hello developers how are u /?? am trying to calculate the distance between two android devices !!! using bluetoth.... i have an idea ! but i don`t know if it can be done ... am thinking to send a request to the other device that using the same app and this device reply immediately ! then i will have the time of this operation ... but i need to know ! the speed of bluetoth ray .. do i can calculate the distance and i also know that it`s changes between devices ! because ! the bluetoth hardware ?? any one can tell me how to do this???? using bluetoth !! between two mobiles using the same app.."my app"