package com.MySample;

import android.app.Activity;
import android.os.Bundle;
import android.widget.*;
import android.view.*;

public class MySample extends Activity {
    
    // put instance variables here
    
    ImageButton myImageButton;
	
	
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        
        // we will use the main.xml file to create all of our
        // UI objects and display them on the screen
        setContentView(R.layout.main);
        
        setTitle("Title under status bar");
        
        // put other initialization stuff here
        // references to your UI objects would get initialized here
        // All objects declared in the layout file main.xml 
        // are created by the Activity  setContentView(R.layout.main);
        // you call the findViewById method to get their memory location

        myImageButton = (ImageButton) findViewById(R.id.ImageButton01);
        
    }
    
    // put other methods here


    // onButtonClick method
    // the name of the method was defined in the xml file
    public void onButtonClick(View v)
    {
    	// do whatever
    	// v will hold the address of the Button
    }


    
}



<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    >

	<TextView  
    	android:layout_width="fill_parent" 
    	android:layout_height="wrap_content" 
    	android:text="@string/hello"
    	/>

	<Button 
		android:text="@+id/Button01" 
		android:id="@+id/Button01" 
		android:layout_width="wrap_content" 
		android:layout_height="wrap_content"
		android:onClick="onButtonClick"
	>
	</Button>

	<CheckBox 
		android:text="@+id/CheckBox01" 
		android:id="@+id/CheckBox01" 
		android:layout_width="wrap_content" 
		android:layout_height="wrap_content">
	</CheckBox>

	<ImageButton 
		android:id="@+id/ImageButton01" 
		android:layout_width="wrap_content" 
		android:layout_height="wrap_content">
	</ImageButton>

	<TextView 
		android:text="@+id/TextView01" 
		android:id="@+id/TextView01" 
		android:layout_width="wrap_content" 
		android:layout_height="wrap_content">
	</TextView>

	<ImageView 
		android:id="@+id/ImageView01" 
		android:layout_width="wrap_content" 
		android:layout_height="wrap_content">
	</ImageView>

</LinearLayout>