Share the Android Expandablelistview controls using tutorials _android

This article uses a demo to showcase the use of Expandablelistview controls in Android, such as how to bind a data source in a group/Sub ListView. Directly on the code below:
Program Structure diagram:

Layout directory under the Main.xml file source code is as follows:

<?xml version= "1.0" encoding= "Utf-8"?> <linearlayout xmlns:android= 
"http://schemas.android.com/apk/" Res/android " 
  android:orientation=" vertical " 
  android:layout_width=" fill_parent " 
  android:layout_" height= "Fill_parent" > 
  <!--We'll define how ListView will be displayed (in another layout file) without the default, if you want to customize the way  
     ListView is displayed here this Android : id= "@id/android:list" must be written like this--> 
  <!--android:drawselectontop= "false" This property is used to set the background color on the ListView will 
   not Block (overwrite) content, if this is false, it will not overwrite-->  
  <expandablelistview  
    android:id= "@id/android:list"         
    android: Layout_width= "Fill_parent"         
    android:layout_height= "wrap_content"        
    android:layout_weight= "1"         
    Android:drawselectorontop= "false"/>  

The Contactsactivity.java source code in the

Package Com.andyidea.demo is as follows:

Package Com.andyidea.demo; 
Import java.util.ArrayList; 
 
Import java.util.List; 
Import android.app.ExpandableListActivity; 
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.TextView;      public class Contactsactivity extends expandablelistactivity {list<string> Group;   Group List list<list<string>> child; Sub-list Contactsinfoadapter adapter; The data adapter/** called when the ' activity is ' is a-created. 
    * * @Override public void onCreate (Bundle savedinstancestate) {super.oncreate (savedinstancestate); Requestwindowfeature (Window.feature_no_title); 
    Set to untitled Setcontentview (R.layout.main); 
     
    Getexpandablelistview (). Setbackgroundresource (R.DRAWABLE.DEFAULT_BG); 
    Initializedata (); Getexpandablelistview (). Setadapter (New Contactsinfoadapter ()); Getexpandablelistview (). Setcachecolorhint (0); Prevent black background When setting drag list/** * Initialization Group, sub-list data/private void Initializedata () {group = new ARRAYLIST&L T 
    String> (); 
     
    Child = new arraylist<list<string>> (); 
    Addinfo ("Andy", New string[]{"male", "138123***", "Guangzhou"}); 
    Addinfo ("Fairy", new string[]{"female", "138123***", "Guangzhou"}); 
    Addinfo ("Jerry", New string[]{"male", "138123***", "Shenzhen"}); 
    Addinfo ("Tom", New string[]{"female", "138123***", "Shanghai"}); 
     
  Addinfo ("Bill", New string[]{"male", "138231***", "Zhanjiang"});  /** * Simulate adding data to groups, sub lists * @param g-group * @param c-child * * private void Addinfo (String g,string[) 
    c) {Group.add (g); 
    list<string> ChildItem = new arraylist<string> (); 
    for (int i=0;i<c.length;i++) {childitem.add (c[i]); 
  } child.add (ChildItem); Class Contactsinfoadapter extends Baseexpandablelistadapter{//-----------------child----------------//@Override public Object getchild (int grouppositi 
    ON, int childposition} {return Child.get (groupposition). get (Childposition); 
    @Override public long Getchildid (int groupposition, int childposition) {return childposition; @Override public int Getchildrencount (int groupposition) {return child.get (groupposition). Si 
    Ze (); @Override public View getchildview (int groupposition, int childposition, Boolean islastchild, V  
      Iew Convertview, ViewGroup parent) {String string = Child.get (groupposition). get (Childposition); 
    return Getgenericview (String); 
      //----------------Group----------------//@Override public Object getgroup (int groupposition) { 
    Return Group.get (groupposition); @Override public long getgroupid (int groupposition) {return grouppositIon 
    @Override public int GetGroupCount () {return group.size (); @Override public View getgroupview (int groupposition, Boolean isexpanded, View Convertview, V  
      Iewgroup parent) {String string = Group.get (groupposition); 
    return Getgenericview (String); //Create Group/Child View public TextView Getgenericview (String s) {//Layout parameters for the Expandablelistvie  
  
      W abslistview.layoutparams LP = new Abslistview.layoutparams (ViewGroup.LayoutParams.FILL_PARENT, 40);  
      TextView Text = new TextView (contactsactivity.this);  
      TEXT.SETLAYOUTPARAMS (LP); Center the text vertically text.setgravity (gravity.center_vertical |  
      Gravity.left);  
        
      Set the text starting position text.setpadding (36, 0, 0, 0);  
      Text.settext (s);  
    return text; @Override public boolean hasstableids () {//TOdo auto-generated method stub return false; @Override public boolean ischildselectable (int groupposition, int childposition) {//TODO auto-g 
    Enerated method stub return true;  } 
     
  } 
}

Finally, after the program is run the screenshot below:

I hope this article will help you learn about Android software programming.