官方文档
以下是官方文档，我也是根据官方文档来做的，把之前做的和遇到的问题做了一个总结。
To migrate existing Android projects, simply import them using Android Studio:
In Android Studio, close any projects currently open. You should see theWelcome to Android Studio window.Click Import Non-Android Studio project.Locate the project you exported from Eclipse, expand it, select the build.gradle file and click OK.In the following dialog, leave Use gradle wrapper selected and click OK. (You do not need to specify the Gradle home.)
Android Studio properly updates the project structure and creates the appropriate Gradle build file.
官方android studio文档在http://www.easck.com/tools/studio/index.html
总结
本人也是AS新手，之前一直用eclipse，遇到问题基本上靠google。文中有不妥之处请指正，谢谢。在此留下小弟的android交流群：311536202。有问题希望在群里面讨论，共同学习。
