I create an AAR and extract it then I convert classes.jar to dex file by this :
C:\Users\ms\AppData\Local\Android\Sdk\build-tools\29.0.3>dx --dex --output classes.dex classes.jar
But after that I create an obfuscate AAR and extract it, When I tried convert classes.jar to dex file, I get this error:
C:\Users\ms\AppData\Local\Android\Sdk\build-tools\29.0.3>dx --dex --output classed.dex classes.jar
no classfiles specified
What's the reason?
I found the problem, the proguard-rules.pro file was empty.