apk inspector

İnstalling firstt 
Windows:

1. Download Windows wrapper script (Right click, Save Link As apktool.bat)
2. Download apktool-2 (find newest here)
3. Rename downloaded jar to apktool.jar
4. Move both files (apktool.jar & apktool.bat) to your Windows directory (Usually C://Windows)
5. If you do not have access to C://Windows, you may place the two files anywhere then add that directory to your Environment Variables System PATH variable.
6. Try running apktool via command prompt

then put in same directory the apk u want to decompile and

run cmd and go to directory a.apk

and apktool if a.apk

and apktool d a.apk d:\a\decompiledapk

extra link