利用dex2jar和jd
利用dex2jar和 jd-gui 反编译apk文件，得到其源代码！！ 1、把dex文件反编译为jar文件的工具。（dex2jar） http://code.google.com/p/dex2jar/downloads/list 下载 dex2jar-0.0.9.8 http://download.csdn.net/detail/niejing654092427/4393620 2、把jar反编
利用dex2jar和jd-gui反编译apk文件，得到其源代码！！
1、把dex文件反编译为jar文件的工具。（dex2jar）
http://code.google.com/p/dex2jar/downloads/list
下载 dex2jar-0.0.9.8
http://download.csdn.net/detail/niejing654092427/4393620
2、把jar反编译为java的工具。（JD-GUI）
下载jd-gui
http://download.csdn.net/detail/niejing654092427/4393617
1.首先找到Android软件安装包中的classes.dex
把apk文件改名为.zip，然后解压缩其中的classes.dex文件，它就是java文件编译再通过dx工具打包成的,所以现在我们就用上述提到的2个工具来逆方向导出java源文件
2.把classes.dex拷贝到dex2jar.bat所在目录。
在windows系统下：
将上面的classes.dex文件copy到d:\dex2jar-0.0.9.8下dex2jar.bat所在的目录中.
Win+R进入命令运行cmd中, 输入如下信息:
按下回车键会出现
即在该目录下生成了 classes_dex2jar.jar 文件
3.运行JD-GUI工具（它是绿色无须安装的）
打开上面的jar文件，即可看到源代码
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