Android drawing a line to follow your finger

Question

What I want to do is to draw a line that will follow my finger. I\'ve created a custom view, and I have an onTouchEvent() that works.

I can draw a sta

Answer 1

A touch event is associated with a list of pointer counts retrievable like the following:

     int p = event.getPointerCount();

iterating over these and drawing points can cause a continuous line to appear

if (event.getAction() == MotionEvent.ACTION_MOVE
    || event.getAction() == MotionEvent.ACTION_DOWN) {

  int p = event.getPointerCount();
     for (int i = 0; i < p; i++) { 
       c.drawPoint(event.getX(i), event.getY(i), paint);
     }
}

Assuming paint is already set and c is the canvas, which may need to be locked (Eg- in a multithread application), prior to drawing on it.