问题
Could not find gradle.jar (com.android.tools.build:gradle:3.1.2)
Searched in the following locations
https://jcenter.bintray.com/com/android/tools/build/gradle/3.1.2/gradle-3.1.2.jar
解决方法
把版本号改一下,然后是右上角更新
distributionUrl=https\://services.gradle.org/distributions/gradle-4.10.1-all.zip