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:2.2.2'
		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 {
        jcenter()
    }

    tasks.withType(Javadoc) {

        options.memberLevel = JavadocMemberLevel.PROTECTED
        options.links("http://docs.oracle.com/javase/7/docs/api/")
        options.links("http://developer.android.com/reference/")
        options.tags = ['sample']
        exclude '**/BuildConfig.java'
        exclude '**/R.java'
    }

}

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