val getContent = registerForActivityResult(GetContent()) { uri: Uri? ->
    // Handle the returned Uri
}

override fun onCreate(savedInstanceState: Bundle?) {
    // ...

    val selectButton = findViewById<Button>(R.id.select_button)

    selectButton.setOnClickListener {
        // Use the Kotlin extension in activity-ktx
        // passing it the mime type you'd like to allow the user to select
        getContent("image/*")
    }
}

setFragmentResultListener("test_data") { key, bandle ->
            val data = bandle.getString("data_test")
            debugLog { "Data $data" }
        }

setFragmentResult("test_data", bundleOf("data_test" to "Hello World"))