Exercise : 7

Understand Menu option.

a. Create an application that will change color of the screen, based on selected options from the menu.
Screen Shot:

XML :
main.xml :

JAVA :
SeventhActivity.java :

package kmn.Seventh;

import android.app.Activity;
import android.graphics.Color;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.RelativeLayout;

public class SeventhActivity extends Activity 
{
    /** @author Y@@D */
    @Override
    public void onCreate(Bundle savedInstanceState) 
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
    }
    public boolean onCreateOptionsMenu(Menu menu) 
    {
     super.onCreateOptionsMenu(menu);
     CreateMenu(menu);
     return true;
    }
    public boolean onOptionsItemSelected(MenuItem item)
    {
     return MenuChoice(item);
    }
    private void CreateMenu(Menu menu)
    {
     MenuItem mnu1 = menu.add(0, 0, 0, "Red");
     {
      mnu1.setAlphabeticShortcut('r');
      mnu1.setIcon(R.drawable.icon);
     }
     MenuItem mnu2 = menu.add(0, 1, 0, "Green");
     {
      mnu2.setAlphabeticShortcut('g');
      mnu2.setIcon(R.drawable.icon);
     }
     MenuItem mnu3 = menu.add(0, 2, 0, "White");
     {
         mnu3.setAlphabeticShortcut('w');
         mnu3.setIcon(R.drawable.icon);
        }
    }
    private boolean MenuChoice(MenuItem item)
    {
     RelativeLayout l= (RelativeLayout) findViewById(R.id.relativeLayout1);
     
     switch (item.getItemId())
     {
      case 0:
       l.setBackgroundColor(Color.RED);
       return true;
      case 1:
       l.setBackgroundColor(Color.GREEN);
       return true;
      case 2:
       l.setBackgroundColor(Color.WHITE);
       return true;
     } 
  return false;
    }
}