registerForActivityResult doesn't work properly in android

Question

I have fragment which uses camera activity. It waits data from this activity which is sent via intent. At the beginning I registered listener in the fragment:

private var resultLauncher =
        registerForActivityResult(ActivityResultContracts.StartActivityForResult()) { result ->
if (result.resultCode == Activity.RESULT_OK) {
val data: Intent? = result.data

data?.let {
   val file = File(data.extras?.getString("file_path")!!)
   val uri = file.toUri()
}

}


}

and then after button click I launch my target activity:

val intent = Intent(context, CamActivity::class.java)
intent.putExtra("default_cam", true)
resultLauncher.launch(intent)

then in target activity after photo making I send data in such way:

val data = Intent()
data.putExtra("file_path", file.absolutePath)
setResult(RESULT_OK, data)
finish()

The problem is connected with processing activity results. When I open the app for the first time I can process data from the intent and enter to the data?.let{... block. But when I worked in some other app parts and then open this photo fragment I don't enter to data?.let{... block. I checked on the camera activity that photo data was sent, but my host fragment can't receive it without re-opening the app. I tried to unregister this receiver in such way:

override fun onDestroyView() {
super.onDestroyView()
resultLauncher.unregister()
}

but it didn't help me.

UPDATE

My scenario:

1. open my app with fragments A,B(here we can open cam activity) and activity C (cam activity)
2. open A -> move to B -> and press btn for camera activity (C) open
3. make some photo
4. return data from C to fragment B
5. process it in activity result contract
6. move to A (not camera fragment)
7. return to B -> press btn and open camera activity (C)
8. make photo and return data to camera fragment A
9. activity contract can't process any received data

Answer 1

Try to use the provided intent and set Activity.RESULT_OK as result when sending data from CamActivity:

intent.putExtra("file_path", file.absolutePath)
setResult(Activity.RESULT_OK, intent)
finish()

Answer 2

Make sure you do the assignment inside onAttach or onCreate, i.e, before the activity is displayed. It should work.

fun openSomeActivityForResult() {
        val intent = Intent(context, CamActivity::class.java)
        intent.putExtra("default_cam", true)
        resultLauncher.launch(intent)
    }
    
    var resultLauncher = registerForActivityResult(StartActivityForResult()) { result ->
        if (result.resultCode == Activity.RESULT_OK) {
            // There are no request codes
            val data: Intent? = result.data
            doSomeThing()
        }
    }