gradle-rename-apk

def manifestVersionName() {
    def manifestFile = file(project.projectDir.absolutePath + '/AndroidManifest.xml')
    def ns = new groovy.xml.Namespace("http://schemas.android.com/apk/res/android", "android")
    def xml = new XmlParser().parse(manifestFile)
    return xml.attributes()[ns.versionName].toString()
}

def manifestVersionCode() {
    def manifestFile = file(project.projectDir.absolutePath + '/AndroidManifest.xml')
    def ns = new groovy.xml.Namespace("http://schemas.android.com/apk/res/android", "android")
    def xml = new XmlParser().parse(manifestFile)
    return xml.attributes()[ns.versionCode].toString()
}

project.ext.versionName = manifestVersionName()
project.ext.versionCode = manifestVersionCode()

def appendVersionNameVersionCode(variant) {
    if(variant.zipAlign) {
        def file = variant.outputFile
        def fileName = file.name.replace(".apk", "-" + project.ext.versionName + "-" + project.ext.versionCode + ".apk")
        variant.outputFile = new File(file.parent, fileName)
    }

    def file = variant.packageApplication.outputFile
    def fileName = file.name.replace(".apk", "-" + project.ext.versionName + "-" + project.ext.versionCode + ".apk")
    variant.packageApplication.outputFile = new File(file.parent, fileName)
}