MainActivity.kt

import android.os.Bundle
import androidx.activity.ComponentActivity
import androidx.activity.compose.setContent
import androidx.compose.foundation.background
import androidx.compose.foundation.border
import androidx.compose.foundation.layout.Arrangement
import androidx.compose.foundation.layout.Box
import androidx.compose.foundation.layout.Column
import androidx.compose.foundation.layout.fillMaxSize
import androidx.compose.foundation.layout.fillMaxWidth
import androidx.compose.foundation.layout.height
import androidx.compose.foundation.layout.padding
import androidx.compose.foundation.layout.size
import androidx.compose.material3.Button
import androidx.compose.material3.ButtonDefaults
import androidx.compose.material3.MaterialTheme
import androidx.compose.material3.Surface
import androidx.compose.material3.Text
import androidx.compose.runtime.Composable
//import androidx.compose.runtime.getValue
//import androidx.compose.runtime.mutableStateOf
//import androidx.compose.runtime.remember
//import androidx.compose.runtime.setValue
import androidx.compose.runtime.*
import androidx.compose.ui.Alignment
import androidx.compose.ui.Modifier
import androidx.compose.ui.graphics.Color
import androidx.compose.ui.text.font.FontWeight
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.adefault.ui.theme.DefaultTheme

class MainActivity : ComponentActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContent {
            DefaultTheme {
                MyDiceApp()
            }
        }
    }
}

@Composable
fun MyDiceApp(){

    var diceNumber by remember {
        mutableStateOf(1)
    }

    Column(
        modifier = Modifier
            .fillMaxSize()
            .background(Color.LightGray),
        horizontalAlignment = Alignment.CenterHorizontally,
        verticalArrangement = Arrangement.Center
    ) {

        Box(
            modifier = Modifier
                .size(300.dp)
                .border(3.dp, Color.Black)
                .background(Color.White)
                .padding(20.dp)
        ) {

        }

        Button(
            onClick = {  },
            modifier = Modifier
                .fillMaxWidth()
                .padding(50.dp)
                .height(50.dp),
            colors = ButtonDefaults.buttonColors(
                containerColor = Color.White
            )
        ) {
            Text(
                text = "주사위 굴리기",
                color = Color.Black,
                fontWeight = FontWeight.Bold,
                textAlign = TextAlign.Center,
                fontSize = 20.sp
            )
        }

        Text(
            text = diceNumber.toString(),
            fontWeight = FontWeight.Bold,
            fontSize = 30.sp
        )

    }

}

@Preview(showBackground = true)
@Composable
fun GreetingPreview() {
    DefaultTheme {
        MyDiceApp()
    }
}