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

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

参考链接 :

完成，效果如下

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