(Android development decompilation 1. The Java source code download decompilation kit is obtained by decompilating Apk. Open the dex2jar-0.0.9.9 folder under the apk2java directory, which contains the apk decompilation tool to java source code and the source code detection tool. Dex2jar: The apk decompilator tool is used to decompile the classes in apk Jdgui: a source code detection tool that can directly detect the source code of the decompiled jar package. Specific steps: First change the suffix of the apk file to zip and decompress it to get the classs.dex, which is compiled by java files and then packaged by the dx tool. Copy the classs.dex to the dex2jar.bat location directory, the dex2jar-0.0.9.9 folder. Locate the directory of dex2jar.bat at the command line, and run dex2jar.batclasses.dex to generate classes_ Dex2jar.jar Then, enter the jdgui folder, double-click jd-gui.exe, and open the jar package classes generated above_ Dex2jar.jar, you can see the source code. This document includes the following attachments:)