use zipflinger to add files to an APK w/ a groovy script

zfe-test.groovy

import java.util.zip.ZipInputStream

def zis = new ZipInputStream(new FileInputStream(args[0]))
def entryCounter = 0
while (temp = zis.getNextEntry()) {
    entryCounter++
    if (!temp.name && !temp.size) {
        println "Found virtual entry #${entryCounter}"
    }
}

zipflinger.groovy

import com.android.zipflinger.BytesSource
import com.android.zipflinger.ZipArchive
import java.util.zip.Deflater

def archive = new ZipArchive(new File("foo.apk"))
def file = new File("LICENSE.GPLv3")
def source = new BytesSource(file, file.name, Deflater.BEST_COMPRESSION)
archive.add(source)
archive.close()