Android Java 反编译工具：jadx

对于Android 的Java 反编译工具，我最先用的是Dex2Jar， 这个工具用了很长时间，也非常好用。为了有更多的选择，扩展视野，此篇介绍另一个开源的反编译工具jadx！

开源地址：https://github.com/skylot/jadx

我是一个懒人，直接copy开源文档如下，自己凑合着看吧，相信大家看懂应该都没有问题！

Downloads

unstable
from github
from sourceforge

Building
from source

git clone https://github.com/skylot/jadx.git cd jadx
./gradlew dist

(on Windows, use

gradlew.bat

instead of

./gradlew

)

Scripts for run jadx will be placed in

build/jadx/bin

and also packed to

build/jadx-<version>.zip

Run

Run jadx on itself:

cd build/jadx/
bin/jadx -d out lib/jadx-core-*.jar
#or
bin/jadx-gui lib/jadx-core-*.jar

Usage

jadx[-gui] [options] <input file> (.dex, .apk, .jar or .class)
options:
-d, --output-dir        - output directory
-j, --threads-count     - processing threads count
-f, --fallback          - make simple dump (using goto instead of 'if', 'for', etc)
-r, --no-res            - do not decode resources
-s, --no-src            - do not decompile source code
--show-bad-code     - show inconsistent code (incorrectly decompiled)
--cfg               - save methods control flow graph to dot file
--raw-cfg           - save methods control flow graph (use raw instructions)
-v, --verbose           - verbose output
--deobf             - activate deobfuscation
--deobf-min         - min length of name
--deobf-max         - max length of name
--deobf-rewrite-cfg - force to save deobfuscation map
-h, --help              - print this help
Example:
jadx -d out classes.dex

Troubleshooting

Out
of memory error:

Reduce processing threads count (

-j

option)
Increase maximum java heap size:

command line (example for linux):

JAVA_OPTS="-Xmx4G" jadx -j 1 some.apk

edit 'jadx' script (jadx.bat on Windows) and setup bigger heap size:

DEFAULT_JVM_OPTS="-Xmx2500M"

Contribution

To support this project you can:

Post thoughts about new features/optimizations that important to you
Submit bug using one of following patterns:

Java code examples which decompiles incorrectly
Error log and link to public available apk file or app page on Google play

And any other comments will be very helpfull, because at current stage of development it is very time consuming to findnew bugs, design and implement new features. Also I need to prioritize these task for complete
most important at first.