Tap on screen 5 Times in 3 seconds in android

I am developing a kiosk and now in admin side. In order to go to the Admin, the user needs to tap the screen 5 times just in 3 seconds or else, nothing will happen.

Please read the comments in the code, it is quite straightforward

import android.app.Activity;
import android.os.Bundle;
import android.view.MotionEvent;
 
public class MainActivity extends Activity {
   
private int tapCount = 0;
private long tapCounterStartMillis = 0;

//detect any touch event in the screen (instead of an specific view)

@Override
public boolean onTouchEvent(MotionEvent event) {  
    
    int eventaction = event.getAction();
     if (eventaction == MotionEvent.ACTION_UP) {
     
     //get system current milliseconds
     long time= System.currentTimeMillis();


     //if it is the first time, or if it has been more than 3 seconds since the first tap ( so it is like a new try), we reset everything 
     if (tapCounterStartMillis == 0 || (time-tapCounterStartMillis > 3000) ) {
         tapCounterStartMillis = time;
         tapCount = 1;
     }
     //it is not the first, and it has been  less than 3 seconds since the first
     else{ //  time-tapCounterStartMillis < 3000   
         tapCount ++;
     }
     
     if (tapCount == 5) {
        //do whatever you need
     }
     return true;    
    }
    return false;
  }