使用阿里的：
maven { url 'http://maven.aliyun.com/nexus/content/repositories/google' }
maven { url 'http://maven.aliyun.com/nexus/content/repositories/jcenter' }
maven { url 'http://maven.aliyun.com/nexus/content/groups/public/' }
maven { url "https://jitpack.io" }
mavenCentral()
google()