SignUpScreen.kt

@Composable
fun SignUpScreen(
    modifier: Modifier = Modifier,
    navController: NavController,
    viewModel: SignUpViewModel = hiltViewModel()
) {
    val snackBarHostState = remember { SnackbarHostState() }
    val coroutineScope = rememberCoroutineScope()
    Scaffold(
        snackbarHost = { androidx.compose.material.SnackbarHost(snackBarHostState) },
        topBar = {
            TopAppBar(
                navigationIcon = {
                    IconButton(onClick = {
                        navController.navigateUp()
                    }) {
                        Icon(
                            imageVector = Icons.Filled.ArrowBack,
                            contentDescription = null,
                            tint = MaterialTheme.colorScheme.onPrimary
                        )
                    }
                },
                backgroundColor = MaterialTheme.colorScheme.primary,
                title = {
                    Text(
                        text = "Sign Up",
                        color = MaterialTheme.colorScheme.onPrimary,
                    )
                },
            )
        }
    ) { paddingValues ->
        Column(
            modifier = modifier
                .padding(paddingValues)
                .padding(20.dp)
        ) {
            val email = viewModel.email.collectAsState(initial = "")
            val password = viewModel.password.collectAsState()
            OutlinedTextField(
                label = {
                    Text(
                        text = "Email",
                        color = MaterialTheme.colorScheme.primary,
                        style = MaterialTheme.typography.titleMedium
                    )
                },
                maxLines = 1,
                shape = RoundedCornerShape(32),
                modifier = modifier.fillMaxWidth(),
                value = email.value,
                onValueChange = {
                    viewModel.onEmailChange(it)
                },
            )
            OutlinedTextField(
                label = {
                    Text(
                        text = "Password",
                        color = MaterialTheme.colorScheme.primary,
                        style = MaterialTheme.typography.titleMedium
                    )
                },
                maxLines = 1,
                shape = RoundedCornerShape(32),
                modifier = modifier
                    .fillMaxWidth()
                    .padding(top = 12.dp),
                value = password.value,
                onValueChange = {
                    viewModel.onPasswordChange(it)
                },
            )
            val localSoftwareKeyboardController = LocalSoftwareKeyboardController.current
            Button(modifier = modifier
                .fillMaxWidth()
                .padding(top = 12.dp),
                onClick = {
                    localSoftwareKeyboardController?.hide()
                    viewModel.onSignUp()
                    coroutineScope.launch {
                        snackBarHostState.showSnackbar(
                            message = "Create account successfully. Sign in now!",
                            duration = SnackbarDuration.Long
                        )
                    }
                }) {
                Text("Sign up")
            }
        }
    }
}