Zipalign implemented in java with 0 dependencies.

Note: I haven't implemented Zip64 handling yet, this might not work on a few apks.

Either you build a jar, import the gradle module, or just copy the classes.

To build a jar, run:

$ ./gradlew jar

and you'll have the built jar in the build/libs directory.

You can use the jar as a library and directly access the ZipAlign class.

import com.iyxan23.zipalignjava.ZipAlign;

FileInputStream zipIn = ...;
FileOutputStream zipOut = ...;

ZipAlign.alignZip(zipIn, zipOut);
// hell yeah it's that easy!

NOTE: The library doesn't do anything to verify if the zip stream given is valid; it assumes everything is valid and skims through bytes. You might need to verify the zip file first.

or just run it as a cli program:

$ ls
unaligned.apk  zipalign-java-1.0.jar
$ java -jar zipalign-java-1.0.jar unaligned.apk aligned.apk
Aligning zip
Zip successfully aligned
$ ls
aligned.apk  unaligned.apk  zipalign-java-1.0.jar