Tap on screen 5 Times in 3 seconds in android

Question

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.

Answer 1

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 count = 0;
private long startMillis=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 (startMillis==0 || (time-startMillis> 3000) ) {
         startMillis=time;
         count=1;
     }
     //it is not the first, and it has been  less than 3 seconds since the first
     else{ //  time-startMillis< 3000   
         count++;
     }

     if (count==5) {
        //do whatever you need
     }
     return true;    
    }
    return false;
  }

}