禁掉menu但是保留actionbar

在activity里面


public boolean dispatchKeyEvent(KeyEvent event) {
    final int keycode = event.getKeyCode();
    final int action = event.getAction();
    if (keycode == KeyEvent.KEYCODE_MENU && action == KeyEvent.ACTION_UP) {
        return true; // consume the key press
    }
    return super.dispatchKeyEvent(event);
}