Android仿QQ通讯录分组展示ExpandableListView

MyBaseExpandableListAdapter.java

package com.yang.expandablelistviewdemo;

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

import java.util.ArrayList;

/**
 * Created by yang_zzheng on 2016/7/20
 * yangzhizheng2012@163.com
 */
public class MyBaseExpandableListAdapter extends BaseExpandableListAdapter {

    private ArrayList gData;
    private ArrayList<>> iData;
    private Context mContext;

    public MyBaseExpandableListAdapter(ArrayList gData,ArrayList<>> iData, Context mContext) {
        this.gData = gData;
        this.iData = iData;
        this.mContext = mContext;
    }

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

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

    @Override
    public Group getGroup(int groupPosition) {
        return gData.get(groupPosition);
    }

    @Override
    public Item getChild(int groupPosition, int childPosition) {
        return iData.get(groupPosition).get(childPosition);
    }

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

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

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

    //取得用于显示给定分组的视图. 这个方法仅返回分组的视图对象
    @Override
    public View getGroupView(int groupPosition, boolean isExpanded, View convertView, ViewGroup parent) {

        ViewHolderGroup groupHolder;
        if(convertView == null){
            convertView = LayoutInflater.from(mContext).inflate(
                    R.layout.item_exlist_group, parent, false);
            groupHolder = new ViewHolderGroup();
            groupHolder.tv_group_name = (TextView) convertView.findViewById(R.id.tv_group_name);
            convertView.setTag(groupHolder);
        }else{
            groupHolder = (ViewHolderGroup) convertView.getTag();
        }
        groupHolder.tv_group_name.setText(gData.get(groupPosition).getgName());
        return convertView;
    }

    //取得显示给定分组给定子位置的数据用的视图
    @Override
    public View getChildView(int groupPosition, int childPosition, boolean isLastChild, View convertView, ViewGroup parent) {
        ViewHolderItem itemHolder;
        if(convertView == null){
            convertView = LayoutInflater.from(mContext).inflate(
                    R.layout.item_exlist_item, parent, false);
            itemHolder = new ViewHolderItem();
            itemHolder.img_icon = (ImageView) convertView.findViewById(R.id.img_icon);
            itemHolder.tv_name = (TextView) convertView.findViewById(R.id.tv_name);
            convertView.setTag(itemHolder);
        }else{
            itemHolder = (ViewHolderItem) convertView.getTag();
        }
        itemHolder.img_icon.setImageResource(iData.get(groupPosition).get(childPosition).getiId());
        itemHolder.tv_name.setText(iData.get(groupPosition).get(childPosition).getiName());
        return convertView;
    }

    //设置子列表是否可选中
    @Override
    public boolean isChildSelectable(int groupPosition, int childPosition) {
        return true;
    }


    private static class ViewHolderGroup{
        private TextView tv_group_name;
    }

    private static class ViewHolderItem{
        private ImageView img_icon;
        private TextView tv_name;
    }

}

package com.yang.expandablelistviewdemo;

/**
 * Created by yang_zzheng on 2016/7/20
 * yangzhizheng2012@163.com
 */
public class Item {

    private int iId;
    private String iName;

    public Item() {
    }

    public Item(int iId, String iName) {
        this.iId = iId;
        this.iName = iName;
    }

    public int getiId() {
        return iId;
    }

    public String getiName() {
        return iName;
    }

    public void setiId(int iId) {
        this.iId = iId;
    }

    public void setiName(String iName) {
        this.iName = iName;
    }
}

package com.yang.expandablelistviewdemo;
/**
 * Created by yang_zzheng on 2016/7/20
 * yangzhizheng2012@163.com
 */
public class Group {
    private String gName;

    public Group() {
    }

    public Group(String gName) {
        this.gName = gName;
    }

    public String getgName() {
        return gName;
    }

    public void setgName(String gName) {
        this.gName = gName;
    }
}

<code class=" hljs 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:orientation="horizontal"    android:padding="5dp">     <TextView        android:id="@+id/tv_group_name"        android:layout_width="match_parent"        android:layout_height="56dp"        android:gravity="center_vertical"        android:paddingLeft="30dp"        android:text="AP"        android:textStyle="bold"        android:textSize="20sp" /> </LinearLayout></code>

item_exlist_item.xml：code class=" hljs 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:orientation="horizontal"
    android:padding="5dp"
    android:background="#6BBA79">
 
    <ImageView
        android:id="@+id/img_icon"
        android:layout_width="48dp"
        android:layout_height="48dp"
        android:src="@mipmap/iv_lol_icon1"
        android:focusable="false"/>
 
    <TextView
        android:id="@+id/tv_name"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginLeft="15dp"
        android:layout_marginTop="15dp"
        android:focusable="false"
        android:text="提莫"
        android:textSize="18sp" />
 
</LinearLayout></code>