navigation(Empty activity)

import android.os.Bundle
import androidx.activity.ComponentActivity
import androidx.activity.compose.setContent
import androidx.activity.enableEdgeToEdge
import androidx.compose.foundation.layout.Arrangement
import androidx.compose.foundation.layout.Box
import androidx.compose.foundation.layout.Column
import androidx.compose.foundation.layout.Row
import androidx.compose.foundation.layout.fillMaxSize
import androidx.compose.foundation.layout.padding
import androidx.compose.material3.Button
import androidx.compose.material3.Scaffold
import androidx.compose.material3.Text
import androidx.compose.runtime.Composable
import androidx.compose.ui.Modifier
import androidx.compose.ui.tooling.preview.Preview
import androidx.navigation.NavController
import androidx.navigation.compose.NavHost
import androidx.navigation.compose.composable
import androidx.navigation.compose.rememberNavController
import com.example.prog2.ui.theme.Prog2Theme

class MainActivity : ComponentActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        enableEdgeToEdge()
        setContent {
            val nav_Controller = rememberNavController()
            NavHost(navController = nav_Controller, startDestination = "fragment1")
          			{
                composable("fragment1") 
                      {
                    Fragment1(nav_Controller)
               			 }
                composable("fragment2") {
                    Fragment2(nav_Controller)
                }
            }
        }
    }
}


@Composable
fun Fragment1(navController: NavController){
    Column {
        Button(onClick={ navController.navigate("fragment2")}) {
            Text(text = "Navigate to fragment2 ")
        }
    }
}


@Composable
fun Fragment2(navController: NavController) {
    Row(horizontalArrangement = Arrangement.SpaceEvenly){
        
        Button(onClick = { navController.navigateUp() }) {
            Text(text = "Back to Fragment 1")
        }
    }
}
dependencies {
    implementation "androidx.compose.ui:ui:1.3.0"
    implementation "androidx.compose.material3:material3:1.0.0"
    implementation "androidx.navigation:navigation-compose:2.5.3"
    // Other dependencies...
}