Launch Activity For Result

LaunchActivityForResult.kt

var pages by remember {
    mutableStateOf<List<Uri>>(emptyList())
}

scannerLauncher =
    rememberLauncherForActivityResult(contract = ActivityResultContracts.StartIntentSenderForResult(),
        onResult = { activityResult ->
            val resultCode = activityResult.resultCode
            val result = GmsDocumentScanningResult.fromActivityResultIntent(
                activityResult.data
            )

            when (resultCode) {
                RESULT_OK -> {

                    //get images
                    pages = result?.pages?.map { it.imageUri } ?: emptyList()

                    //getPDF
                    result?.pdf?.let { pdf ->
                        val fileOutputStream = FileOutputStream(
                            File(
                                filesDir,
                                "$documentName.pdf"
                            )
                        )
                        contentResolver.openInputStream(pdf.uri).use {
                            it?.copyTo(fileOutputStream)
                        }
                    }
                }

                RESULT_CANCELED -> {
                    showToast("Scanner Cancelled")
                }

                else -> {
                    showToast("Something went wrong")
                }
            }
        })