实际上是没有问题的。项目编译和运行。但我不明白是什么意思三振类名（Android的工作室讲述，有去precated code时）。有人能解释一下吗？

Actually there is no problem. Project compiles and runs. But I can't understand what is mean strikeout class name (Android Studio tells that there is deprecated code is used). Can anybody explain?

推荐答案

由于版本的 22.1.0 的，类 ActionBarActivity 是德precated。您应该使用 AppCompatActivity 。

Since the version 22.1.0, the class ActionBarActivity is deprecated. You should use AppCompatActivity.

阅读这里和的此处了解更多信息。

Read here and here for more information.