[Android] Android APK Anti-compilation detailed

Android applications are developed in Java, through Google's guidance, to achieve and summarize the APK file anti-compilation process, not difficult, need the appropriate tools.

One, APK anti-compilation get Java source code

Download the anti-compilation toolkit above, open the dex2jar-0.0.9.9 folder under the Apk2java directory, including the APK decompile to Java source Tools, as well as the Source view tool.

APK Anti-compilation tool Dex2jar, is to convert the Classes.dex in the apk into a jar file

Source View tool Jdgui, is an anti-compilation tool that can directly view the source code of the anti-compiled jar package

Dex2jar and Jdgui The latest version of the download, see Google Code:

Dex2jar (Google Code)

Jdgui (Google code), the latest version please see the official

Specific steps:

First, change the apk file suffix to zip and unzip, Get the Classes.dex, it is the Java file compiled and then packaged by the DX tool, the Classes.dex copy to D2j-dex2jar.bat directory dex2jar-0.0.9.9 folder.

Under command line, navigate to the directory where the D2j-dex2jar.bat is located, run

D2j-dex2jar.bat Classes.dex

Generated

Classes_dex2jar.jar

Then, go to the Jdgui folder double-click Jd-gui.exe, open the above generated jar package Classes_dex2jar.jar, you can see the source code, such as:

Helloandroid source code in the anti-compilation before and after the comparison is as follows:

The source code and pictures, XML configuration, language resources and other files of apk decompile Generator

This is especially useful if you have a Chinese software.

The first is to download the above anti-compilation toolkit, where the latest apktool, please go to google code download

Apktool (Google Code)

Specific steps:

Download the anti-compilation toolkit above, open the apktool1.4.1 folder in the Apk2java directory, containing three files: Aapt.exe,apktool.bat,apktool.jar

Note: The Apktool_bk.jar inside is the old version of the backup, preferably with the latest Apktool.jar

Under command line, navigate to the Apktool.bat folder and enter the following command:apktool.bat d-f abc123.apk abc123, such as:

, Apktool.bat command line explanation: Apktool.bat d-f [apk file] [output folder]

The following files are deserialized (Androidmanifest.xml, for example):

To repackage the finished file into an apk, it is easy to enter Apktool.bat b abc123(you compiled the folder), the command is as follows:

After packaging the apk file under directory C:\HelloAndroid, two folders were generated:

Build

Dist

wherein, the package generated helloandroid.apk, in the above Dist folder, Ok

Three, graphical anti-compilation apk

Step one or two above describes the command-line anti-compilation apk, which now provides a graphical anti-compilation tool: Androidfby

First, download the Anti-compilation toolkit above, open the Androidfby directory, double-click the Android Anti-compilation tool,. exe, you can browse to open the apk you want to decompile

This article compiles the history version of the Toolkit:

Android Anti-compilation Toolkit (upgrade) (2012-10-10)

Android Anti-compilation tool (2012-08-21)

Android Anti-compilation tool (2011-08-28)

Reference recommendation:

How Android prevents the APK program from being recompiled