Add startup splash screen

.idea/misc.xml

@@ -6,6 +6,8 @@
         <entry key="app/src/main/res/drawable-v24/ic_launcher_foreground.xml" value="0.3859375" />
         <entry key="app/src/main/res/drawable/ic_launcher_background.xml" value="0.3859375" />
         <entry key="app/src/main/res/drawable/ic_launcher_foreground.xml" value="0.2234375" />
+        <entry key="app/src/main/res/drawable/splashscreen.xml" value="0.3859375" />
+        <entry key="app/src/main/res/mipmap-anydpi-v26/ic_launcher.xml" value="0.3859375" />
       </map>
     </option>
   </component>

app/src/main/AndroidManifest.xml

@@ -11,7 +11,8 @@
         android:theme="@style/Theme.DCCAggregator">
         <activity
             android:name=".MainActivity"
-            android:exported="true">
+            android:exported="true"
+            android:theme="@style/SplashTheme">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
 

app/src/main/java/org/communiquons/dccaggregator/MainActivity.kt

@@ -1,14 +1,16 @@
 package org.communiquons.dccaggregator
 
-import androidx.appcompat.app.AppCompatActivity
 import android.os.Bundle
+import androidx.appcompat.app.AppCompatActivity
 import androidx.appcompat.app.AppCompatDelegate
 
 class MainActivity : AppCompatActivity() {
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
+        setTheme(R.style.Theme_DCCAggregator)
         setContentView(R.layout.activity_main)
 
+
         AppCompatDelegate.setDefaultNightMode(AppCompatDelegate.MODE_NIGHT_YES)
     }
 }

app/src/main/res/drawable/splashscreen.xml

@@ -0,0 +1,15 @@
+<?xml version="1.0" encoding="utf-8"?>
+<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
+    <item>
+        <shape android:shape="rectangle">
+            <solid android:color="#000000" />
+        </shape>
+    </item>
+
+    <!-- You can insert your own image assets here -->
+    <item>
+        <bitmap
+            android:gravity="center"
+            android:src="@drawable/splash_logo" />
+    </item>
+</layer-list>

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

@@ -13,4 +13,9 @@
         <item name="android:statusBarColor" tools:targetApi="l">?attr/colorPrimaryVariant</item>
         <!-- Customize your theme here. -->
     </style>
+
+    <!-- Startup splash screen -->
+    <style name="SplashTheme" parent="Theme.DCCAggregator">
+        <item name="android:windowBackground">@drawable/splashscreen</item>
+    </style>
 </resources>

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

@@ -13,4 +13,9 @@
         <item name="android:statusBarColor" tools:targetApi="l">?attr/colorPrimaryVariant</item>
         <!-- Customize your theme here. -->
     </style>
+
+    <!-- Startup splash screen -->
+    <style name="SplashTheme" parent="Theme.DCCAggregator">
+        <item name="android:windowBackground">@drawable/splashscreen</item>
+    </style>
 </resources>