I am trying to subclass ImageView to create a custom view.

```
public class MyImageView extends ImageView

```

Now I pass to MyImageView an image via `setImageResource(int resId)`

Now, I need to get the original dimensions of the image passed, 

I need to do that from inside `MyImageView` so that I can use the dimension for my implementation of `onDraw()`.

How do I do that?