Expand the Project in the Package Explorer à Expand res folder à Layout folder à Select main.xml.

· Here’s an XML layout file (main.xml) that is identical in behavior to the programmatically constructed file:

<?xml version="1.0" encoding="utf-8"?> 
<TextView xmlns:android="http://schemas.android.com/apk/res/android" 
              android:id="@+id/textview01" 
              android:layout_width="wrap_content" 
              android:layout_height="wrap_content"

              android:textSize="30px"

              android:textStyle="bold"

              android:typeface="serif" 

              android:text="@string/hello"/>

·         Inside the res/values/ folder open strings.xml, modify the strings.xml as shown below:

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

<resources>

     <string name="hello">Welcome! This is my first Android Application</string>

     <string name="app_name">FirstAndroidApp</string>

</resources>

·         Now open and modify your HelloAndroid class and use the XML layout. Edit the file as shown below:

package com.example.firstApp;
  

import android.app.Activity;

import android.os.Bundle;

  

public class HelloAndroid  extends Activity {

     /** Called when the activity is first created. */

     @Override

     public void onCreate(Bundle savedInstanceState) {

         super.onCreate(savedInstanceState);

         setContentView(R.layout.main);

    }

}

After creating the above changes run your application:

Right click on the project (FirstAndroidApp) which is shown in the Package Explorer à Select Run As à Android Application.

Output as shown below:

After performing the above steps you can easily create and run an Android application by using XML layout files.

Thanks.