Modify button function Bluetooth headset

There are three buttons, volume, addition and subtraction, and the answer / end button on the General Bluetooth headset. . Now one needs is to make this the answer / end key functions replaced the function keys to speak specifically to change how to achieve it, seeking ideas ah? Great God more, out of it. .

<-! Baidu Button BEGIN -> more Share to: <-! Baidu Button END ->

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There's no answer.