Radar animation android

Question

So here is the thing. I am monitoring certain distances, and i would like to display them in a radar animation. The base radar image would be something like this (not exactl

Answer 1

"I am monitoring certain distances" ~ What does that mean?

To make a radar create a class that extends ImageView. Override onDraw(Canvas canvas) and set the image resource to a radar background.

 @Override
 public void onDraw(Canvas canvas) {
     //draw background
     super.onDraw(canvas);

     for(PointF p : points)
     {
         //draw each point as an image.  Maybe, translate by width/2 and height/2
     }
 }