问题
I got an error with my Android project: Gradle project sync failed error, and then I searched the solution here. However, I deleted wrong file(build.gradle instead of .gradle in the user home directory). So how do I generate build.gradle file in Android Studio again?
回答1:
Open your IDE and just create a file called build.gradlein the root folder if you deleted the top-level file, or inside a module if you deleted it.
It is a text file where you have to write your script.
You can copy the standard configuration, just copying from a new project. Of course you have to customize your file with your dependencies and your configuration.
来源：https://stackoverflow.com/questions/32307280/how-to-regenerate-build-gradle-file-after-deleting