Simple ActivityResultContract

activityresultcontract.kt

class MyContract : ActivityResultContract<Int, String>() {

    companion object {
        const val ACTION = "com.myapp.action.MY_ACTION"
        const val INPUT_INT = "input_int"
        const val OUTPUT_STRING = "output_string"
    }

    override fun createIntent(input: Int): Intent {
        return Intent(ACTION)
            .apply { putExtra(INPUT_INT, input) }
    }

    override fun parseResult(resultCode: Int, intent: Intent?): String? {
        return when (resultCode) {
            Activity.RESULT_OK -> intent?.getStringExtra(OUTPUT_STRING)
            else -> null
        }
    }
}

it even hard to understand for me, in an example first I have to get the image from take a picture, an image from directory Image o from Camera, What do I have to do for only choose a file from camera pictures?