java 代码
package com.example.bao;
import android.app.Activity;
import android.app.ActionBar;
import android.app.Fragment;
import android.net.wifi.WifiEnterpriseConfig.Eap;
import android.os.Bundle;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AbsListView;
import android.widget.BaseExpandableListAdapter;
import android.widget.ExpandableListView;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.TextView;
import android.os.Build;
public class MainActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//创建一个BaseEXpandableListAdpter对象
BaseExpandableListAdapter ba=new BaseExpandableListAdapter() {
int[] bao=new int[]{
R.drawable.love,
R.drawable.mia,
R.drawable.mia1
};
private String[] love=new String[]
{"love mia","mia","miss mia"};
private String[][] loves=new String[][]{
{"love mia","mia","miss mia","010802"},
{"love mia","mia","miss mia","010802"},
{"love mia","mia","miss mia","010802"}
};
//获取指定组位置，指定列表项处的子列表项数据
@Override
public boolean isChildSelectable(int arg0, int arg1) {
// TODO Auto-generated method stub
return true;
}
@Override
public boolean hasStableIds() {
// TODO Auto-generated method stub
return true;
}
//决定每个组选项的外观
@Override
public View getGroupView(int arg0, boolean arg1, View arg2, ViewGroup arg3) {
// TODO Auto-generated method stub
LinearLayout ll=new LinearLayout(MainActivity.this);
ll.setOrientation(0);
ImageView logo=new ImageView(MainActivity.this);
logo.setImageResource(bao[arg0]);
ll.addView(logo);
TextView tv=getTextView();
tv.setText(getGroup(arg0).toString());
ll.addView(tv);
return ll;
}
@Override
public long getGroupId(int arg0) {
// TODO Auto-generated method stub
return arg0;
}
@Override
public int getGroupCount() {
// TODO Auto-generated method stub
return love.length;
}
//指定组位置处的组数据
@Override
public Object getGroup(int arg0) {
// TODO Auto-generated method stub
return love[arg0];
}
@Override
public int getChildrenCount(int arg0) {
// TODO Auto-generated method stub
return loves[arg0].length;
}
private TextView getTextView(){
//ViewGroup.LayoutParams.MATCH_PARENT ，意思为宽度和父view相同 高度为64
AbsListView.LayoutParams lp=new AbsListView.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT,64);
//这个"this"是指MainActivity本身, 告诉系统这个v只跟MainActivity有关
TextView tv=new TextView(MainActivity.this);
tv.setLayoutParams(lp);
tv.setGravity(Gravity.CENTER_VERTICAL|Gravity.LEFT);
tv.setPadding(36, 0, 0, 0);
tv.setTextSize(20);
return tv;
};
//该方法觉定每个子选项外观
@Override
public View getChildView(int arg0, int arg1, boolean arg2, View arg3,
ViewGroup arg4) {
// TODO Auto-generated method stub
TextView tv=getTextView();
tv.setText(getChild(arg0, arg1).toString());
return tv;
}
@Override
public long getChildId(int arg0, int arg1) {
// TODO Auto-generated method stub
return arg1;
}
//获取指定组位置，指定列表项处的子列表项数据
@Override
public Object getChild(int arg0, int arg1) {
// TODO Auto-generated method stub
return loves[arg0][arg1];
}
};
ExpandableListView elv=(ExpandableListView) findViewById(R.id.list);
elv.setAdapter(ba);
}
}
xml 文件
<?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="vertical" >
<ExpandableListView
android:id="@+id/list"
android:layout_width="wrap_content"
android:layout_height="wrap_content"></ExpandableListView>
</LinearLayout>
效果界面
：
