It's not clear what you're asking here. You initially asked about creating this file, now you seem to be saying that you already have one.
As stated above, the meaning of a .dct is ambiguous, so you have to be a bit clearer. What you've said so far means it's impossible to give a proper answer.
Visual Foxpro is a Microsoft product. I doubt whether there's any compatibility with Android. Do you have an app that can read these files? Are you wishing to create an app which can generate such a file?