Example of using FloatPropertyCompat for SpringAnimations.

FloatPropertyCompatExamples.kt

private val floatPropertyAnimX = object : FloatPropertyCompat<ColorDropperView>(PROPERTY_X) {
    override fun setValue(dropper: ColorDropperView?, value: Float) {
        dropper?.setDropperX(value)
    }

    override fun getValue(dropper: ColorDropperView?): Float {
        return dropper?.getDropperX() ?: 0f
    }
}

private val floatPropertyAnimY = object : FloatPropertyCompat<ColorDropperView>(PROPERTY_Y) {
    override fun setValue(dropper: ColorDropperView?, value: Float) {
        dropper?.setDropperY(value)
    }

    override fun getValue(dropper: ColorDropperView?): Float {
        return dropper?.getDropperY() ?: 0f
    }
}