Simple List View Example in Android

SIMPLE LIST VIEW EXAMPLE IN ANDROID :

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In this tutorial I will demonstrate you how to make a simple list view using Array Adapter and simple list item which is already present in android run time environment.

Create a new project in eclipse and give it a name and package name. I am giving name of the project as ListViewDemo and package name as com.listview.listviewdemo.

In activity_main.xml (lies in res => layout) copy the code shown below :

 <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="match_parent"  
   >  
   
   <ListView  
     android:layout_width="fill_parent"  
     android:layout_height="wrap_content"  
     android:id="@+id/simplelist"  
     />  
   
 </LinearLayout>  
   

In the above code we defined a ListView in xml file and give it id as simplelist.

Now in MainActivity.java copy the code shown below :

 package com.listview.listviewdemo;  
   
 import android.app.Activity;  
 import android.os.Bundle;  
 import android.view.View;  
 import android.widget.AdapterView;  
 import android.widget.AdapterView.OnItemClickListener;  
 import android.widget.ArrayAdapter;  
 import android.widget.ListView;  
 import android.widget.Toast;  
   
 public class MainActivity extends Activity {  
   
      ListView listView;  
      @Override  
      protected void onCreate(Bundle savedInstanceState) {  
           super.onCreate(savedInstanceState);  
           setContentView(R.layout.activity_main);  
             
           //find the list view from xml file  
           listView = (ListView)findViewById(R.id.simplelist);  
             
           // make an array which stores the list items  
           String[] myList = {"List Item1",   
                     "List Item2",   
                     "List Item3",   
                     "List Item4",   
                     "List Item5",   
                     "List Item6",   
                     "List Item7",   
                     "List Item8"};  
             
           //array adapter takes 4 parameters, context, layout reference, id of text view, array of items  
           ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, android.R.id.text1, myList);  
           listView.setAdapter(adapter);  
             
           // set the list item on click listener  
           listView.setOnItemClickListener(new OnItemClickListener() {  
   
                @Override  
                public void onItemClick(AdapterView<?> parent, View view,  
                          int position, long id) {  
                     // TODO Auto-generated method stub  
                     switch(position){  
                     case 0 :  
                          Toast.makeText(MainActivity.this, "Item 1 clicked", Toast.LENGTH_LONG).show();  
                          break;  
                            
                     case 1 :  
                          Toast.makeText(MainActivity.this, "Item 2 clicked", Toast.LENGTH_LONG).show();  
                          break;  
                            
                     case 2 :  
                          Toast.makeText(MainActivity.this, "Item 3 clicked", Toast.LENGTH_LONG).show();  
                          break;  
                            
                     case 3 :  
                          Toast.makeText(MainActivity.this, "Item 4 clicked", Toast.LENGTH_LONG).show();  
                          break;  
                            
                     case 4 :  
                          Toast.makeText(MainActivity.this, "Item 5 clicked", Toast.LENGTH_LONG).show();  
                          break;  
                            
                     case 5 :  
                          Toast.makeText(MainActivity.this, "Item 6 clicked", Toast.LENGTH_LONG).show();  
                          break;  
                            
                     case 6 :  
                          Toast.makeText(MainActivity.this, "Item 7 clicked", Toast.LENGTH_LONG).show();  
                          break;  
                            
                     case 7 :  
                          Toast.makeText(MainActivity.this, "Item 8 clicked", Toast.LENGTH_LONG).show();  
                          break;  
                     }  
                       
                }  
           });  
      }  
 }  
   

In the MainActivity.java we first bind the ListView from xml file by using findViewbyId() and than we need to define an Adapter.

Adapter is used to give the data to the list view, for that make a String array before which contains all the list items data. Now make an ArrayAdapter which takes 4 parameters in which first parameter is context, second parameter is the reference to the layout of list item ( in this example we are using android in build simple list view, so we pass simple list item from android.R.layout), the third parameter is used to give the id of the text view where each list item text will be set and in this example we give that id from in built android text id and the fourth parameter is the string array because we made a ArrayAdapter which is of type String.

And than just set the adapter in the list view. In this example we are also set up OnItemClickListener for the list view which listens whenever any item of the list view will be clicked.