build.gradle

// Top-level build file where you can add configuration options common to all sub-projects/modules.

buildscript {
    repositories {
        jcenter()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:2.3.3'

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

allprojects {
    repositories {
        jcenter()

        flatDir {
            // cameralib module中引用了google-cameraview库的 aar，在多 module 的情况下，
            // 其他的module编译会报错，所以需要在所有工程的repositories
            // 下把cameralib module中的libs目录添加到依赖关系中
            dirs project(':cameralib').file('libs')
        }
    }
}

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