Unresolved reference: HappyBirthdayTheme

Unresolved reference: HappyBirthdayTheme

package com.example.happybirthday



import android.os.Bundle

import androidx.activity.ComponentActivity

import androidx.activity.compose.setContent

import androidx.compose.foundation.layout.Arrangement

import androidx.compose.foundation.layout.Column

import androidx.compose.foundation.layout.fillMaxSize

import androidx.compose.foundation.layout.padding

import androidx.compose.material3.MaterialTheme

import androidx.compose.material3.Surface

import androidx.compose.material3.Text

import androidx.compose.runtime.Composable

import androidx.compose.ui.Alignment

import androidx.compose.ui.Modifier

import androidx.compose.ui.text.style.TextAlign

import androidx.compose.ui.tooling.preview.Preview

import androidx.compose.ui.unit.dp

import androidx.compose.ui.unit.sp

import com.example.happybirthday.ui.theme.HappyBirthdayTheme as HappybirthdayUiThemeHappyBirthdayTheme

import com.example.happybirthday.ui.theme.HappyBirthdayTheme as ThemeHappyBirthdayTheme





class MainActivity : ComponentActivity() {

    override fun onCreate(savedInstanceState: Bundle?) {

        super.onCreate(savedInstanceState)

        setContent {

            HappybirthdayUiThemeHappyBirthdayTheme {

                // A surface container using the 'background' color from the theme

                Surface(

                    modifier = Modifier.fillMaxSize(),

                    color = MaterialTheme.colorScheme.background

                ) {

                    GreetingText(

                        message = "Happy Birthday Sam!",

                        from = "From Emma",

                        modifier = Modifier.padding(8.dp)

                    )

                }

            }

        }

    }

}



@Composable

fun GreetingText(message: String, from: String, modifier: Modifier = Modifier) {

    Column(

        verticalArrangement = Arrangement.Center,

        modifier = modifier

    ) {

        Text(

            text = message,

            fontSize = 100.sp,

            lineHeight = 116.sp,

            textAlign = TextAlign.Center

        )

        Text(

            text = from,

            fontSize = 36.sp,

            modifier = Modifier

                .padding(16.dp)

                .align(alignment = Alignment.End)

        )

    }

}



@Preview(showBackground = true)

@Composable

fun BirthdayCardPreview() {

    HappybirthdayUiThemeHappyBirthdayTheme {

        GreetingText(message = "Happy Birthday Sam!", from = "From Emma")

    }

}