转载：http://blog.csdn.net/jayyuz/article/details/55260996

@Override

public boolean onCreateOptionsMenu(Menu menu) {

    getMenuInflater().inflate(R.menu.menu_test, menu);

    MenuItem item = menu.findItem(R.id.menu_test);

    SpannableString spannableString = new SpannableString(item.getTitle());

    spannableString.setSpan(new ForegroundColorSpan(Color.WHITE), 0, spannableString.length(), 0);

    item.setTitle(spannableString);

    return super.onCreateOptionsMenu(menu);

}