关于ExpandableListView用法的一个简单小例子

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喜欢显示好友QQ那样的列表，可以展开，可以收起，在android中，以往用的比较多的是listview，虽然可以实现列表的展示，但在某些情况下，我们还是希望用到可以分组并实现收缩的列表，那就要用到android的ExpandableListView，今天研究了一下这个的用法，也参考了很多资料动手写了一个小demo，实现了基本的功能，但界面优化方面做得还不够好，有待改进，素材采用了Q版三国杀武将的图片，很有爱哈哈，下面直接上效果图以及源代码~！







main.xml的布局很简单啦，只是一个ExpandableListView 就OK了

但值得简单说下的是 android:cacheColorHint="#00000000"，这个设置可以去除拖动view时背景变成黑色的效果

android:listSelector="#00000000" ，可以去除选中时的黄色底色

1 <?xml version="1.0" encoding="utf-8"?>

2 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

3 android:layout_width="fill_parent"

4 android:layout_height="fill_parent"

5 android:orientation="vertical" >

6 <ExpandableListView

7 android:id="@+id/list"

8 android:layout_width="fill_parent"

9 android:layout_height="fill_parent"

10 android:background="#ffffff"

11 android:cacheColorHint="#00000000"

12 android:listSelector="#00000000"

13 >

14 </ExpandableListView>

15 </LinearLayout>

16

java代码：

package com.eyu.activity_test;

import android.app.Activity;

import android.graphics.Color;

import android.os.Bundle;

import android.view.Gravity;

import android.view.View;

import android.view.ViewGroup;

import android.view.Window;

import android.widget.AbsListView;

import android.widget.BaseExpandableListAdapter;

import android.widget.ExpandableListAdapter;

import android.widget.ExpandableListView;

import android.widget.ExpandableListView.OnChildClickListener;

import android.widget.ImageView;

import android.widget.LinearLayout;

import android.widget.TextView;

import android.widget.Toast;

public class ExpandableList extends Activity{

protected void onCreate(Bundle savedInstanceState) {

// TODO Auto-generated method stub

super.onCreate(savedInstanceState);

requestWindowFeature(Window.FEATURE_NO_TITLE);

setContentView(R.layout.main);

final ExpandableListAdapter adapter = new BaseExpandableListAdapter() {

//设置组视图的图片

int[] logos = new int[] { R.drawable.wei, R.drawable.shu,R.drawable.wu};

//设置组视图的显示文字

private String[] generalsTypes = new String[] { "魏", "蜀", "吴" };

//子视图显示文字

private String[][] generals = new String[][] {

{ "夏侯惇", "甄姬", "许褚", "郭嘉", "司马懿", "杨修" },

{ "马超", "张飞", "刘备", "诸葛亮", "黄月英", "赵云" },

{ "吕蒙", "陆逊", "孙权", "周瑜", "孙尚香" }

};

//子视图图片

public int[][] generallogos = new int[][] {

{ R.drawable.xiahoudun, R.drawable.zhenji,

R.drawable.xuchu, R.drawable.guojia,

R.drawable.simayi, R.drawable.yangxiu },

{ R.drawable.machao, R.drawable.zhangfei,

R.drawable.liubei, R.drawable.zhugeliang,

R.drawable.huangyueying, R.drawable.zhaoyun },

{ R.drawable.lvmeng, R.drawable.luxun, R.drawable.sunquan,

R.drawable.zhouyu, R.drawable.sunshangxiang } };

//自己定义一个获得文字信息的方法

TextView getTextView() {

AbsListView.LayoutParams lp = new AbsListView.LayoutParams(

ViewGroup.LayoutParams.FILL_PARENT, 64);

TextView textView = new TextView(

ExpandableList.this);

textView.setLayoutParams(lp);

textView.setGravity(Gravity.CENTER_VERTICAL);

textView.setPadding(36, 0, 0, 0);

textView.setTextSize(20);

textView.setTextColor(Color.BLACK);

return textView;

}

//重写ExpandableListAdapter中的各个方法

@Override

public int getGroupCount() {

// TODO Auto-generated method stub

return generalsTypes.length;

}

@Override

public Object getGroup(int groupPosition) {

// TODO Auto-generated method stub

return generalsTypes[groupPosition];

}

@Override

public long getGroupId(int groupPosition) {

// TODO Auto-generated method stub

return groupPosition;

}

@Override

public int getChildrenCount(int groupPosition) {

// TODO Auto-generated method stub

return generals[groupPosition].length;

}

@Override

public Object getChild(int groupPosition, int childPosition) {

// TODO Auto-generated method stub

return generals[groupPosition][childPosition];

}

@Override

public long getChildId(int groupPosition, int childPosition) {

// TODO Auto-generated method stub

return childPosition;

}

@Override

public boolean hasStableIds() {

// TODO Auto-generated method stub

return true;

}

@Override

public View getGroupView(int groupPosition, boolean isExpanded,

View convertView, ViewGroup parent) {

// TODO Auto-generated method stub

LinearLayout ll = new LinearLayout(

ExpandableList.this);

ll.setOrientation(0);

ImageView logo = new ImageView(ExpandableList.this);

logo.setImageResource(logos[groupPosition]);

logo.setPadding(50, 0, 0, 0);

ll.addView(logo);

TextView textView = getTextView();

textView.setTextColor(Color.BLACK);

textView.setText(getGroup(groupPosition).toString());

ll.addView(textView);

return ll;

}

@Override

public View getChildView(int groupPosition, int childPosition,

boolean isLastChild, View convertView, ViewGroup parent) {

// TODO Auto-generated method stub

LinearLayout ll = new LinearLayout(

ExpandableList.this);

ll.setOrientation(0);

ImageView generallogo = new ImageView(

ExpandableList.this);

generallogo

.setImageResource(generallogos[groupPosition][childPosition]);

ll.addView(generallogo);

TextView textView = getTextView();

textView.setText(getChild(groupPosition, childPosition)

.toString());

ll.addView(textView);

return ll;

}

@Override

public boolean isChildSelectable(int groupPosition,

int childPosition) {

// TODO Auto-generated method stub

return true;

}

};

ExpandableListView expandableListView = (ExpandableListView) findViewById(R.id.list);

expandableListView.setAdapter(adapter);

//设置item点击的监听器

expandableListView.setOnChildClickListener(new OnChildClickListener() {

@Override

public boolean onChildClick(ExpandableListView parent, View v,

int groupPosition, int childPosition, long id) {

Toast.makeText(

ExpandableList.this,

"你点击了" + adapter.getChild(groupPosition, childPosition),

Toast.LENGTH_SHORT).show();

return false;

}

});

}

}

点击下载本demo源代码