1.) Front page to search nearby Bluetooth device
2.) Then, 2nd page to show Bluetooth button and voice command that programmable
3.) Lock the 2nd page so that not able to be modified by end user.
4.) App is upload-able to google app store
hii I'm jai an Android developer with experience of 5 years I can build you Bluetooth app according to your requirements I have gone through file and I can complete app within 5days ping me ro discuss further