I have a box in my MainActivity that I want to draw sound data I’m recording from the mic. I can’t get box view to call onDraw again and update from data I’m getting from an AsyncTask.

I have my view class in its own file..

public class MyView extends View {...
  int radius = 0;

  public start(MainActivity acitivity){
    new MyAsyncTask(activity).execute();
  }
  @Override
  protected void onDraw(Canvas canvas){
    canvas.DrawCircle(contentWidth >> 1, contentHeight >> 1, radius, circlePaint);

  @Override
  protected void invalidate()...

  public static class MyAsyncTask extends AsyncTask{...
    @Override
    protected void onProgressUpdate(int newRadius){
      radius = newRadius;
      activityReference.get().findViewById(R.id.my_view).invalidate();

My MainActivity..

public class MainActivity..
  onCreate(){
    MyView myView = findViewById(R.id.my_view);
    myView.setWillNotDraw(false);
    myView.start(this);

My app draws a circle but won’t update. I’m continually calling invalidate from my AsyncTask’s onProgressUpdate but onDraw is never called again.