Expandable Listview Android example

Create New Android Project In Main Activity :

 package com.multilayerexpandable;  
 import java.util.ArrayList;  
 import android.app.ExpandableListActivity;  
 import android.content.Context;  
 import android.os.Bundle;  
 import android.view.LayoutInflater;  
 import android.view.View;  
 import android.widget.ExpandableListView;  
 import android.widget.ExpandableListView.OnChildClickListener;  
 import android.widget.Toast;  
 public class MainActivity extends ExpandableListActivity implements  
           OnChildClickListener {  
      @Override  
      public void onCreate(Bundle savedInstanceState) {  
           super.onCreate(savedInstanceState);  
           ExpandableListView expandbleLis = getExpandableListView();  
           expandbleLis.setDividerHeight(2);  
           expandbleLis.setGroupIndicator(null);  
           expandbleLis.setClickable(true);  
           setGroupData();  
           setChildGroupData();  
           NewAdapter mNewAdapter = new NewAdapter(groupItem, childItem);  
           mNewAdapter  
                     .setInflater(  
                               (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE),  
                               this);  
           getExpandableListView().setAdapter(mNewAdapter);  
           expandbleLis.setOnChildClickListener(this);  
      }  
      public void setGroupData() {  
           groupItem.add("Android");  
           groupItem.add("Extras");  
      }  
      ArrayList<String> groupItem = new ArrayList<String>();  
      ArrayList<Object> childItem = new ArrayList<Object>();  
      public void setChildGroupData() {  
           /**  
            * Add Data For Android 
            */  
           ArrayList<String> child = new ArrayList<String>();  
           child.add("Cupcake");  
           child.add("Donut");  
           child.add("Eclair");  
           child.add("Froyo");  
           child.add("Gingerbread");  
           child.add("Honeycomb");  
           child.add("Ice Cream Sandwich");  
           child.add("Jelly Bean");  
           childItem.add(child);  
           /**  
            * Add Data For Extras_  
            */  
           child = new ArrayList<String>();  
           child.add("Dj-Android");  
           child.add("Dhaval Sodha Parmar");  
           childItem.add(child);  
      }  
      @Override  
      public boolean onChildClick(ExpandableListView parent, View v,  
                int groupPosition, int childPosition, long id) {  
           Toast.makeText(MainActivity.this, "Clicked On Child",  
                     Toast.LENGTH_SHORT).show();  
           return true;  
      }  
 }  

Class NewAdapter.java

 package com.multilayerexpandable;  
 import java.util.ArrayList;  
 import android.app.Activity;  
 import android.view.LayoutInflater;  
 import android.view.View;  
 import android.view.View.OnClickListener;  
 import android.view.ViewGroup;  
 import android.widget.BaseExpandableListAdapter;  
 import android.widget.CheckedTextView;  
 import android.widget.ImageView;  
 import android.widget.TextView;  
 import android.widget.Toast;  
 @SuppressWarnings("unchecked")  
 public class NewAdapter extends BaseExpandableListAdapter {  
      public ArrayList<String> groupItem, tempChild;  
      public ArrayList<Object> Childtem = new ArrayList<Object>();  
      public LayoutInflater minflater;  
      public Activity activity;  
      public NewAdapter(ArrayList<String> grList, ArrayList<Object> childItem) {  
           groupItem = grList;  
           this.Childtem = childItem;  
      }  
      public void setInflater(LayoutInflater mInflater, Activity act) {  
           this.minflater = mInflater;  
           activity = act;  
      }  
      @Override  
      public Object getChild(int groupPosition, int childPosition) {  
           return null;  
      }  
      @Override  
      public long getChildId(int groupPosition, int childPosition) {  
           return 0;  
      }  
      @Override  
      public View getChildView(int groupPosition, final int childPosition,  
                boolean isLastChild, View convertView, ViewGroup parent) {  
           tempChild = (ArrayList<String>) Childtem.get(groupPosition);  
           TextView text = null;  
           ImageView img = null;  
           if (convertView == null) {  
                convertView = minflater.inflate(R.layout.childrow, null);  
           }  
           text = (TextView) convertView.findViewById(R.id.textView1);  
           img = (ImageView) convertView.findViewById(R.id.childImage);  
           text.setText(tempChild.get(childPosition));  
           if (childPosition == (tempChild.size() - 1)) {  
                img.setImageResource(R.drawable.dh);  
           }  
           if (childPosition == tempChild.size()) {  
                img.setImageResource(R.drawable.dj);  
           }  
           convertView.setOnClickListener(new OnClickListener() {  
                @Override  
                public void onClick(View v) {  
                     Toast.makeText(activity, tempChild.get(childPosition),  
                               Toast.LENGTH_SHORT).show();  
                }  
           });  
           return convertView;  
      }  
      @Override  
      public int getChildrenCount(int groupPosition) {  
           return ((ArrayList<String>) Childtem.get(groupPosition)).size();  
      }  
      @Override  
      public Object getGroup(int groupPosition) {  
           return null;  
      }  
      @Override  
      public int getGroupCount() {  
           return groupItem.size();  
      }  
      @Override  
      public void onGroupCollapsed(int groupPosition) {  
           super.onGroupCollapsed(groupPosition);  
      }  
      @Override  
      public void onGroupExpanded(int groupPosition) {  
           super.onGroupExpanded(groupPosition);  
      }  
      @Override  
      public long getGroupId(int groupPosition) {  
           return 0;  
      }  
      @Override  
      public View getGroupView(int groupPosition, boolean isExpanded,  
                View convertView, ViewGroup parent) {  
           if (convertView == null) {  
                convertView = minflater.inflate(R.layout.grouprow, null);  
           }  
           ((CheckedTextView) convertView).setText(groupItem.get(groupPosition));  
           ((CheckedTextView) convertView).setChecked(isExpanded);  
           return convertView;  
      }  
      @Override  
      public boolean hasStableIds() {  
           return false;  
      }  
      @Override  
      public boolean isChildSelectable(int groupPosition, int childPosition) {  
           return false;  
      }  
 }  

Grouprow.xml

 <CheckedTextView xmlns:android="http://schemas.android.com/apk/res/android"  
   xmlns:tools="http://schemas.android.com/tools"  
   android:id="@+id/textView1"  
   android:layout_width="wrap_content"  
   android:layout_height="60dp"  
   android:layout_marginLeft="5dp"  
   android:gravity="center_vertical"  
   android:padding="10dp"  
   android:text="@string/hello_world"  
   android:textColor="#FFFFFF"  
   android:textSelectHandleLeft="@string/hello_world"  
   android:textSize="14sp"  
   android:textStyle="bold" />  

childrow.xml

 <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="40dp"  
   android:background="@android:color/black"  
   android:clickable="true"  
   android:orientation="vertical"  
   android:paddingLeft="40dp"  
   tools:context=".MainActivity" >  
   <LinearLayout  
     android:layout_width="match_parent"  
     android:layout_height="39dp"  
     android:gravity="center_vertical" >  
     <ImageView  
       android:id="@+id/childImage"  
       android:layout_width="30dp"  
       android:layout_height="30dp"  
       android:layout_margin="5dp"  
       android:background="@drawable/ic_launcher"  
       android:contentDescription="@string/hello_world" />  
     <TextView  
       android:id="@+id/textView1"  
       android:layout_width="wrap_content"  
       android:layout_height="wrap_content"  
       android:layout_marginLeft="5dp"  
       android:text="@string/hello_world"  
       android:textColor="#FFFFFF"  
       android:textSize="14sp"  
       android:textStyle="bold" />  
   </LinearLayout>  
 </LinearLayout>  

Android Manifest file :

 <?xml version="1.0" encoding="utf-8"?>  
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"  
   package="com.multilayerexpandable"  
   android:versionCode="1"  
   android:versionName="1.0" >  
   <uses-sdk  
     android:minSdkVersion="8"  
     android:targetSdkVersion="16" />  
   <application  
     android:allowBackup="true"  
     android:icon="@drawable/ic_launcher"  
     android:label="@string/app_name"  
     android:theme="@style/AppTheme" >  
     <activity  
       android:theme="@android:style/Theme.NoTitleBar"  
       android:name="com.multilayerexpandable.MainActivity"  
       android:label="@string/app_name" >  
       <intent-filter>  
         <action android:name="android.intent.action.MAIN" />  
         <category android:name="android.intent.category.LAUNCHER" />  
       </intent-filter>  
     </activity>  
   </application>  
 </manifest>