPosition, int childPosition) {
        // TODO Auto-generated method stub
        return null;
    }

    @Override
    public long getChildId(int groupPosition, int childPosition) {
        // TODO Auto-generated method stub
        return childPosition;
    }

    @Override
    public View getChildView(int groupPosition, int childPosition,
            boolean isLastChild, View convertView, ViewGroup parent) {
        // TODO Auto-generated method stub
        if(convertView==null)
        {
             LayoutInflater inflater = (LayoutInflater) mContext.getSystemService( Context.LAYOUT_INFLATER_SERVICE );
                convertView = inflater.inflate(R.layout.saved_tank_mix_child_row_layout, parent,false);
        }
        return convertView;
    }

    @Override
    public int getChildrenCount(int groupPosition) {
        // TODO Auto-generated method stub
        return 1;
    }

    @Override
    public Object getGroup(int groupPosition) {
        // TODO Auto-generated method stub
        return listViewDataItem.get(groupPosition);
    }

    @Override
    public int getGroupCount() {
        // TODO Auto-generated method stub
        return listViewDataItem.size();
    }

    @Override
    public long getGroupId(int groupPosition) {
        // TODO Auto-generated method stub
        return groupPosition;
    }

    @Override
    public View getGroupView(int groupPosition, boolean isExpanded,
            View convertView, ViewGroup parent) {
        // TODO Auto-generated method stub
        if(convertView == null)
        {
            LayoutInflater inflater = (LayoutInflater) mContext.getSystemService( Context.LAYOUT_INFLATER_SERVICE );
            convertView = inflater.inflate(R.layout.saved_tank_mixes_base_row,parent,false);
        }
        setDataOnView(convertView,groupPosition,isExpanded);
        return convertView;
    }

    @Override
    public boolean hasStableIds() {
        // TODO Auto-generated method stub
        return false;
    }

    @Override
    public boolean isChildSelectable(int groupPosition, int childPosition) {
        // TODO Auto-generated method stub
        return false;
    }

    private void setDataOnView(View view,int groupPosition,boolean isExpanded)
    {
        RelativeLayout relativeLayout=(RelativeLayout)view;
        TextView textView=(TextView)relativeLayout.findViewById(R.id.saved_mix_name_textview);
        textView.setText((String)(listViewDataItem.get(groupPosition).get(mContext.getResources().getString(R.string.mix_name_key))));
        textView=(TextView)relativeLayout.findViewById(R.id.saved_mix_time_textview);
        textView.setText((String)(listViewDataItem.get(groupPosition).get(mContext.getResources().getString(R.string.mix_date_key))));
        ImageView detailIcon=(ImageView)relativeLayout.findViewById(R.id.detail_icon);
        Button deleteButton=(Button)relativeLayout.findViewById(R.id.cross_button);
        if(isDeleteButtonVisible)
        {
            deleteButton.setVisibility(View.VISIBLE);
            detailIcon.setVisibility(View.GONE);
        }
        else
        {
            deleteButton.setVisibility(View.GONE);
            if(isExpanded)
                detailIcon.setVisibility(View.GONE);
            else
                detailIcon.setVisibility(View.VISIBLE);
        }   
    }
}