ruthwikkk

@Composable
fun BlurSurface(
    modifier: Modifier,
    parent: ViewGroup
) {
    Surface(
        modifier = modifier,
        color = Color.Transparent
    ) {
        AndroidView(

ruthwikkk

    private fun blurWithRenderScript() {
        val renderScript = RenderScript.create(context)
        val blurScript = ScriptIntrinsicBlur.create(renderScript, Element.U8_4(renderScript))

        val inAllocation = Allocation.createFromBitmap(renderScript, bitmap)
        val outAllocation = Allocation.createTyped(renderScript, inAllocation.type)
        blurScript.setRadius(20f)
        blurScript.setInput(inAllocation)

        blurScript.forEach(outAllocation)

ruthwikkk

fun getBackgroundAndDrawBehind(parent: ViewGroup) {
        //Arrays to store the co-ordinates
        val rootLocation = IntArray(2)
        val viewLocation = IntArray(2)

        parent.getLocationOnScreen(rootLocation) //get the parent co-ordinates
        this.getLocationOnScreen(viewLocation) //get view co-ordinates

        //Calculate relative co-ordinates
        val left: Int = viewLocation[0] - rootLocation[0]

ruthwikkk

AndroidView(
  factory = {
    BlurSurfaceView(context)
  },
  modifier = Modifier
    .size(180.dp),
  update = { blurView ->
    blurView.getBackgroundAndDrawBehind(
      parent = rootView //Pass rootView here

ruthwikkk

fun getBackgroundAndDrawBehind(parent: ViewGroup) {
        canvas?.save()
        canvas?.let {
            parent.draw(it)
        }
        canvas?.restore()
    }

ruthwikkk

val decorView = window.decorView
val rootView = decorView.findViewById(android.R.id.content) as ViewGroup

ruthwikkk

class MainActivity : ComponentActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)

        setContent {
            Theme {
                Surface(
                    modifier = Modifier.fillMaxSize(),
                    color = Color.Black
                ) {

ruthwikkk

class BlurSurfaceView: View {
    private var canvas: Canvas? = null
    private lateinit var bitmap: Bitmap

    constructor(context: Context) : super(context)

    constructor(context: Context, attrs: AttributeSet?) : super(context, attrs)

    override fun onSizeChanged(w: Int, h: Int, oldw: Int, oldh: Int) {
        super.onSizeChanged(w, h, oldw, oldh)