GradientDrawable setStroke Doesn't Work on Android Lollipop

Question

I have a Drawable inside an image view that I'm modifying at runtime in order to provide custom colors for a user's rank. The method for modifying this works fine on Android versions below 20, but above it the drawable fails to update consistently.

The particular method in question looks like:

void setColor(int color) {
    GradientDrawable drawable = (GradientDrawable) mImageView.getDrawable().mutate();
    drawable.setStroke(14, color);
    drawable.invalidateSelf(); // make sure we redraw
}

As I said, this works fine before Android 20, but after Android 20 the drawable doesn't add the stroke. Is there a new method or did I forget something?

Answer 1

you should invalidate the view:

mImageView.invalidate();