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In this tutorial we shall be covering Android's ListView API with the help
of an example with some other view elements such as ImageView, CheckBox etc.

Final screen of this Expandable listview example would look like the below image:

List of groups as initial view of this application showing two different
sections as different categories.















Following image shows screen after clicking both the items from the expandable 
ListView:


This example ListView initial screen layout as follows:

main.xml

<?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">
    <ListView android:id="@android:id/list" 
            android:layout_width="fill_parent" 
            android:layout_height="fill_parent"/>
</LinearLayout>



listitemview1.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
  xmlns:android="http://schemas.android.com/apk/res/android"
  android:layout_width="fill_parent"
  android:layout_height="fill_parent">
  <ImageView android:id="@+id/camera1" android:src="@drawable/camera1" 
             android:layout_width="wrap_content" 
                         android:layout_height="wrap_content" />
  <CheckBox android:id="@+id/chkbox1" 
            android:text="Add to Shopping Cart" 
                        android:layout_width="wrap_content" 
                        android:layout_height="wrap_content" />
</LinearLayout>



listitemview2.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
  xmlns:android="http://schemas.android.com/apk/res/android"
  android:layout_width="fill_parent"
  android:layout_height="fill_parent">
  <ImageView android:id="@+id/cupboard" 
             android:src="@drawable/cupboards1" 
             android:layout_width="wrap_content" 
             android:layout_height="wrap_content" />
  <CheckBox android:id="@+id/chkbox1" 
            android:text="Add to Shopping Cart" 
            android:layout_width="wrap_content" 
            android:layout_height="wrap_content" />
</LinearLayout>



Using Android API such as ListActivity and BaseAdapter class 
files, those can be extended by example specific Java class files such as 
"ExampleListView" extends ExpandableListActivity and a private inner class file
such as "ExampleListViewAdapter" extends BaseExpandableListAdapter class file.

ExampleListView.java

package com.techienjoy.example.listview;

import android.app.ListActivity;
import android.content.Context;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.LinearLayout;

public class ExampleListView extends ListActivity {
        
        private LayoutInflater layoutInflater = null;
        private LinearLayout linearLayout = null;                 
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        linearLayout = new LinearLayout(this);
        ExampleListViewAdapter adapter = new ExampleListViewAdapter(this);
        setListAdapter(adapter);
    }
    private class ExampleListViewAdapter extends BaseAdapter {
        private Context context;
        public ExampleListViewAdapter(Context context) {
                super();
                this.context = context;
        }

        public int getCount() {
                return 2;
        }

        public Object getItem(int arg0) {
                return null;
        }

        public long getItemId(int arg0) {

                return 0;
        }

        public View getView(int position, View convertView, ViewGroup parent) {
    
           if(layoutInflater == null)
                layoutInflater = (LayoutInflater) context.
		                    getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    

           if(position == 0) {
             linearLayout = (LinearLayout) layoutInflater.
	                            inflate(R.layout.listitemview1, null);
           }
           if(position == 1) {
             linearLayout = (LinearLayout) layoutInflater.
	                            inflate(R.layout.listitemview2, null);
           }
           return linearLayout;

        }
    }
}



Once all these files are placed in folders as appropriate within Eclipse 
Workspace and Android Project, Java files compiled and *.apk file created. 
Then this APK file can be published to Android Emulator for getting installed
 and displaying on invocation of this application at runtime.


If you would like to share your thoughts on this, please write to us @
usingframeworks @ gmail dot com
If anything missed out , please let me know at techienjoy at yahoo . com
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References : 
Tags: TabHost and TabActivity Example on Android Platform
Tags: ListView Example on Android Platform
Tags: android sensors list
Tags: android listview example
Tags: android imageview example
Tags: Android example download any file sourcecode
Tags: android expandable list dynamically created example
Tags: android expandable list example
Tags: Android Gallery surfaceviews spinner
Tags: Android example download any file sourcecode
Tags: Android Layout Example
Tags: Android Text To Speech Example

Tags: DOJO Example Dialog
Tags: DOJO Example Tree Widget
Tags: different logger file log4j
Tags: JDBC Transaction isolation
Tags: event handling java code
Tags: example quartz scheduler
Tags: example tag library web application
Tags: Flex
Tags: index
Tags: inmemory image creation java awt
Tags: JSF Example Main
Tags: JSF Example Tags CheckBoxes
Tags: JSF Example Tags dataTable
Tags: JSF Example Tags SelectBoxes
Tags: JSF Example Tags Walkthrough
Tags: JSF Example Validation
Tags: JSF Resource Bundle
Tags: log4j example 1
Tags: log4j example
Tags: Miscellaneous
Tags: Mule ESB File Transport
Tags: Mule ESB JMS Transport
Tags: stream download batch
Tags: sychronized block wait notify
Tags: thread wait notify example
Tags: using apache commons log
Tags: web load test
Tags: Wizard Framework Idea Java




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