TestFrameLayout.kt

class TestFrameLayout @JvmOverloads constructor(
    context: Context, attrs: AttributeSet? = null, defStyleAttr: Int = 0
) : FrameLayout(context, attrs, defStyleAttr) {

    private val paint: Paint = Paint()

    init {
        clipChildren = false
        clipToPadding = false
        paint.color = Color.WHITE
        // change this number to match your expertise.
        paint.setShadowLayer(
            10f, 0f, 10f,
            ContextCompat.getColor(context, R.color.shadow)
        )
        paint.xfermode = PorterDuffXfermode(PorterDuff.Mode.ADD)

        setShadow(R.color.shadow, R.dimen.radius, R.dimen.evl, backgroundColorResource = R.color.bg)

        setLayerType(LAYER_TYPE_SOFTWARE, null)
    }

    override fun onDraw(canvas: Canvas?) {

        super.onDraw(canvas)

        canvas?.run {
            save()
            translate((canvas.width / 2).toFloat(), CIRCLE_RD)
            drawCircle(0f, 0f, CIRCLE_RD, paint)
            restore()
        }

    }

    companion object {
        const val CIRCLE_RD = 100f
    }
}