Android ListView Tutorial

Android ListView Tutorials

A ListView is a ViewGroup which displays a list of items  can scrollable.The list items can are inserted automatically onto the list using a ListAdapter.

In this tutorial,i'm going to teach you creating a ListView and showing a toast message on the selected list item.

Step by step tutorial:

1.Create a new project

       Project Name    :  SimpleListView

             Package              :  com.roney.simplelistview

             Main Activity     :  SimpleListViewActivity.java

             Build Target       :  Android 2.2

Refer:

Drag & drop elements in Composite

2.After creating the project,Open your MAinActivity class.Here it is 

    SimpleListViewActivity.java and extends the class from ListActivity. 

  public class SimpleListViewActivity extends ListActivity

   {

   }

3.Now we nee to have a string resource file to store all list items.So  

    create  a   XML file under res/values/ folder and save it as list_data.xml 

    and enter the following code.

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

<resources>

    <string-array name="social_sites">

        <item>Facebook</item>

        <item>Twitter</item>

        <item>Yahoo</item>

        <item>Google+</item>

        <item>Orkut</item>

        </string-array>

</resources>

4.Now we need to create the layout to show each items in the ListView. 
    Create a xml file under res/layout folder as list_item.xml

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

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

    android:id="@+id/label"

        android:layout_width="fill_parent"

        android:layout_height="fill_parent"

        android:padding="10dip"

        android:textSize="16dip"

        android:textStyle="bold" >

</TextView>

5.Open your main activity,ie.SimpleListViewActivity.java and type the 

    following code.

SimpleListViewActivity.java

package com.roney.simplelistview;

import android.app.ListActivity;

import android.os.Bundle;

import android.view.View;

import android.widget.ArrayAdapter;

import android.widget.ListView;

import android.widget.Toast;

public class SimpleListViewActivity extends ListActivity

 {

   

 // defining array to store string resources

 String[] social_sites;

      

 @Override

 public void onCreate(Bundle savedInstanceState)

 {

 super.onCreate(savedInstanceState);

 // storing string resources into Array

 social_sites = getResources().getStringArray(R.array.social_sites);

          

 // Binding resources Array to ListAdapter

 this.setListAdapter(new ArrayAdapter<String>

(this,R.layout.list_item, R.id.label,social_sites));

  

}

@Override

protected void onListItemClick(ListView l, View v, int position, long id)

{

      Toast.makeText(this, "You have selected : "+social_sites[position], Toast.LENGTH_SHORT).show();

}

}

6.Now its time to run the project.The result will show in the emulator is 

    shown bellow.

  The result show a ListView with list of array items.When a item in the list is selected you will see a toast message.

"Your comments and suggestions please"