How to add imageview to the layout and change the source of the image with the click of the button.

This is a very simple android code in which we set the mage view in the layout and then use the the imageview to set the new source.This change in the source of the image is set on the click of the button.

Code for Layout:

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout&#95;width="match&#95;parent"
    android:layout&#95;height="match&#95;parent"
    android:paddingBottom="@dimen/activity&#95;vertical&#95;margin"
    android:paddingLeft="@dimen/activity&#95;horizontal&#95;margin"
    android:paddingRight="@dimen/activity&#95;horizontal&#95;margin"
    android:paddingTop="@dimen/activity&#95;vertical&#95;margin"
    tools:context=".MainActivity" >

    <Button
        android:id="@+id/button1"
        android:layout&#95;width="wrap&#95;content"
        android:layout&#95;height="wrap&#95;content"
        android:layout&#95;alignParentTop="true"
        android:layout&#95;centerHorizontal="true"
        android:layout&#95;marginTop="158dp"
        android:text="Button" />

    <ImageView
        android:id="@+id/imageView1"
        android:layout&#95;width="wrap&#95;content"
        android:layout&#95;height="wrap&#95;content"
        android:layout&#95;alignLeft="@+id/button1"
        android:layout&#95;alignParentTop="true"
        android:layout&#95;alignRight="@+id/button1"
        android:layout&#95;marginTop="54dp"
        android:src="@drawable/ic&#95;launcher" />

</RelativeLayout>

Now put the new image that you want to change in the drawable folder in the res.

Code for MainActivity:

package com.example.imageset;

import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ImageView;

public class MainActivity extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        final ImageView image=(ImageView)findViewById(R.id.imageView1);
        Button change=(Button)findViewById(R.id.button1);
        change.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                // TODO Auto-generated method stub
                image.setImageResource(R.drawable.index);
            }
        });
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }

}