 <p>Normally, when you build your APK, all the libs you have imported (jars) are included and transformed to dex files, as the rest of your code. So, yes all the classes are included, even if you don't use them. You can use Proguard to remove them from the APK. Look at this post : <a href="http://stackoverflow.com/questions/14288769/use-proguard-for-stripping-unused-support-lib-classes">Use Proguard for stripping unused Support lib classes</a></p>