Appendix D: Comments in XML and Java – it’s crucial to create a documentation of Android app

This would be short, but very useful appendix. When you’re programing you know at that specific moment very well what for are some variables, why are you using some methods, how are you going to implement some classes and so on. But two weeks later – believe us – you will spend as much time on trying to understand your existing code as developing new one unless… you add comments.

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