Gradle project sync failed. Please fix your project and try again | gradle's dependency cache may be

Studio更新中出现：

Gradle project sync failed. Please fix your project and try again 

gradle's dependency cache may be corrupt

解决：

1.如果可以翻越长城就翻过去下载；

2.删除 .gradle 文件，重新加载；

3.在gradle-wrapper.properties里修改gradle的版本。