Hi,
I can give a proper working code without any bugs and with comparatively good UI. I'll try to complete the whole thing before the mentioned time, so that you can check if everything is proper or not. The only request i have is you have to be in contact with me for the 3 days, at-least reply to my mails in 30 min or so. So, if everything is fine for you then you can have your required app before the allotted time. Also the code will be well organized so that it will be very helpful to you for later reference (if needed). Though i am a new freelancer, i have good experience working with Android. Also, i'm good in coding. So, you can expect good results from me.
Expected schedule will be something as follows:
1st day: implementing the basic music player functions and adding the feature to detect the devices (connected by bluetooth) and songs played.
2nd day: UI design and testing the app thoroughly and debugging the app and reporting to you for any changes
3rd day: adding those changes and implementing the optional features and reporting you by that night
Hoping to hear from you soon.
Regards
Ravi