Android :: Trying To Open New Image On Clicking A Image Button

Can anybody please guide me how to write the code for opening the new image after clicking the imagebutton in android. I have tried something like this:
package com.example.imageButton;
import android.app.Activity; import android.os.Bundle;
import android.view.View; import android.widget.ImageButton;
public class imageButton extends Activity {
private static ImageButton seqIBtn;//these are the three imageButton private static ImageButton vidIBtn;private static ImageButton infoIBtn; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); seqIBtn = (ImageButton) findViewById(R.id.btnSequence); vidIBtn = (ImageButton) findViewById(R.id.btnVideo); infoIBtn = (ImageButton) findViewById(R.id.btnInfo);}