Make an alert if eyelid closed more than 3 seconds

Question

I want to make an alert after the user's eyelid is closed for more than 3 seconds but I have a problem with my code. How can I make the boolean right_eye and boolean left_eye trigger the alert after 3 seconds it closed? Here is some code that I wrote.

public void eyeTracking(FirebaseVisionFace face){
    boolean right_eye = face.getRightEyeOpenProbability() < 0.5;
    boolean left_eye =  face.getLeftEyeOpenProbability() < 0.5;
    Handler mHandler = new Handler();
    Runnable runnable = new Runnable() {
        @Override
        public void run() {

        }
    };

    if (right_eye && left_eye) {
        begin = System.currentTimeMillis();
        Log.d(TAG, "eyeTracking: " + sleep);
        mHandler.postDelayed(runnable, 3000);
        sleep = true;
    }
    else {
        sleep = false;
    }

    if(sleep){
        stop = System.currentTimeMillis();
        Log.d(TAG, "eyeTracking: " + begin + "stop" + stop);
        if(begin - stop >= 3000) {
            alertBox();
        }
    }
}

when i try log my begin and stop variable it returns same value does i do it wrong?

Answer 1

You should not set your begin variable every time you detect eye is closed. Try this bellow code on your project. Hope this will help you:

  long begin=0;
  public void eyeTracking(FirebaseVisionFace face){
    boolean right_eye = face.getRightEyeOpenProbability() < 0.5;
    boolean left_eye =  face.getLeftEyeOpenProbability() < 0.5;

    if (right_eye && left_eye) {
        //if your begin variable is reset
        if(begin==0){
        begin = System.currentTimeMillis();
        }
        Log.d(TAG, "eyeTracking: " + sleep);
        sleep = true;
    }
    else {
        //reset your begin variable
        begin=0;
        sleep = false;
    }

    Log.d(TAG, "Eyes closed time: "+System.currentTimeMillis()-begin);
    if(sleep && System.currentTimeMillis()-begin>3000){
        Log.d(TAG, "Show alert");
            alertBox();
    }
}