java如何将eclipse项目导入安卓 studio？

Question

我在eclipse中有一个大型的主要项目和几个子项目。一些子项目与主项目有依赖关系。现在，我想将这些项目导入Android Studio。我尝试使用Eclipse导出它们并生成build.gradle文件。之后，我使用Android Studio导入它们。但也存在一些问题

My sub projects can't find .java files in major project, so sub projects can't build successful.

那么，我该怎么解决它呢？原谅我糟糕的英语，谢谢

Update: I found that the sub project is also a com.安卓.application and it seems that a com.安卓.application(sub project) can't depends on other com.安卓.application (major project). What should I do?