Also, I've seen that Tuifan said: Wait until the file is decompiled, this takes a while!
but the problem is I've waited ridiculously for more than 4 hours and the decompiling didn't finished.
It stuck in the appname.jar building process and no move!
I've downloaded the new version of APK Studio and its working find and fast, but it doesn't generate Jar file.
What should I do now? is there any other application to give me the jar file.