怎么样黑客新闻公测应用有使用冰淇淋三明治4.0 UI在他们的应用程序，并在一次工作，而在2.3姜饼和2.2 Froyo的任何问题？我想创建应该在4.0和有这样的向后兼容的应用程序，但怎么办呢？

How apps like Hacker News beta have use the Ice Cream Sandwich 4.0 UI on their app and at time work without any problems on 2.3 Gingerbread and 2.2 Froyo? I want to create apps that should work on 4.0 and have backward compatibility like that, but how to do it?

推荐答案

许多应用程序也使用的ActionBar福尔摩斯支持动作条UI。它是建立在那bobygerm提到的支持包顶部。

Many apps also use ActionBar Sherlock to support the ActionBar UI. It's built on top of the Support Package that bobygerm mentioned.