Android add Stroke to Drawable on Runtime

I found this function. How can I now add a Stroke to my Drawable?

There is nothing 开发者_开发技巧like setStroke(...)

Try creating a paint variable with the your intended color/stroke width/ (also set style=stroke) and then use it in the onDraw method:

onDraw(Shape shape, Canvas canvas, Paint paint)

In this way, the stroke will be added when you draw. It will not be attached to your Drawable.