1.引入依赖

//jetpack compose导航

implementation("androidx.navigation:navigation-compose:2.5.3")

2.代码

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.material3.Button
import androidx.compose.material3.Text
import androidx.compose.runtime.Composable
import androidx.compose.ui.Alignment
import androidx.compose.ui.Modifier
import androidx.compose.ui.unit.sp
import androidx.navigation.NavController
import androidx.navigation.NavHostController
import androidx.navigation.compose.NavHost
import androidx.navigation.compose.composable
import androidx.navigation.compose.rememberNavController

class MainActivity : ComponentActivity() {
    private lateinit var mNavController: NavController

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContent {
            //创建导航控制器
            mNavController = rememberNavController()
            //创建NavHost导航组建者，传入了mNavController 导航控制器 与 首个显示的页面 startDestination = APage
            NavHost(navController = mNavController as NavHostController, startDestination = "APage") {
                //这里添加了页面A，APage为路由地址
                composable(route = "APage") { APage() }
                composable(route = "BPage") { BPage() }
            }
        }
    }


    /**
     * 页面A
     */
    @Composable
    fun APage() {
        Column(
            Modifier.fillMaxSize(),
            horizontalAlignment = Alignment.CenterHorizontally,
            verticalArrangement = Arrangement.Center
        ) {
            Button(onClick = { mNavController.navigate("BPage") }) {
                Text(text = "页面A: 点击跳转页面B", fontSize = 30.sp)
            }
        }
    }

    /**
     * 页面B
     */
    @Composable
    fun BPage() {
        Column(
            Modifier.fillMaxSize(),
            horizontalAlignment = Alignment.CenterHorizontally,
            verticalArrangement = Arrangement.Center
        ) {
            Button(onClick = { mNavController.navigateUp() }) {
                Text(text = "页面B: 点击返回页面A", fontSize = 30.sp)
            }
        }
    }

}