buildscript {
    repositories {
        maven { url "https://maven.google.com" }//添加这个就可以
        jcenter()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:2.3.1'
        classpath 'com.novoda:bintray-release:0.3.4'

        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle files
    }
}

allprojects {
    repositories {
        maven { url "https://maven.google.com" }//添加这个就可以
        jcenter()
    }
}