Its typical of a start-up co-founder or start-up CTO in facing the need for an android developer to offer to talk to some developer over coffee. But, I do not do coffee.
In code auditing 80+ android UI libraries which back ported features I can tell you due to me having some best android practices enforced in my manual engineering habits that I really am not in any mood to waste my time over talks over coffee. If you want waste over developer's time or yours that is up to you. But I can assure that my recent code audit proves that there is no general correlation between a resume and quality android java code output.
That alone should shock you enough to stop using the broken hiring system and try something better.