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
