package com.fish.helloworld;

import android.app.Activity;

import android.content.Context;

import android.graphics.Canvas;

import android.graphics.Color;

import android.graphics.Paint;

import android.os.Bundle;

import android.util.Log;

import android.view.KeyEvent;

import android.view.Menu;

import android.view.MenuItem;

import android.view.MotionEvent;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.Button;

import android.widget.ImageView;

import android.widget.TextView;

public class MainActivity extends Activity {

    private Button m_Button;

    public static final int RED_MENU_ID = Menu.FIRST;

    public static final int GREEN_MENU_ID = Menu.FIRST + 1;

    public static final int BLUE_MENU_ID = Menu.FIRST + 2;

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.skeleton_activity);

        m_Button = (Button)findViewById(R.id.button1);

    }

    @Override

    public boolean onCreateOptionsMenu(Menu menu){

        super.onCreateOptionsMenu(menu);

        menu.add(0, RED_MENU_ID, 0, "RED");

        menu.add(0, GREEN_MENU_ID, 0, "GREEN");

        menu.add(0, BLUE_MENU_ID, 0, "BLUE");

        return true;

    }

    @Override

    public boolean onOptionsItemSelected(MenuItem item){

        switch(item.getItemId()){

        case RED_MENU_ID:

            m_Button.setBackgroundColor(Color.RED);

            m_Button.setText("RED");

            return true;

        case GREEN_MENU_ID:

            m_Button.setBackgroundColor(Color.GREEN);

            m_Button.setText("GREEN");

            return true;

        case BLUE_MENU_ID:

            m_Button.setBackgroundColor(Color.BLUE);

            m_Button.setText("BLUE");

            return true;

        }

        return super.onOptionsItemSelected(item);

    }

}

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

    android:layout_width="match_parent"

    android:layout_height="match_parent"

    android:orientation="vertical" >

    <Button

        android:id="@+id/button1"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:text="Button" />

</LinearLayout>