Understand Menu option. a. Create an application that will change color of the screen, based on selected options from the menu.

Pro7Activity.java

package ps.pro7;

import android.app.Activity;
import android.graphics.Color;
import android.os.Bundle;
import android.view.ContextMenu;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ContextMenu.ContextMenuInfo;
import android.widget.AbsoluteLayout;

@SuppressWarnings("deprecation")
public class Pro7Activity extends Activity {
    /**
     *  www.master-gtu.blogspot.com
     *  pankaj sharma(8460479175),
     *  chavda vijay(8460420769) 
     */
 
 AbsoluteLayout al;
    
 @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        al=(AbsoluteLayout) findViewById(R.id.alayout);
        al.setOnCreateContextMenuListener(this);
    }
 public void createMenu(Menu menu)
 {
  
  MenuItem m1=menu.add(0,0,0,"RED");
  m1.setAlphabeticShortcut('r');
  m1.setIcon(R.drawable.icon);
  
  MenuItem m2=menu.add(0,1,1,"GREEN");
  m2.setAlphabeticShortcut('g');
  m1.setIcon(R.drawable.icon);
  
  MenuItem m3=menu.add(0,2,2,"BLUE");
  m3.setAlphabeticShortcut('b');
  m1.setIcon(R.drawable.icon);
     
 }
 public void listenMenu(MenuItem item)
 {
  int id=item.getItemId();
     switch(id)
     {
     case 0:
      al.setBackgroundColor(Color.RED);
      break;
     case 1:
      al.setBackgroundColor(Color.GREEN);
      break;
     case 2:
      al.setBackgroundColor(Color.BLUE);
      break;
     }
 }
    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
     // TODO Auto-generated method stub
     super.onCreateOptionsMenu(menu);
     createMenu(menu);
     return true;
    }
    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
     // TODO Auto-generated method stub
     super.onOptionsItemSelected(item);
     listenMenu(item);
     return true;
    }
    @Override
    public void onCreateContextMenu(ContextMenu menu, View v,
      ContextMenuInfo menuInfo) {
     // TODO Auto-generated method stub
     super.onCreateContextMenu(menu, v, menuInfo);
     createMenu(menu);
    }
    @Override
    public boolean onContextItemSelected(MenuItem item) {
     // TODO Auto-generated method stub
     super.onContextItemSelected(item);
     listenMenu(item);
     return true;
    }
}