If you don’t need automatically generated apk files with unaligned suffix (which you probably don’t), you may add the following code to build.gradle file:
// delete unaligned files
android.applicationVariants.all { variant ->
variant.assemble.doLast {
variant.outputs.each { output ->
println "aligned " + output.outputFile
println "unaligned " + output.packageApplication.outputFile
File unaligned = output.packageApplication.outputFile;
File aligned = output.outputFile
if (!unaligned.getName().equalsIgnoreCase(aligned.getName())) {
println "deleting " + unaligned.getName()
unaligned.delete()
}
}
}
}From here