solve overflow menu icon not showing bug on android.support.v7.widget.Toolbar

TestAcitvity.java

    /**
     * solve overflow menu icon not showing bug on {@link android.support.v7.widget.Toolbar}
     *
     * @see <a href="http://stackoverflow.com/questions/30076392/how-does-this-strange-condition
     * -happens-when-show-menu-item-icon-in-toolbar-over">StackOverflow question<a/>
     */
     @Override
    protected boolean onPrepareOptionsPanel(View view, Menu menu) {
        if (menu != null) {
            if (menu.getClass().getSimpleName().equals("MenuBuilder")) {
                try {
                    Method m = menu.getClass().getDeclaredMethod(
                            "setOptionalIconsVisible", Boolean.TYPE);
                    m.setAccessible(true);
                    m.invoke(menu, true);
                } catch (Exception e) {
                    Timber.e(getClass().getSimpleName(), "onMenuOpened...unable to set icons for overflow menu", e);
                }
            }
        }
        return super.onPrepareOptionsPanel(view, menu);
    }