I have a `OutlinedTextField` and ```var email by rememberSaveable { mutableStateOf("") }``` inside s...

# compose

[K Merle]

I have a OutlinedTextField and

var email by rememberSaveable { mutableStateOf("") }

inside single compose function. Upon rotating screen, email state value resets to "" . Shouldn't rememberSaveable actually keep value of an email and not reset it?

[Colton Idle]

Hm. It should indeed. Do you have any effects defined or anything?

[Colton Idle]

I just tried this and it worked, so it sounds like maybe something is wrong with your code somewhere. Hard to tell without seeing it.

class MainActivity : ComponentActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContent {
            AppTheme {
                Surface(modifier = Modifier.fillMaxSize()) {
                    var email by rememberSaveable { mutableStateOf("") }
                    OutlinedTextField(value = email, onValueChange = { email = it })
                }
            }
        }
    }
}

[K Merle]

Hard nested rememberSaveable should still work, right?

[K Merle]

It might be due to nested navigation?

private fun NavGraphBuilder.addAuthenticationScreenModule() {
    navigation(
        route = AuthenticationNavigation.route,
        startDestination = AuthenticationNavigation.SignInNavigation.route
    ) {
        addSignInScreen()
    }
}

private fun NavGraphBuilder.addSignInScreen() {
    composable(
        route = AuthenticationNavigation.SignInNavigation.route,
    ) {
        SignInScreen()
    }
}

I just tested and it works all until inside SignInScreen composable.

[Colton Idle]

Maybe related to this that was asked just yesterday?

https://kotlinlang.slack.com/archives/CJLTWPH7S/p1627788714178500

[K Merle]

Thanks, I'll look into it.

[K Merle]

NavHost definately for some reason breaks it, not sure if it's my fault, but this does not save `rememberSaveable`:

class MainActivity : ComponentActivity() {

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContent {
            OperationCenterTheme {
                NavHost(navController = rememberNavController(), startDestination = SplashNavigation.route) {
                    composable(route = SplashNavigation.route) {
                        TestComposable()
                    }
                }
            }
        }
    }
}

and this works

class MainActivity : ComponentActivity() {

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContent {
            OperationCenterTheme {
                TestComposable()
            }
        }
    }
}

[K Merle]

Ok, found it, rememberSaveable got broken with androidx.navigation:navigation-compose:2.4.0-alpha05 , works in 2.4.0-alpha04

[Colton Idle]

Try alpha06 released today?

[K Merle]

Thanks mate

[Stepan Furman]

There's the bug in alpha06 too 😞

[Colton Idle]

Fixed in alpha07. Try the snapshot.