Gradle learning materials:
a new generation of build tools gradle MOOC: https://www.imooc.com/learn/833
Getting Started with Gradle--Only this one: https://www.jianshu.com/p/001abe1d8e95
Gradle practical tutorial: https://blog.csdn.net/davebobo/article/details/54291099
A collection of gradle self-study tutorials for beginners: https://testerhome.com/topics/1867
Gradle Complete Guide (Android): https://www.jianshu.com/p/9df3c3b6067a