build.gradle

// Top-level build file where you can add configuration options common to all sub-projects/modules.
Properties properties = new Properties()
properties.load(project.rootProject.file('local.properties').newDataInputStream())

buildscript {
    repositories {
        jcenter()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:2.1.0'

        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle files
        classpath 'com.jfrog.bintray.gradle:gradle-bintray-plugin:1.3.1'
        classpath 'com.github.dcendents:android-maven-gradle-plugin:1.3'
    }
}

allprojects {
    repositories {
        // 新添加开始
        maven {
            url properties.getProperty("sdk.dir")+"/extras/android/m2repository"
        }
        mavenLocal()
        // 新添加结束
        jcenter()
    }
}

task clean(type: Delete) {
    delete rootProject.buildDir
}