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November 26, 2024 19:46
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Jetpack compose condition navigation
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package com.example.myapplication | |
import android.os.Bundle | |
import androidx.activity.ComponentActivity | |
import androidx.activity.compose.setContent | |
import androidx.activity.enableEdgeToEdge | |
import androidx.compose.foundation.layout.Column | |
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.ui.Modifier | |
import androidx.lifecycle.compose.collectAsStateWithLifecycle | |
import androidx.navigation.compose.NavHost | |
import androidx.navigation.compose.composable | |
import androidx.navigation.compose.rememberNavController | |
import com.example.myapplication.ui.theme.MyApplicationTheme | |
import kotlinx.coroutines.flow.MutableStateFlow | |
import kotlinx.coroutines.flow.asStateFlow | |
class MainActivity : ComponentActivity() { | |
override fun onCreate(savedInstanceState: Bundle?) { | |
super.onCreate(savedInstanceState) | |
enableEdgeToEdge() | |
setContent { | |
val isAuthStatFlow = MutableStateFlow(false) | |
val isAuth = isAuthStatFlow.asStateFlow().collectAsStateWithLifecycle() | |
MyApplicationTheme { | |
Scaffold(modifier = Modifier.fillMaxSize()) { innerPadding -> | |
if (isAuth.value) { | |
val navController = rememberNavController() | |
NavHost(navController = navController, startDestination = "main") { | |
composable("main", content = { | |
Column { | |
Button(onClick = { isAuthStatFlow.value = false }) { | |
Text("logout") | |
} | |
Button(onClick = { navController.navigate("profile") }) { | |
Text("profile") | |
} | |
} | |
}) | |
composable("profile", content = { | |
Button(onClick = { navController.popBackStack() }) { | |
Text("back from profile") | |
} | |
}) | |
} | |
} else { | |
Column(modifier = Modifier | |
.fillMaxSize() | |
.padding(innerPadding)) { | |
Button(onClick = { isAuthStatFlow.value = true }) { | |
Text("login") | |
} | |
} | |
} | |
} | |
} | |
} | |
} | |
} |
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