detecting three presses of power button

Question

I'm new in Android. I'm trying to make an app that will run in background and detect three rapid presses of the power button. I've looked up a lot, but could not clear my confusion. can anyone please give me some suggestion? TIA.

score 1 · Accepted Answer · answered Jan 27 '14 at 16:58

Declare the static variable outside the onKeyDown and increment variable inside the onKeyDown and return if the value is equal to 3 and at the end again equal the static variable equal to 0;

static int i=0;
public boolean onKeyDown(int keyCode, KeyEvent event) {
    if (event.getKeyCode() == KeyEvent.KEYCODE_POWER) {
       i++;
        if(i==3){
    //do something

//at the end again i=0;
        }

    }
    return super.onKeyDown(keyCode, event);
}

thank you a lot for your help. really appreciate it. – user2755646 Jan 27 '14 at 18:43 — user2755646, Jan 27 '14 at 18:43

score 0 · Answer 2 · answered Jan 27 '14 at 16:56

You could listen for every press of the power button, then in your listener you could

measure how many presses you have just made up to this point
measure the time between your current press and your last press
if your time interval is right (say 200 ms) then increment your n_presses and do whatever you want after you reach 3 presses (e.g. create a super event and send it to a thread to process it)

detecting three presses of power button

2 Answers2

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