Fragment Demo MAD Lab

package com.example.fragment

import android.os.Bundle
import androidx.activity.ComponentActivity
import androidx.activity.compose.setContent
import androidx.activity.enableEdgeToEdge
import androidx.compose.foundation.layout.Box
import androidx.compose.foundation.layout.Column
import androidx.compose.foundation.layout.Spacer
import androidx.compose.foundation.layout.fillMaxSize
import androidx.compose.foundation.layout.height
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.Alignment
import androidx.compose.ui.Modifier
import androidx.compose.ui.graphics.Color
import androidx.compose.ui.tooling.preview.Preview
import androidx.compose.ui.unit.dp
import androidx.compose.ui.unit.sp
import androidx.navigation.NavController
import androidx.navigation.compose.NavHost
import androidx.navigation.compose.composable
import androidx.navigation.compose.rememberNavController
import com.example.fragment.ui.theme.FragmentTheme

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(modifier = Modifier.fillMaxSize()) {
        Spacer(modifier = Modifier.height(120.dp))
        Text(text = "This is Fragment 1", color = Color.Magenta, fontSize = 30.sp)
    }
    Box(modifier = Modifier.fillMaxSize(),
    contentAlignment = Alignment.Center) {
        Button(onClick = {navController.navigate("fragment2")}) {
            Text(text = "Go to Fragment 2", fontSize = 30.sp)
        }
    }
}

@Composable
fun Fragment2(navController: NavController){
    Column(modifier = Modifier.fillMaxSize()) {
        Spacer(modifier = Modifier.height(120.dp))
        Text(text = "This is Fragment 2", color = Color.Magenta, fontSize = 30.sp)
    }
    Box(modifier = Modifier.fillMaxSize(),
        contentAlignment = Alignment.Center) {
        Button(onClick = {navController.navigateUp()}) {
            Text(text = "Go Back to Fragment 1", fontSize = 30.sp)
        }
    }
}