TestScreen.java

import net.rim.device.api.system.Characters;
import net.rim.device.api.ui.Field;
import net.rim.device.api.ui.FieldChangeListener;
import net.rim.device.api.ui.Keypad;
import net.rim.device.api.ui.UiApplication;
import net.rim.device.api.ui.component.ButtonField;
import net.rim.device.api.ui.container.MainScreen;

public class TestScreen extends MainScreen implements FieldChangeListener {

    private ButtonField btn1, btn2;

    public TestScreen(){
        btn1 = new ButtonField("Button 1", FOCUSABLE | ButtonField.CONSUME_CLICK);
        btn1.setChangeListener(this);
        btn2 = new ButtonField("Button 2", FOCUSABLE | ButtonField.CONSUME_CLICK);
        btn2.setChangeListener(this);

        add(btn1);
        add(btn2);
    }

    public void fieldChanged(Field arg0, int arg1) {
        if (arg0 == btn1){
            UiApplication.getUiApplication().pushScreen(new BiodataScreen());
        }
        else if (arg0 == btn2){
            UiApplication.getUiApplication().pushScreen(new ContactUsScreen());
        }

    }

    protected boolean keyDown(int keycode, int time) {
         int key = Keypad.key(keycode);
            if(key == Characters.ESCAPE){
                System.exit(0);
            }
        return super.keyDown(keycode, time);
    }

    protected boolean onSavePrompt() {
        return true;
    }
}