Dex2JAR

Description

Dex2JAR is a tool to work with android .dex and java .class files.

dex2jar consists of a collection of Java libraries that can streamline development tasks for Android related concepts and can simplify APK projects.

The download package includes, aside from the set of development libraries, a suite of script files (in BAT format), which can automate various programming tasks.

The components comprised in the package are compiled, therefore they’re ready to use. Of course, you can also modify them to improve functionality as the libraries are open source.

The first one consists of a lightweight API that provides the possibility to read DEX (Dalvik Executable) and ODEX files, which are proprietary formats for Android development.

With the second library, DEX translator, programmers will be able to convert DEX files to ASM format. The principle used by this component uses a DEX reader which optimizes the instructions prior to the conversion operation.

The third one, namely DEX-IR, serves to interpret DEX instructions and is used by the previous DEX component for the DEX reading process.

Last, but not least, DEX-Tools is a multi-purpose library that can work with CLASS files in order to perform tasks such as APK modifications or JAR deobfuscation.

The conclusion is that all of the components work together in order to automate Java and Android programming tasks. In addition, the collection of out-of-the-box scripts make an essential collection of tools that developers can use to manipulate project resources.

Usage

Syntax

d2j-dex 2 jar [options] <file0> [file1 … fileN]

Options

 -d,--debug-info              translate debug info
 -e,--exception-file <file>   detail exception file, default is
                              $current_dir/[file-name]-error.zip
 -f,--force                   force overwrite
 -h,--help                    Print this help message
 -n,--not-handle-exception    not handle any exception throwed by dex2jar
 -o,--output <out-jar-file>   output .jar file, default is
                              $current_dir/[file-name]-dex2jar.jar
 -os,--optmize-synchronized   optmize-synchronized
 -p,--print-ir                print ir to Syste.out
 -r,--reuse-reg               reuse regiter while generate java .class
                              file
 -s                           same with --topological-sort/-ts
 -ts,--topological-sort       sort block by topological, that will
                              generate more readable code

Example

cyborg@cyborg:~$ d2j-dex2jar -f classes.dex
dex2jar classes.dex -> classes-dex2jar.jar
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