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.

Answer 1

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);
}

Answer 2

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)