menu键菜单显示图标：

import java.lang.reflect.Method;
......

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        MenuInflater inflater = getMenuInflater();
        inflater.inflate(R.menu.fm_action_bar_funui, menu);
        try {
            Class<?> clazz = Class.forName("com.android.internal.view.menu.MenuBuilder");
            Method m = clazz.getDeclaredMethod("setOptionalIconsVisible", boolean.class);
            m.setAccessible(true);
            m.invoke(menu, true);

        } catch (Exception e) {
            e.printStackTrace();
        }
return true;
    }