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Having an .apk file, is there any way I can get its source code?

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Before that, have you checked if the package is open source? –  ott-- Oct 3 '12 at 20:20

3 Answers 3

up vote 10 down vote accepted

Even if ProGuard was used you still can get some interesting insights. Here is a StackOverflow question with a detailed explanation: Android: Getting source code from an APK file. YouTube video with a detailed guide. And a blog entry about that: How to retrieve source code from an Android APK file.

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If you get lucky and your .apk file wasn't protected by Proguard or analog, you can use APK tool. It is a tool for reverse engineering 3rd party, closed, binary Android apps.

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Apktool does only generate Smali-Code, not Java code - that is a big difference. –  Robert Oct 5 '12 at 7:52

An .apk is simply a .zip file. But unfortunatedly any app build for 'release' will probably be protected by ProGuard.

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