How to convert .jar or .class to .dex file?

Question

I\'m going to edit Opera Mini v6.5 server because it is blocked in our country.

Now I have unpacked the .apk file extracted classes.Dex then converted it via dex2jar

Answer 1

Sounds like you need the apktool, it allows you to repack and resign a apk, without the need to get in to running dx and aapt yourself.

Here's an article on how to unpack and repack