basic image picker using kotlin and jetpack compose

ImagePicker.kt

@Composable
fun ImagePicker() {
    var imageUri: Uri? by remember {
        mutableStateOf(null)
    }   
    val launcher =
        rememberLauncherForActivityResult(contract = ActivityResultContracts.OpenDocument()) {
            it?.let { uri ->
              imageUri = uri
            }
        }
    Column(
        modifier = Modifier
            .fillMaxSize(),
        horizontalAlignment = Alignment.CenterHorizontally,
        verticalArrangement = Arrangement.spacedBy(16.dp, Alignment.CenterVertically)
    ) {
        AsyncImage(
            model = imageUri,
            contentDescription = null,
            modifier = Modifier
                .size(200.dp),
            contentScale = ContentScale.Crop
        )
        Button(
            onClick = {
                launcher.launch(arrayOf("image/*"))
            }
        ) {
            Text(text = "Pick Image")
        }
    }
}