publishing.gradle

if (project.plugins.hasPlugin("com.android.library")) {

    apply plugin: 'digital.wup.android-maven-publish'

    project.afterEvaluate {
        task sourcesJar(type: Jar) {
            from android.sourceSets.main.java.srcDirs
        }
    }

    publishing {
        publications {
            aar(MavenPublication) {
                from project.components.android
                artifact project.sourcesJar {
                    // not required, includes sourcesJar with correct classifier
                    classifier "sources"
                }
                groupId project.ext.group
                artifactId project.name
                version project.ext.version
            }
        }

        repositories {
            maven {
                name 'Bintray'
                url "https://api.bintray.com/maven/${project.org}/${project.repo}/${project.name}/;publish=1"

                credentials {
                    username BINTRAY_USERNAME
                    password BINTRAY_API_KEY
                }
            }
        }
    }
}