How to get the Menu key working in AppCompat

FooActivity.java

package foo.bar;

import android.support.v7.app.ActionBarActivity;
import android.support.v7.widget.Toolbar;
import android.os.Bundle;
import android.view.KeyEvent;
import android.view.Menu;

public class FooActivity extends ActionBarActivity {
private Toolbar toolbar;

  @Override
  public void onCreate(Bundle icicle){
    setContentView(R.layout.foo);
    toolbar = (Toolbar) findViewById(R.id.toolbar);
    if (toolbar !=null) {
      setSupportActionBar(toolbar);
    } 
  }

  @Override
  public boolean onCreateOptionsMenu(Menu menu) {
      getMenuInflater().inflate(R.menu.main, menu);
      return true;
  }

  public boolean onKeyUp(int keyCode, KeyEvent event) {
    // Menu key was pressed.
      if (keyCode == KeyEvent.KEYCODE_MENU) {
          toolbar = (Toolbar) findViewById(R.id.toolbar);
          if (toolbar.isOverflowMenuShowing()) {
            // Overflow is showing, hide the menu.
              toolbar.dismissPopupMenus();
          } else {
            // Overflow is hidden, show menu.
              toolbar.showOverflowMenu();
          }
          return true;
      }
    return super.onKeyUp(keyCode, event);
  }
}

main.xml

<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android"
      xmlns:appcompat="http://schemas.android.com/apk/res-auto">
      
    <item android:id="@+id/foo" android:title="@string/foo" android:icon="@drawable/ic_foo" appcompat:showAsAction="always" />
    <item android:id="@+id/bar" android:title="@string/bar" appcompat:showAsAction="never"  />
    
</menu>