Following the trend of the moment, I play a bit with the sample of DroidKungFu retrieved from the contagiodump malware sample repository. For obtaining the JAR archive I used dex2jar (http://code.google.com/p/dex2jar/downloads/list) after that I extracted the Dalvik Executable Format embedded in the APK. Once obtained the JAR file is very easy obtain the clear code with (for example) Java
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