Fix flickering screen

app/src/main/java/com/sadellie/unitto/MainActivity.kt

@@ -18,9 +18,14 @@
 
 package com.sadellie.unitto
 
+import android.app.Activity
+import android.content.Context
 import android.os.Bundle
+import android.util.AttributeSet
+import android.view.View
 import androidx.activity.ComponentActivity
 import androidx.activity.compose.setContent
+import androidx.core.view.WindowCompat
 import dagger.hilt.android.AndroidEntryPoint
 
 @AndroidEntryPoint
@@ -33,4 +38,16 @@ internal class MainActivity : ComponentActivity() {
             UnittoApp()
         }
     }
+
+    override fun onCreateView(
+        parent: View?,
+        name: String,
+        context: Context,
+        attrs: AttributeSet
+    ): View? {
+        if (parent != null) {
+            WindowCompat.setDecorFitsSystemWindows((parent.context as Activity).window, false)
+        }
+        return super.onCreateView(parent, name, context, attrs)
+    }
 }

app/src/main/java/com/sadellie/unitto/UnittoApp.kt

@@ -18,7 +18,6 @@
 
 package com.sadellie.unitto
 
-import android.app.Activity
 import androidx.compose.animation.core.tween
 import androidx.compose.material3.DrawerValue
 import androidx.compose.material3.MaterialTheme
@@ -34,8 +33,6 @@ import androidx.compose.runtime.rememberCoroutineScope
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.graphics.Color
 import androidx.compose.ui.graphics.luminance
-import androidx.compose.ui.platform.LocalView
-import androidx.core.view.WindowCompat
 import androidx.hilt.navigation.compose.hiltViewModel
 import androidx.lifecycle.compose.collectAsStateWithLifecycle
 import androidx.navigation.NavDestination.Companion.hierarchy
@@ -44,8 +41,8 @@ import androidx.navigation.compose.currentBackStackEntryAsState
 import androidx.navigation.compose.rememberNavController
 import com.google.accompanist.systemuicontroller.rememberSystemUiController
 import com.sadellie.unitto.core.base.TopLevelDestinations
-import com.sadellie.unitto.core.ui.model.DrawerItems
 import com.sadellie.unitto.core.ui.common.UnittoDrawerSheet
+import com.sadellie.unitto.core.ui.model.DrawerItems
 import com.sadellie.unitto.core.ui.theme.AppTypography
 import com.sadellie.unitto.core.ui.theme.DarkThemeColors
 import com.sadellie.unitto.core.ui.theme.LightThemeColors
@@ -109,7 +106,6 @@ internal fun UnittoApp() {
         typography = AppTypography,
         animationSpec = tween(250)
     ) {
-        val localView = LocalView.current
         val backgroundColor = MaterialTheme.colorScheme.background
         val useDarkIcons by remember(backgroundColor) {
             mutableStateOf(backgroundColor.luminance() > 0.5f)
@@ -148,7 +144,6 @@ internal fun UnittoApp() {
         }
 
         LaunchedEffect(useDarkIcons) {
-            WindowCompat.setDecorFitsSystemWindows((localView.context as Activity).window, false)
             sysUiController.setNavigationBarColor(Color.Transparent, useDarkIcons)
             sysUiController.setStatusBarColor(Color.Transparent, useDarkIcons)
         }

app/src/main/java/com/sadellie/unitto/UnittoNavigation.kt

@@ -18,7 +18,10 @@
 
 package com.sadellie.unitto
 
+import androidx.compose.foundation.background
+import androidx.compose.material3.MaterialTheme
 import androidx.compose.runtime.Composable
+import androidx.compose.ui.Modifier
 import androidx.navigation.NavGraph.Companion.findStartDestination
 import androidx.navigation.NavHostController
 import androidx.navigation.compose.NavHost
@@ -49,7 +52,8 @@ internal fun UnittoNavigation(
 ) {
     NavHost(
         navController = navController,
-        startDestination = startDestination
+        startDestination = startDestination,
+        modifier = Modifier.background(MaterialTheme.colorScheme.background)
     ) {
         fun navigateToSettings() {
             navController.navigateToSettings {