初次尝试

1.下载源码

关注微信公众号《软件安全与逆向分析》，回复【安卓源码】

2.反编译

1 brew install apktool 2 cd chapter2/Crackme0201/app/build/outputs/apk/
3 apktool d ./app-release.apk -o outdir 4 cp -R outdir outdir_rel

3.修改

1 vim chapter2/Crackme0201/app/build/outputs/apk/outdir_rel/smali/com/droider/crackme0201/MainActivity$1.smali 2 
3 92行修改指令 4 
5 if-eqz v0, :cond_0

4.打包

1 apktool b outdir_rel

5.自定义签名

1 keytool -genkey -alias abc.keystore -keyalg RSA -validity 20000 -keystore abc.keystore
2 jarsigner -verbose -keystore abc.keystore -signedjar crackme0201_signed.apk crackme0201.apk abc.keystore

6.真机调试

1 adb install crackme0201_signed.apk