Implement splash screen with red background to match XML version branding (#43)

* feat: implement splash screen with red background for brand consistency

- Add SplashScreen API implementation to match XML version's red background
- Create custom splash theme in core:designsystem module
- Add Pokemon-themed splash icon and red background
- Ensure smooth transition from splash to main content
- Maintain brand consistency between XML and Compose versions

* Applied Spotless check

* Delete implementation from gradle:app because we are already adding splash from core:designsystem

Author: XDdevv

app/src/main/AndroidManifest.xml

@@ -26,7 +26,7 @@ xmlns:tools="http://schemas.android.com/tools">
   android:icon="@mipmap/ic_launcher"
   android:label="@string/app_name"
   android:supportsRtl="true"
-  android:theme="@style/Theme.PokedexCompose"
+  android:theme="@style/Theme.PokedexCompose.Splash"
   tools:ignore="AllowBackup">
 
   <activity

app/src/main/kotlin/com/skydoves/pokedex/compose/MainActivity.kt

@@ -21,6 +21,7 @@ import androidx.activity.ComponentActivity
 import androidx.activity.compose.setContent
 import androidx.activity.enableEdgeToEdge
 import androidx.compose.runtime.CompositionLocalProvider
+import androidx.core.splashscreen.SplashScreen.Companion.installSplashScreen
 import com.skydoves.pokedex.compose.core.navigation.AppComposeNavigator
 import com.skydoves.pokedex.compose.core.navigation.LocalComposeNavigator
 import com.skydoves.pokedex.compose.core.navigation.PokedexScreen
@@ -35,6 +36,7 @@ class MainActivity : ComponentActivity() {
   internal lateinit var composeNavigator: AppComposeNavigator<PokedexScreen>
 
   override fun onCreate(savedInstanceState: Bundle?) {
+    installSplashScreen()
     enableEdgeToEdge()
     super.onCreate(savedInstanceState)
 

core/designsystem/build.gradle.kts

@@ -15,6 +15,9 @@ dependencies {
   api(libs.landscapist.placeholder)
   api(libs.landscapist.palette)
 
+  // splash screen
+  api(libs.androidx.core.splashscreen)
+
   api(libs.androidx.compose.runtime)
   api(libs.androidx.compose.ui)
   api(libs.androidx.compose.ui.tooling)

core/designsystem/src/main/res/drawable/ic_logo.png

@@ -0,0 +1,20 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+    Designed and developed by 2024 skydoves (Jaewoong Eum)
+
+    Licensed under the Apache License, Version 2.0 (the "License");
+    you may not use this file except in compliance with the License.
+    You may obtain a copy of the License at
+
+      http://www.apache.org/licenses/LICENSE-2.0
+
+    Unless required by applicable law or agreed to in writing, software
+    distributed under the License is distributed on an "AS IS" BASIS,
+    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+    See the License for the specific language governing permissions and
+    limitations under the License.
+-->
+<inset xmlns:android="http://schemas.android.com/apk/res/android"
+  android:drawable="@drawable/ic_logo"
+  android:inset="32dp"
+  />

core/designsystem/src/main/res/drawable/ic_splash.xml

@@ -21,4 +21,10 @@
     <item name="android:navigationBarColor">@android:color/transparent</item>
   </style>
 
+  <style name="Theme.PokedexCompose.Splash" parent="Theme.SplashScreen">
+    <item name="windowSplashScreenAnimatedIcon">@drawable/ic_splash</item>
+    <item name="windowSplashScreenBackground">@color/colorPrimary</item>
+    <item name="postSplashScreenTheme">@style/Theme.PokedexCompose</item>
+  </style>
+
 </resources>

core/designsystem/src/main/res/values/styles.xml

@@ -1,5 +1,6 @@
 [versions]
 agp = "8.12.0"
+coreSplashscreen = "1.0.1"
 kotlin = "2.2.10"
 ksp = "2.2.0-2.0.2"
 kotlinxImmutable = "0.4.0"
@@ -38,6 +39,7 @@ spotless = "6.25.0"
 baselineprofile = "1.4.0"
 
 [libraries]
+androidx-core-splashscreen = { module = "androidx.core:core-splashscreen", version.ref = "coreSplashscreen" }
 androidx-room-runtime = { module = "androidx.room:room-runtime", version.ref = "androidxRoom" }
 androidx-room-ktx = { module = "androidx.room:room-ktx", version.ref = "androidxRoom" }
 androidx-room-compiler = { module = "androidx.room:room-compiler", version.ref = "androidxRoom" }