Android之ExpandableListView

矫情吗；* 2022-08-21 07:46 155阅读 0赞

### 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 ###

### 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][Android_ExpandableListView_ - Android-Idea - _ - CSDN.NET]

### 完成，效果如下 ###

![这里写图片描述][20160423091143488]

[Android_ExpandableListView_ - Android-Idea - _ - CSDN.NET]: http://blog.csdn.net/cjjky/article/details/6903504
[20160423091143488]: /images/20220724/4dbc8592232b4e069e12a4b2de90ce96.png