Android之ExpandableListView

ExpandableListView可以用来表现多层级的listView，本文主要是ExpandableListView的一个简单实现

布局文件

<LinearLayout 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:orientation="vertical">
   <LinearLayout
       android:layout_height="50dip"
       android:layout_width="match_parent"
       android:background="#297DC6">
       <TextView
           android:layout_marginLeft="100dip"
           android:layout_height="wrap_content"
           android:layout_width="wrap_content"
           android:text="Email"
           android:textColor="#ffffff"
           android:textSize="20sp"
           android:layout_gravity="center_vertical"/>
   </LinearLayout>
   <ExpandableListView
       android:id="@+id/list"
       android:layout_height="match_parent"
       android:layout_width="match_parent"/>

</LinearLayout>

MainActivity实现

package com.zj.expandandview;

import android.annotation.SuppressLint;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseExpandableListAdapter;
import android.widget.ExpandableListView;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.ExpandableListView.OnChildClickListener;
import android.widget.ExpandableListView.OnGroupClickListener;

public class MainActivity extends Activity {

    private ExpandableListView expendView;
    private int []group_click=new int[5];

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

        final MyExpendAdapter adapter=new MyExpendAdapter();

        expendView=(ExpandableListView) findViewById(R.id.list);
        expendView.setGroupIndicator(null);  //设置默认图标不显示
        expendView.setAdapter(adapter);

        //一级点击事件
        expendView.setOnGroupClickListener(new OnGroupClickListener() {
            @Override
            public boolean onGroupClick(ExpandableListView parent, View v,
                    int groupPosition, long id) {

                group_click[groupPosition]+=1;
                adapter.notifyDataSetChanged();
                return false;
            }
        });

        //二级点击事件
        expendView.setOnChildClickListener(new OnChildClickListener() {
            @Override
            public boolean onChildClick(ExpandableListView parent, View v,
                    int groupPosition, int childPosition, long id) {
                //可在这里做点击事件
                if(groupPosition==0&&childPosition==1){

                }else if(groupPosition==0&&childPosition==0){
                    //Intent intent=new Intent(MainActivity.this, MailConstactsActivity.class);
                    //startActivity(intent);
                }else if(groupPosition==1&&childPosition==0){
                    //Intent intent=new Intent(MainActivity.this, MailEditActivity.class);
                    //startActivity(intent);
                }else if(groupPosition==1&&childPosition==1){
                    //Intent intent=new Intent(MainActivity.this, MailCaogaoxiangActivity.class);
                    //startActivity(intent);
                }else if(groupPosition==2&&childPosition==0){

                }else if(groupPosition==2&&childPosition==1){
                    //Intent intent=new Intent(MainActivity.this, MailBoxActivity.class);
                    //intent.putExtra("TYPE", "INBOX");
                    //intent.putExtra("status", 1);//未读
                    //startActivity(intent);
                }else if(groupPosition==2&&childPosition==2){
                    //Intent intent=new Intent(MainActivity.this, MailBoxActivity.class);
                    //intent.putExtra("TYPE", "INBOX");
                    //intent.putExtra("status", 2);//已读
                    //startActivity(intent);
                }
                adapter.notifyDataSetChanged();
                return false;
            }
        });

    }

    /**
     * 适配器
     * @author Administrator
     *
     */
    private class MyExpendAdapter extends BaseExpandableListAdapter{

        /**
         * pic state
         */
        //int []group_state=new int[]{R.drawable.group_right,R.drawable.group_down};

        /**
         * group title
         */
        String []group_title=new String[]{"联系人","写邮件","收件箱"};

        /**
         * child text
         */
        String [][] child_text=new String [][]{
                {"联系人列表","添加联系人"},
                {"新邮件","草稿箱"},
                {"全部邮件","未读邮件","已读邮件"},};
        int [][] child_icons=new int[][]{
                {R.drawable.listlianxiren,R.drawable.tianjia},
                {R.drawable.xieyoujian,R.drawable.caogaoxiang},
                {R.drawable.all,R.drawable.notread,R.drawable.hasread},
        };

        /**
         * 获取一级标签中二级标签的内容
         */
        @Override
        public Object getChild(int groupPosition, int childPosition) {
            return child_text[groupPosition][childPosition];
        }

        /**
         * 获取二级标签ID
         */
        @Override
        public long getChildId(int groupPosition, int childPosition) {
            return childPosition;
        }
        /**
         * 对一级标签下的二级标签进行设置
         */
        @SuppressLint("SimpleDateFormat")
        @Override
        public View getChildView(int groupPosition, int childPosition,
                boolean isLastChild, View convertView, ViewGroup parent) {
            convertView=getLayoutInflater().inflate(R.layout.email_child, null);
            TextView tv=(TextView) convertView.findViewById(R.id.tv);
            tv.setText(child_text[groupPosition][childPosition]);

            ImageView iv=(ImageView) convertView.findViewById(R.id.child_icon);
            iv.setImageResource(child_icons[groupPosition][childPosition]);
            return convertView;
        }

        /**
         * 一级标签下二级标签的数量
         */
        @Override
        public int getChildrenCount(int groupPosition) {
            return child_text[groupPosition].length;
        }

        /**
         * 获取一级标签内容
         */
        @Override
        public Object getGroup(int groupPosition) {
            return group_title[groupPosition];
        }

        /**
         * 一级标签总数
         */
        @Override
        public int getGroupCount() {
            return group_title.length;
        }

        /**
         * 一级标签ID
         */
        @Override
        public long getGroupId(int groupPosition) {
            return groupPosition;
        }
        /**
         * 对一级标签进行设置
         */
        @Override
        public View getGroupView(int groupPosition, boolean isExpanded,
                View convertView, ViewGroup parent) {
            convertView=getLayoutInflater().inflate(R.layout.email_group, null);

            ImageView icon=(ImageView) convertView.findViewById(R.id.icon);
            ImageView iv=(ImageView) convertView.findViewById(R.id.iv);
            TextView tv=(TextView) convertView.findViewById(R.id.iv_title);

            iv.setImageResource(R.drawable.group_right);
            tv.setText(group_title[groupPosition]);

            if(groupPosition==0){
                icon.setImageResource(R.drawable.constants);
            }else if(groupPosition==1){
                icon.setImageResource(R.drawable.mailto);
            }else if(groupPosition==2){
                icon.setImageResource(R.drawable.mailbox);
            }

            if(group_click[groupPosition]%2==0){
                iv.setImageResource(R.drawable.group_right);
            }else{
                iv.setImageResource(R.drawable.group_down);
            }

            return convertView;
        }
        /**
         * 指定位置相应的组视图
         */
        @Override
        public boolean hasStableIds() {
            return true;
        }

        /**
         *  当选择子节点的时候，调用该方法
         */
        @Override
        public boolean isChildSelectable(int groupPosition, int childPosition) {
            return true;
        }

    }
}

参考链接 :

Android中ExpandableListView控件基本使用 - Android-Idea - 博客频道 - CSDN.NET

完成，效果如下