#onOptionsItemSelected Method.

onOptionsItemSelected.java

package com.ahmad.mustafa.menuoption;

import android.graphics.Color;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.RelativeLayout;

public class MainActivity extends AppCompatActivity
{

    @Override
    protected void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu)
    {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.menu_main, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item)
    {
        RelativeLayout my_layout = (RelativeLayout) findViewById(R.id.content_main);

        switch (item.getItemId())
        {
            case R.id.red_item:
                if (item.isChecked())
                    item.setChecked(false);
                else
                    item.setChecked(true);
                my_layout.setBackgroundColor(Color.RED);
                return true;

            case R.id.black_item:
                if (item.isChecked())
                    item.setChecked(false);
                else
                    item.setChecked(true);
                my_layout.setBackgroundColor(Color.BLACK);
                return true;

            case R.id.blue_item:
                 if (item.isChecked())
                    item.setChecked(false);
                else
                    item.setChecked(true);
                my_layout.setBackgroundColor(Color.BLUE);
                return true;

            default:
                return super.onOptionsItemSelected(item);
        }

    }
}