button creation and message processing

Package Com.example.buttonapp;

Import Android.os.Bundle;
Import Android.view.View;
Import Android.view.View.OnClickListener;
Import Android.widget.Button;
Import android.app.Activity;


public class Mainactivity extends Activity {

Onclicklistener Listener1=null;
Onclicklistener Listener2=null;
Button button1;
Button button2;

@Override
protected void OnCreate (Bundle savedinstancestate) {
Super.oncreate (savedinstancestate);
Listener1=new Onclicklistener () {
public void OnClick (View v) {
Settitle ("Button1 is missing after the click!") ");
Button1.setvisibility (view.invisible);
Button2.setvisibility (view.visible);
}
};

Listener2=new Onclicklistener () {
public void OnClick (View v) {
Settitle ("Button2 is missing after the click!") ");
Button1.setvisibility (view.visible);
Button2.setvisibility (view.invisible);
}
};

Setcontentview (R.layout.activity_main);

button1= (Button) Findviewbyid (R.id.button1);
Button1.setonclicklistener (Listener1);
Button2= (Button) Findviewbyid (R.id.button2);
Button2.setonclicklistener (LISTENER2);

}



}

button creation and message processing