change the theme to go fullscreen.

app/src/main/AndroidManifest.xml

@@ -7,17 +7,17 @@
 
     <application
         android:name=".BibLibApplication"
-        android:allowBackup="false"
+        android:allowBackup="true"
         android:icon="@mipmap/ic_launcher"
         android:label="@string/app_name"
         android:roundIcon="@mipmap/ic_launcher_round"
         android:supportsRtl="true"
-        android:theme="@style/Theme.MaterialComponents.DayNight.NoActionBar">
+        android:theme="@style/Theme.BibLib.NoActionBar">
 
         <activity
             android:name=".ui.MainActivity"
             android:exported="true"
-            android:label="@string/app_name">
+            android:theme="@style/Theme.BibLib.Starting">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
                 <category android:name="android.intent.category.LAUNCHER" />

app/src/main/java/com/pixelized/biblib/ui/MainActivity.kt

@@ -3,8 +3,14 @@ package com.pixelized.biblib.ui
 import android.os.Bundle
 import androidx.activity.ComponentActivity
 import androidx.activity.compose.setContent
+import androidx.activity.viewModels
 import androidx.compose.material.MaterialTheme
 import androidx.compose.material.Surface
+import androidx.compose.runtime.getValue
+import androidx.core.splashscreen.SplashScreen.Companion.installSplashScreen
+import androidx.core.view.WindowCompat
+import com.google.accompanist.insets.ProvideWindowInsets
+import com.pixelized.biblib.ui.launch.LauncherViewModel
 import com.pixelized.biblib.ui.navigation.FullScreenNavHost
 import com.pixelized.biblib.ui.navigation.Screen
 import com.pixelized.biblib.ui.theme.BibLibTheme
@@ -14,17 +20,33 @@ import dagger.hilt.android.AndroidEntryPoint
 @AndroidEntryPoint
 class MainActivity : ComponentActivity() {
 
+    private val launcherViewModel: LauncherViewModel by viewModels()
+
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
 
+        // Disable system inset consuming.
+        WindowCompat.setDecorFitsSystemWindows(window, false)
+
+        // splashscreen management
+        installSplashScreen().apply {
+            setKeepOnScreenCondition {
+                launcherViewModel.isLoading.value
+            }
+        }
+
+        // Compose
         setContent {
             BibLibTheme {
-                Surface(
-                    color = MaterialTheme.colors.background,
-                ) {
-                    FullScreenNavHost(
-                        startDestination = Screen.Authentication
-                    )
+                ProvideWindowInsets {
+                    Surface(color = MaterialTheme.colors.background) {
+                        val loading by launcherViewModel.isLoading
+                        if (loading.not()) {
+                            FullScreenNavHost(
+                                startDestination = Screen.Authentication
+                            )
+                        }
+                    }
                 }
             }
         }

app/src/main/java/com/pixelized/biblib/ui/authentication/AuthenticationScreen.kt

@@ -12,7 +12,6 @@ import androidx.compose.foundation.text.KeyboardOptions
 import androidx.compose.foundation.verticalScroll
 import androidx.compose.material.*
 import androidx.compose.material.icons.Icons
-import androidx.compose.material.icons.filled.ArrowBack
 import androidx.compose.material.icons.sharp.Visibility
 import androidx.compose.material.icons.sharp.VisibilityOff
 import androidx.compose.runtime.*
@@ -30,9 +29,13 @@ import androidx.compose.ui.text.withStyle
 import androidx.compose.ui.tooling.preview.Preview
 import androidx.hilt.navigation.compose.hiltViewModel
 import androidx.navigation.NavHostController
+import com.google.accompanist.insets.systemBarsPadding
 import com.pixelized.biblib.R
 import com.pixelized.biblib.network.client.IBibLibClient
-import com.pixelized.biblib.ui.composable.*
+import com.pixelized.biblib.ui.composable.AnimatedDelayer
+import com.pixelized.biblib.ui.composable.AnimatedOffset
+import com.pixelized.biblib.ui.composable.StateUio
+import com.pixelized.biblib.ui.composable.StateUioHandler
 import com.pixelized.biblib.ui.navigation.LocalFullScreenNavHostController
 import com.pixelized.biblib.ui.navigation.Screen
 import com.pixelized.biblib.ui.theme.BibLibTheme
@@ -99,6 +102,7 @@ private fun AuthenticationScreenContent(
             modifier = Modifier
                 .fillMaxSize()
                 .verticalScroll(scrollState)
+                .systemBarsPadding()
         ) {
             Spacer(modifier = Modifier.weight(1f))
 
@@ -358,6 +362,8 @@ fun googleStringResource(): AnnotatedString = buildAnnotatedString {
     }
 }
 
+// endregion
+
 @Composable
 @Preview(showBackground = true, uiMode = Configuration.UI_MODE_NIGHT_NO)
 @Preview(showBackground = true, uiMode = Configuration.UI_MODE_NIGHT_YES)

app/src/main/java/com/pixelized/biblib/ui/composable/AnimatedDelayer.kt

@@ -11,5 +11,5 @@ fun AnimatedDelayer(
 }
 
 class AnimatedDelayerScope(
-    var delay : Delay = Delay()
+    var delay: Delay = Delay()
 )

app/src/main/java/com/pixelized/biblib/ui/composable/SystemThemeColor.kt

@@ -0,0 +1,24 @@
+package com.pixelized.biblib.ui.composable
+
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.SideEffect
+import androidx.compose.ui.graphics.Color
+import com.google.accompanist.systemuicontroller.SystemUiController
+
+@Composable
+fun SystemThemeColor(
+    systemUiController: SystemUiController,
+    color: Color = Color.Transparent,
+    statusDarkIcons: Boolean,
+    navigationDarkIcons: Boolean,
+) = SideEffect {
+    systemUiController.setStatusBarColor(
+        color = color,
+        darkIcons = statusDarkIcons,
+    )
+    systemUiController.setNavigationBarColor(
+        color = color,
+        darkIcons = navigationDarkIcons,
+        navigationBarContrastEnforced = false,
+    )
+}

app/src/main/java/com/pixelized/biblib/ui/launch/LauncherViewModel.kt

@@ -0,0 +1,25 @@
+package com.pixelized.biblib.ui.launch
+
+import androidx.compose.runtime.State
+import androidx.compose.runtime.mutableStateOf
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.viewModelScope
+import dagger.hilt.android.lifecycle.HiltViewModel
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.delay
+import kotlinx.coroutines.launch
+import javax.inject.Inject
+
+@HiltViewModel
+class LauncherViewModel @Inject constructor() : ViewModel() {
+
+    private val _isLoading = mutableStateOf(true)
+    val isLoading: State<Boolean> get() = _isLoading
+
+    init {
+        viewModelScope.launch(Dispatchers.IO) {
+            delay(3000)
+            _isLoading.value = false
+        }
+    }
+}

app/src/main/java/com/pixelized/biblib/ui/navigation/FullScreenNavHost.kt

@@ -1,5 +1,6 @@
 package com.pixelized.biblib.ui.navigation
 
+import androidx.compose.foundation.isSystemInDarkTheme
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.CompositionLocalProvider
 import androidx.compose.runtime.compositionLocalOf
@@ -7,7 +8,10 @@ import androidx.navigation.NavHostController
 import androidx.navigation.compose.NavHost
 import androidx.navigation.compose.composable
 import androidx.navigation.compose.rememberNavController
+import com.google.accompanist.systemuicontroller.SystemUiController
+import com.google.accompanist.systemuicontroller.rememberSystemUiController
 import com.pixelized.biblib.ui.authentication.AuthenticationScreen
+import com.pixelized.biblib.ui.composable.SystemThemeColor
 
 val LocalFullScreenNavHostController = compositionLocalOf<NavHostController> {
     error("LocalFullScreenNavHostController is not ready yet.")
@@ -18,12 +22,19 @@ fun FullScreenNavHost(
     navHostController: NavHostController = rememberNavController(),
     startDestination: Screen = Screen.Authentication
 ) {
+    val systemUiController: SystemUiController = rememberSystemUiController()
+
     CompositionLocalProvider(LocalFullScreenNavHostController provides navHostController) {
         NavHost(
             navController = navHostController,
             startDestination = startDestination.route,
         ) {
             composable(Screen.Authentication.route) {
+                SystemThemeColor(
+                    systemUiController = systemUiController,
+                    statusDarkIcons = isSystemInDarkTheme().not(),
+                    navigationDarkIcons = isSystemInDarkTheme().not(),
+                )
                 AuthenticationScreen()
             }
             composable(Screen.Home.route) {

app/src/main/res/values/themes.xml

@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+
+    <style name="Theme.BibLib.Starting" parent="Theme.SplashScreen">
+        <item name="postSplashScreenTheme">@style/Theme.BibLib.NoActionBar</item>
+    </style>
+
+    <style name="Theme.BibLib.NoActionBar" parent="Theme.MaterialComponents.DayNight.NoActionBar">
+        <item name="windowActionBar">false</item>
+        <item name="windowNoTitle">true</item>
+    </style>
+</resources>