gistfile1.java

@Override
protected void onResume() {
  super.onResume();
  loadImageWhenReady(imageView, mPayload);
}

private static void loadImageWhenReady(final ImageView v, final String url) {
  v.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
    @Override
    public void onGlobalLayout() {
      Picasso.with(v.getContext())
        .load(url)
        .resize(imageView.getMeasuredWidth(), imageView.getMeasuredWidth())
        .centerInside()
        .into(v);
    }
  });
}