Android: Cloning a drawable in order to make a StateListDrawable with filters
Try the following:
Drawable clone = drawable.getConstantState().newDrawable();
If you apply a filter / etc to a drawable created with getConstantState().newDrawable() then all instances of that drawable will be changed as well, since drawables use the constantState as a cache!
So if you color a circle using a color filter and a newDrawable(), you will change the color of all the circles.
If you want to make this drawable updatable without affecting other instances then, then you must mutate that existing constant state.
// To make a drawable use a separate constant statedrawable.mutate()For a good explanation see:
http://www.curious-creature.org/2009/05/02/drawable-mutations/
http://developer.android.com/reference/android/graphics/drawable/Drawable.html#mutate()
This is what works for me.
Drawable clone = drawable.getConstantState().newDrawable().mutate();