how can I add a special function the android phone's volume button?

Question

My question changed. can I do the same thing using volume button instead? (that is, trigger act2 even when the the phone is sleeping)

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Hi I want to write an app making use of the power button. The concept of the app is as follows

Activity1 -->service1-->service2-->service3-->.....-->serviceXX-->Activity2

each class has its won trigger mechanism. what I want to do is: no matter when(whether you started the app or not), press the power button quickly 5 times (5 times in 1 second,not accumulated to 5 times), and it is forced to jump to Activity2. Of course, the original power button function is still maintained, I just want to add an special function to power button. Atfer I stop the app, I want the power function settings stilled memorized by the phone.

Is it possible to do so? Thanks for help!

Answer 1

I want to write an app making use of the power button.

Fortunately, this is not possible.