I have to create an apk file from the files that I have extracted from the same app using reverse engineering. Can someone help me to create the app using the xml and java files that i have got. ?
I would recommend you to copy it to an IDE like Android Studio. Simply create a new Project and add the files on their directories.
The app might have some dependencies that you can only add using gradle build. So re-zipping the app and giving it the apk extension might not be enough.