Android Checkable Menu Item Program

package com.example.usingcheckablemenuitems;
 
import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
 
public class MainActivity extends Activity {
 
    @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.main, menu);
        return true;
    }
 
    /*
     * When a checkable item is selected, the system calls your respective
     * item-selected callback method (such as onOptionsItemSelected()). It is
     * here that you must set the state of the checkbox, because a checkbox or
     * radio button does not change its state automatically. You can query the
     * current state of the item (as it was before the user selected it) with
     * isChecked() and then set the checked state with setChecked()
     */
    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        switch (item.getItemId()) {
        case R.id.save:
        case R.id.delete:
            if (item.isChecked())
                item.setChecked(false);
            else
                item.setChecked(true);
            return true;
        default:
            return super.onOptionsItemSelected(item);
        }
    }
}