android的ExpandableListView

简介:

activity_main.xml


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<RelativeLayout 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:paddingBottom= "@dimen/activity_vertical_margin"
     android:paddingLeft= "@dimen/activity_horizontal_margin"
     android:paddingRight= "@dimen/activity_horizontal_margin"
     android:paddingTop= "@dimen/activity_vertical_margin"
     tools:context= "com.example.expandablelistview.MainActivity"  >
 
     <ExpandableListView 
         android:id= "@+id/ExpandableListView1_1"
         android:layout_width= "match_parent"
         android:layout_height= "wrap_content"
        android:layout_alignParentLeft= "true"
        android:layout_alignParentTop= "true"
        android:groupIndicator= "@null"
         
                 >
         
     </ExpandableListView>
 
</RelativeLayout>
<!--  android:groupIndicator= "@null" 去掉自带的箭头图标 -->

group_item.xml

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<?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= "wrap_content"
     android:orientation= "horizontal"  >
     
     <ImageView
         android:id= "@+id/imageViewgroup_1" 
         android:layout_width= "wrap_content"
         android:layout_height= "wrap_content"
         android:src= "@drawable/ic_launcher"
         />
     
     <TextView 
         android:id= "@+id/textViewgroup_1"
         android:layout_width= "wrap_content"
         android:layout_height= "wrap_content"
       
         />
</LinearLayout>


child_item.xml

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<?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= "wrap_content"
     android:orientation= "horizontal"  >
     
     
      <ImageView
         android:id= "@+id/imageViewchild_1" 
         android:layout_width= "wrap_content"
         android:layout_height= "wrap_content"
         android:src= "@drawable/ic_launcher"
         android:padding= "10dp"
         />
     
     <TextView 
         android:id= "@+id/textViewchild_1"
         android:layout_width= "wrap_content"
         android:layout_height= "wrap_content"
         android:text= "sdfds"
         android:padding= "10dp"
       
         />
</LinearLayout>

MainActivity

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package  com.example.expandablelistview;
 
import  android.app.Activity;
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;
 
public  class  MainActivity  extends  Activity {
     private  ExpandableListView expandableListView;
 
     @Override
     protected  void  onCreate(Bundle savedInstanceState) {
         super .onCreate(savedInstanceState);
         setContentView(R.layout.activity_main);
         expandableListView=(ExpandableListView) findViewById(R.id.ExpandableListView1_1);
         expandableListView.setAdapter( new  MyExpandableListAdapter());
     }
 
     @Override
     public  boolean  onCreateOptionsMenu(Menu menu) {
         // Inflate the menu; this adds items to the action bar if it is present.
         getMenuInflater().inflate(R.menu.main, menu);
         return  true ;
     }
 
     @Override
     public  boolean  onOptionsItemSelected(MenuItem item) {
         // Handle action bar item clicks here. The action bar will
         // automatically handle clicks on the Home/Up button, so long
         // as you specify a parent activity in AndroidManifest.xml.
         int  id = item.getItemId();
         if  (id == R.id.action_settings) {
             return  true ;
         }
         return  super .onOptionsItemSelected(item);
     }
     
     class  MyExpandableListAdapter  extends  BaseExpandableListAdapter{
         private  String[] skills =  new  String[]{
                 "WORD" "EXCEL" "EMAIL" "PPT"
         };
         private  String[][] groups =  new  String[][]{
                     { "文档编辑" "文档排版" "文档处理" "文档打印" },
                     { "表格编辑" "表格排版" "表格处理" "表格打印" },
                     { "收发邮件" "管理邮箱" "登录登出" "注册绑定" },
                     { "演示编辑" "演示排版" "演示处理" "演示打印" },
             };
         @Override
         public  int  getGroupCount() {
             // TODO Auto-generated method stub
             return  skills.length;
         }
         //二级列表的数量
         @Override
         public  int  getChildrenCount( int  groupPosition) {
             // TODO Auto-generated method stub
             return  groups[groupPosition].length;
         }
         //返回每一组的对象
         @Override
         public  Object getGroup( int  groupPosition) {
             // TODO Auto-generated method stub
             return  skills[groupPosition];
         }
         //返回每组中的列表项
         @Override
         public  Object getChild( int  groupPosition,  int  childPosition) {
             // TODO Auto-generated method stub
             return  groups[groupPosition][childPosition];
         }
 
         @Override
         public  long  getGroupId( int  groupPosition) {
             // TODO Auto-generated method stub
             return  groupPosition;
         }
 
         @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
             if (convertView== null ){
                 convertView=getLayoutInflater().inflate(R.layout.group_item,  null );
                 
             }
             ImageView imageView=(ImageView) convertView.findViewById(R.id.imageViewgroup_1);
             TextView textView=(TextView) convertView.findViewById(R.id.textViewgroup_1);
             imageView.setImageResource(R.drawable.ic_launcher);
             textView.setText(skills[groupPosition]);
             return  convertView;
         }
 
         @Override
         public  View getChildView( int  groupPosition,  int  childPosition,
                 boolean  isLastChild, View convertView, ViewGroup parent) {
             // TODO Auto-generated method stub
             if (convertView== null ){
                 convertView=getLayoutInflater().inflate(R.layout.child_item,  null );
                 ImageView imageView=(ImageView) convertView.findViewById(R.id.imageViewchild_1);
                 TextView textView=(TextView) convertView.findViewById(R.id.textViewchild_1);
                 imageView.setImageResource(R.drawable.ic_launcher);
                 textView.setText(groups[groupPosition][childPosition]);
             }
             return  convertView;
         }
 
         @Override
         public  boolean  isChildSelectable( int  groupPosition,  int  childPosition) {
             // TODO Auto-generated method stub
             return  true ;
         }
         
     }
}

wKioL1hQ_y3CFvIhAACn1k8Opfw784.png-wh_50



 本文转自 matengbing 51CTO博客,原文链接:http://blog.51cto.com/matengbing/1882709


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