Keep folders while converting jar to dex

Question

I want to convert my jar to dex: dx --dex --output=file.dex file.jar. In file.jar exists folder cnf/ which contains configuration files needed for my classes. But there is no folder cnf/ in resulting dex-file.

How to keep all files and folders in dex-file while converting?

Answer 1

This isn't possible, there's no way to store arbitrary files in a dex file. The closest you can get would be to create an "android" jar file, with the dex file as a classes.dex entry, along with anything else you want to put in it, such as the cnf folder.

Answer 2

You can put cnf/ in APK file. APK is a ZIP archive. After unpacking on device cnf/ folder would be in classpath so it should work the same as inside JAR.

1. After a build remove MANIFEST.MF and certificates from META-INF folder inside APK;

   zip -d file.apk "META-INF/*"
   

2. Add your resources (cnf/) to APK;

   aapt add -v file.apk cnf/*
   

3. Re-sign APK. Here's an example using the default debug key:

   jarsigner -verbose -sigalg SHA1withRSA -digestalg SHA1 -keystore ~/.android/debug.keystore file.apk androiddebugkey