参考连接：

　　https://www.jianshu.com/p/96875c707f8a

用到的工具下载地址，系统需配置JAVA环境：

Apk-Tool:

     https://www.wiyixiao4.com/tools/apktool.7z

Dex2Jar-Tool:

    https://www.wiyixiao4.com/tools/dex-tools-2.1-SNAPSHOT.zip

    https://www.wiyixiao4.com/tools/dex-tools-2.1-SNAPSHOT.tar

JD-GUI:

    https://www.wiyixiao4.com/tools/jd-gui-windows-1.6.6.zip

Android APK反编译