apktool 作用是重新打包修改过的apk，重新签名
- Download Windows wrapper script (Right click, Save Link As apktool.bat)
- Download apktool-2 (find newest here)
- Rename downloaded jar to apktool.jar
- Move both files (apktool.jar & apktool.bat) to your Windows directory (Usually C://Windows)
- 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.
- Try running apktool via command prompt