SubMenuActivity.java

package com.androidcookbook.customsubmenu;

import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.SubMenu;
import android.widget.Toast;

import static android.view.MenuItem.SHOW_AS_ACTION_IF_ROOM;

public class SubMenuActivity extends Activity {

    private static final int OPTION_1 = 0;
    private static final int OPTION_2 = 1;
    private int GROUP_ID = 4;
    private int ITEM_ID =3;

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        MenuItem mi = menu.add("Main Menu, Option 1");
        mi.setShowAsAction(SHOW_AS_ACTION_IF_ROOM);
        SubMenu sub1 = menu.addSubMenu(GROUP_ID, ITEM_ID , Menu.NONE, R.string.submenu);
        sub1.setHeaderIcon(R.drawable.icon);
        sub1.setIcon(R.drawable.icon);
        sub1.add(GROUP_ID , OPTION_1, 0, "Submenu Option 1");
        sub1.add(GROUP_ID, OPTION_2, 1, "Submenu Option 2");
        return super.onCreateOptionsMenu(menu);
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        switch (item.getItemId()) {
            case OPTION_1:
                Toast.makeText(this, "Submenu 1, Option 1", Toast.LENGTH_LONG).show();
                break;
            case OPTION_2:
                Toast.makeText(this, "Submenu 1, Option 2", Toast.LENGTH_LONG).show();
                break;
        }
        return true;
    }

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