Sounds like you want to decode an application without disassembling the
classes.dex
file to smali. In Apktool you can utilize the
-s / --skip-sources
parameter to avoid this. Apktool will simply pass on the
classes.dex
instead of disassembling it.
Then you can modify it directly however you are. Then recompile with (
apktool b
) and it will copy the
classes.dex
into final built apk.
eg:
java -jar apktool_2.3.4.jar -s d crackme02.apk