android - 添加带有子菜单项的图标

Question

我制作了包含一些项目的子菜单。现在我想用子菜单项添加不同的图标。我还将代码应用于添加图标的菜单项，但它没有显示图标我的代码是这样的:

public boolean onCreateOptionsMEnu(Menu m) {
    SubMenu s1 = m.addSubMenu("menu1");
    s1.add(0,0,1,"1").setIcon(R.drawable.icon1);
    s1.add(0,1,2,"2").setIcon(R.drawable.icon2);

    return super.onCreateOptionsMenu(m);
}

Answer 1

子菜单不支持图标。

https://developer.android.com/guide/topics/ui/menus.html :

Icon Menu
This is the collection of items initially visible at the bottom of the screen at the press of the MENU key. It supports a maximum of six menu items. THESE ARE the only menu items that support icons and the only menu items that do not support checkboxes or radio buttons.