PickImages.kt

// Pick Images Contract - Normally this is for all kind of files.
private val pickImages = registerForActivityResult(ActivityResultContracts.GetContent()) {uri ->
    uri?.let {uri ->
        imageView.setImageURI(uri)
    }
}

// Calling GetContent contract
pickImageButton.setOnClickListener {
    pickImages("image/*")     // We want images, so we set the mimeType as "image/*"
}