Stub out the welcome screen

mobile/app/build.gradle.kts

@@ -2,16 +2,17 @@ plugins {
     alias(libs.plugins.android.application)
     alias(libs.plugins.kotlin.android)
     alias(libs.plugins.kotlin.compose)
+    alias(libs.plugins.jetbrains.kotlin.serialization)
 }
 
 android {
     namespace = "ing.bikeshedengineer.aisle17"
-    compileSdk = 35
+    compileSdk = 36
 
     defaultConfig {
         applicationId = "ing.bikeshedengineer.aisle17"
         minSdk = 34
-        targetSdk = 35
+        targetSdk = 36
         versionCode = 1
         versionName = "1.0"
 
@@ -40,7 +41,12 @@ android {
 }
 
 dependencies {
-
+    implementation(libs.androidx.navigation3.runtime)
+    implementation(libs.androidx.navigation3.ui)
+    implementation(libs.androidx.lifecycle.viewmodel.navigation3)
+    implementation(libs.androidx.material3.navigation3)
+    implementation(libs.kotlinx.serialization.core)
+    implementation(libs.kotlinx.serialization.json)
     implementation(libs.androidx.core.ktx)
     implementation(libs.androidx.appcompat)
     implementation(libs.material)

mobile/app/src/main/AndroidManifest.xml

@@ -15,7 +15,7 @@
         <activity
             android:name=".MainActivity"
             android:exported="true"
-            android:label="@string/title_activity_main"
+            android:colorMode="wideColorGamut"
             android:theme="@style/Theme.Aisle17">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />

mobile/app/src/main/java/ing/bikeshedengineer/aisle17/MainActivity.kt

@@ -9,8 +9,12 @@ import androidx.compose.foundation.layout.padding
 import androidx.compose.material3.Scaffold
 import androidx.compose.material3.Text
 import androidx.compose.runtime.Composable
+import androidx.compose.runtime.mutableStateListOf
+import androidx.compose.runtime.remember
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.tooling.preview.Preview
+import androidx.navigation3.runtime.rememberNavBackStack
+import androidx.navigation3.ui.NavDisplay
 import ing.bikeshedengineer.aisle17.theme.Aisle17Theme
 
 class MainActivity : ComponentActivity() {
@@ -18,30 +22,15 @@ class MainActivity : ComponentActivity() {
         super.onCreate(savedInstanceState)
         enableEdgeToEdge()
         setContent {
+            val backStack = rememberNavBackStack(Destination.Welcome)
+
             Aisle17Theme {
-                Scaffold(modifier = Modifier.fillMaxSize()) { innerPadding ->
+                NavDisplay(
-                    Greeting(
+                    backStack = backStack,
-                        name = "Android",
+                    onBack = { backStack.removeLastOrNull() },
-                        modifier = Modifier.padding(innerPadding)
+                    entryProvider = ::entryProvider
-                    )
+                )
-                }
             }
         }
     }
-}
-
-@Composable
-fun Greeting(name: String, modifier: Modifier = Modifier) {
-    Text(
-        text = "Hello $name!",
-        modifier = modifier
-    )
-}
-
-@Preview(showBackground = true)
-@Composable
-fun GreetingPreview() {
-    Aisle17Theme {
-        Greeting("Android")
-    }
 }

mobile/app/src/main/java/ing/bikeshedengineer/aisle17/Navigation.kt

@@ -0,0 +1,20 @@
+package ing.bikeshedengineer.aisle17
+
+import androidx.navigation3.runtime.NavEntry
+import androidx.navigation3.runtime.NavKey
+import ing.bikeshedengineer.aisle17.welcome.WelcomeScreen
+import kotlinx.serialization.Serializable
+
+@Serializable
+sealed class Destination : NavKey {
+    @Serializable
+    data object Welcome : Destination()
+}
+
+fun entryProvider(destination: NavKey): NavEntry<NavKey> {
+    return when (destination as Destination) {
+        is Destination.Welcome -> NavEntry(destination) {
+            WelcomeScreen()
+        }
+    }
+}

mobile/app/src/main/java/ing/bikeshedengineer/aisle17/theme/Color.kt

@@ -1,6 +1,49 @@
 package ing.bikeshedengineer.aisle17.theme
 
 import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.graphics.colorspace.ColorSpaces
+
+val RoyalBlue = Color(
+    red = 0.17f,
+    green = 0.38f,
+    blue = 0.74f,
+    colorSpace = ColorSpaces.DisplayP3
+)
+
+val CornFlowerBlue = Color(
+    red = 0.45f,
+    green = 0.54f,
+    blue = 0.82f,
+    colorSpace = ColorSpaces.DisplayP3
+)
+
+val Chocolate = Color(
+    red = 0.72f,
+    green = 0.43f,
+    blue = 0.16f,
+    colorSpace = ColorSpaces.DisplayP3
+)
+
+val MidnightBlue = Color(
+    red = 0.1f,
+    green = 0.14f,
+    blue = 0.24f,
+    colorSpace = ColorSpaces.DisplayP3
+)
+
+val DarkSlateBlue = Color(
+    red = 0.27f,
+    green = 0.33f,
+    blue = 0.52f,
+    colorSpace = ColorSpaces.DisplayP3
+)
+
+val SaddleBrown = Color(
+    red = 0.5f,
+    green = 0.36f,
+    blue = 0.16f,
+    colorSpace = ColorSpaces.DisplayP3
+)
 
 val Purple80 = Color(0xFFD0BCFF)
 val PurpleGrey80 = Color(0xFFCCC2DC)

mobile/app/src/main/java/ing/bikeshedengineer/aisle17/theme/Theme.kt

@@ -9,16 +9,10 @@ import androidx.compose.material3.lightColorScheme
 import androidx.compose.runtime.Composable
 import androidx.compose.ui.platform.LocalContext
 
-private val DarkColorScheme = darkColorScheme(
-    primary = Purple80,
-    secondary = PurpleGrey80,
-    tertiary = Pink80
-)
-
 private val LightColorScheme = lightColorScheme(
-    primary = Purple40,
+    primary = RoyalBlue,
-    secondary = PurpleGrey40,
+    secondary = CornFlowerBlue,
-    tertiary = Pink40
+    tertiary = Chocolate
 
     /* Other default colors to override
     background = Color(0xFFFFFBFE),
@@ -31,6 +25,12 @@ private val LightColorScheme = lightColorScheme(
     */
 )
 
+private val DarkColorScheme = darkColorScheme(
+    primary = MidnightBlue,
+    secondary = DarkSlateBlue,
+    tertiary = SaddleBrown
+)
+
 @Composable
 fun Aisle17Theme(
     darkTheme: Boolean = isSystemInDarkTheme(),

mobile/app/src/main/java/ing/bikeshedengineer/aisle17/welcome/WelcomeScreen.kt

@@ -0,0 +1,50 @@
+package ing.bikeshedengineer.aisle17.welcome
+
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.padding
+import androidx.compose.material3.ExperimentalMaterial3Api
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Scaffold
+import androidx.compose.material3.Text
+import androidx.compose.material3.TopAppBar
+import androidx.compose.material3.TopAppBarDefaults
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.text.style.TextOverflow
+import androidx.compose.ui.tooling.preview.Preview
+import ing.bikeshedengineer.aisle17.R
+import ing.bikeshedengineer.aisle17.theme.Aisle17Theme
+
+@OptIn(ExperimentalMaterial3Api::class)
+@Composable
+fun WelcomeScreen() {
+    Scaffold(
+        topBar = {
+            TopAppBar(
+                title = { Text(stringResource(R.string.testing), maxLines = 1, overflow = TextOverflow.Ellipsis) },
+                colors = TopAppBarDefaults.topAppBarColors().copy(
+                    containerColor = MaterialTheme.colorScheme.primary
+                )
+            )
+        },
+        modifier = Modifier.fillMaxSize()
+    ) { innerPadding ->
+        Box(
+            contentAlignment = Alignment.Center,
+            modifier = Modifier.padding(innerPadding)
+        ) {
+            Text("Hello, world!")
+        }
+    }
+}
+
+@Preview(showBackground = true)
+@Composable
+fun WelcomeScreenPreview() {
+    Aisle17Theme {
+        WelcomeScreen()
+    }
+}

mobile/app/src/main/res/values/strings.xml

@@ -1,4 +1,6 @@
 <resources>
     <string name="app_name">Aisle17</string>
-    <string name="title_activity_main">MainActivity</string>
+
+    <!-- Welcome Screen -->
+    <string name="testing">Testing</string>
 </resources>

mobile/gradle/libs.versions.toml

@@ -1,36 +1,50 @@
 [versions]
+activityCompose = "1.10.1"
 agp = "8.10.0"
-kotlin = "2.0.21"
+appcompat = "1.7.0"
+composeBom = "2025.05.01"
 coreKtx = "1.16.0"
+espressoCore = "3.6.1"
 junit = "4.13.2"
 junitVersion = "1.2.1"
-espressoCore = "3.6.1"
+kotlin = "2.0.21"
-appcompat = "1.7.0"
+kotlinSerialization = "2.1.21"
+kotlinxSerializationCore = "1.8.1"
+lifecycleRuntimeKtx = "2.9.0"
 material = "1.12.0"
-lifecycleRuntimeKtx = "2.6.1"
+material3 = "1.4.0-alpha15"
-activityCompose = "1.8.0"
+nav3Core = "1.0.0-alpha02"
-composeBom = "2024.09.00"
+nav3Lifecycle = "1.0.0-alpha01"
+nav3Material = "1.0.0-SNAPSHOT"
 
 [libraries]
-androidx-core-ktx = { group = "androidx.core", name = "core-ktx", version.ref = "coreKtx" }
-junit = { group = "junit", name = "junit", version.ref = "junit" }
-androidx-junit = { group = "androidx.test.ext", name = "junit", version.ref = "junitVersion" }
-androidx-espresso-core = { group = "androidx.test.espresso", name = "espresso-core", version.ref = "espressoCore" }
-androidx-appcompat = { group = "androidx.appcompat", name = "appcompat", version.ref = "appcompat" }
-material = { group = "com.google.android.material", name = "material", version.ref = "material" }
-androidx-lifecycle-runtime-ktx = { group = "androidx.lifecycle", name = "lifecycle-runtime-ktx", version.ref = "lifecycleRuntimeKtx" }
 androidx-activity-compose = { group = "androidx.activity", name = "activity-compose", version.ref = "activityCompose" }
+androidx-appcompat = { group = "androidx.appcompat", name = "appcompat", version.ref = "appcompat" }
 androidx-compose-bom = { group = "androidx.compose", name = "compose-bom", version.ref = "composeBom" }
+androidx-core-ktx = { group = "androidx.core", name = "core-ktx", version.ref = "coreKtx" }
+androidx-espresso-core = { group = "androidx.test.espresso", name = "espresso-core", version.ref = "espressoCore" }
+androidx-junit = { group = "androidx.test.ext", name = "junit", version.ref = "junitVersion" }
+androidx-lifecycle-runtime-ktx = { group = "androidx.lifecycle", name = "lifecycle-runtime-ktx", version.ref = "lifecycleRuntimeKtx" }
+androidx-lifecycle-viewmodel-navigation3 = { module = "androidx.lifecycle:lifecycle-viewmodel-navigation3", version.ref = "nav3Lifecycle" }
+androidx-material3 = { group = "androidx.compose.material3", name = "material3", version.ref = "material3" }
+androidx-material3-navigation3 = { group = "androidx.compose.material3.adaptive", name = "adaptive-navigation3", version.ref = "nav3Material" }
+androidx-navigation3-runtime = { module = "androidx.navigation3:navigation3-runtime", version.ref = "nav3Core" }
+androidx-navigation3-ui = { module = "androidx.navigation3:navigation3-ui", version.ref = "nav3Core" }
 androidx-ui = { group = "androidx.compose.ui", name = "ui" }
 androidx-ui-graphics = { group = "androidx.compose.ui", name = "ui-graphics" }
+androidx-ui-test-junit4 = { group = "androidx.compose.ui", name = "ui-test-junit4" }
+androidx-ui-test-manifest = { group = "androidx.compose.ui", name = "ui-test-manifest" }
 androidx-ui-tooling = { group = "androidx.compose.ui", name = "ui-tooling" }
 androidx-ui-tooling-preview = { group = "androidx.compose.ui", name = "ui-tooling-preview" }
-androidx-ui-test-manifest = { group = "androidx.compose.ui", name = "ui-test-manifest" }
+junit = { group = "junit", name = "junit", version.ref = "junit" }
-androidx-ui-test-junit4 = { group = "androidx.compose.ui", name = "ui-test-junit4" }
+kotlinx-serialization-core = { module = "org.jetbrains.kotlinx:kotlinx-serialization-core", version.ref = "kotlinxSerializationCore" }
-androidx-material3 = { group = "androidx.compose.material3", name = "material3" }
+kotlinx-serialization-json = { module = "org.jetbrains.kotlinx:kotlinx-serialization-json", version.ref = "kotlinxSerializationCore" }
+material = { group = "com.google.android.material", name = "material", version.ref = "material" }
 
 [plugins]
 android-application = { id = "com.android.application", version.ref = "agp" }
+jetbrains-kotlin-serialization = { id = "org.jetbrains.kotlin.plugin.serialization", version.ref = "kotlinSerialization"}
 kotlin-android = { id = "org.jetbrains.kotlin.android", version.ref = "kotlin" }
 kotlin-compose = { id = "org.jetbrains.kotlin.plugin.compose", version.ref = "kotlin" }
 
+

mobile/settings.gradle.kts

@@ -1,3 +1,5 @@
+@file:Suppress("UnstableApiUsage")
+
 pluginManagement {
     repositories {
         google {
@@ -9,13 +11,20 @@ pluginManagement {
         }
         mavenCentral()
         gradlePluginPortal()
+        maven {
+            url = uri("https://androidx.dev/snapshots/builds/13555495/artifacts/repository")
+        }
     }
 }
+
 dependencyResolutionManagement {
     repositoriesMode.set(RepositoriesMode.FAIL_ON_PROJECT_REPOS)
     repositories {
         google()
         mavenCentral()
+        maven {
+            url = uri("https://androidx.dev/snapshots/builds/13555495/artifacts/repository")
+        }
     }
 }