Now you have to change the name of that .apk file with extension .zip. Also change the file name for example supposesyour file name is file.apk and you changed that file1.apk.zip. For example file.apk ...

An Android APK file contains all the open-source Java files used to set up and run the Google Android app. You can extract these files and load them into your local Android SDK, ...

Second, in HomeController.java file, you also have to change 'path' UmlParser umlParser = new UmlParser("class", "path", "diagram"); The umlparser parses the Java files in that path, so you need to ...