First of all, there is no such thing as "short hex ir codes". (Actually, there is, but it is something completely different.) You are likely using the Shirriff library for Arduino, which, if I understand things correctly, provides a something like a partial decode for NEC1 signals and others. This may not be the best place to ask for support for Shiiiff's library... I plan to look into it in the near future. If so, you can use IrMaster (or IrpMaster, from the command line or through Java API), using the protocol nec1-f16: first 8bits for D, next 8 for S, the rest (16) for F; do not forget to prefix the hexadecimal numbers by "0x". Assuming this, the given number corresponds to

0000 006C 0022 0002 015B 00AD 0016 0016 0016 0016 0016 0016 0016 0016 0016 0016 0016 0016 0016 0041 0016 0016 0016 0041 0016 0041 0016 0041 0016 0041 0016 0041 0016 0041 0016 0016 0016 0041 0016 0041 0016 0041 0016 0041 0016 0041 0016 0016 0016 0016 0016 0041 0016 0041 0016 0016 0016 0016 0016 0016 0016 0016 0016 0041 0016 0041 0016 0016 0016 0016 0016 05F7 015B 0057 0016 0E6C

which can be shorter described as NEC1, device = 64, function=207.

I have described in your other thread how to convert this to wave from Java. I do not know Android hardware or the Medial player.