Android - How to draw an arc based gradient

Question

I am trying to create an arc (variable number of degrees) that gradually goes from one color to another. From example from blue to red:

Answer 1

five years later, but the right way is make 0.749f with 0.750f of the separate line, simple code is like:

    val colors = intArrayOf(0xffff0000.toInt(), 0xff0000ff.toInt(), 0xffff0000.toInt(), 0xffff0000.toInt())
    val positions = floatArrayOf(0.0f, 0.749f, 0.750f, 1.0f)