Backport splash screen to API 26 (#2747)

app/src/google/AndroidManifest.xml

@@ -29,7 +29,7 @@
         android:label="@string/app_name"
         android:supportsRtl="true"
         android:hardwareAccelerated="true"
-        android:theme="@style/AppTheme"
+        android:theme="@style/SplashTheme"
         android:localeConfig="@xml/locales_config">
         <meta-data
             android:name="com.google.android.geo.API_KEY"

app/src/main/AndroidManifest.xml

@@ -104,7 +104,7 @@
         android:label="@string/app_name"
         android:supportsRtl="true"
         android:hardwareAccelerated="true"
-        android:theme="@style/AppTheme"
+        android:theme="@style/SplashTheme"
         android:localeConfig="@xml/locales_config">
 
         <!-- Default crash collection and analytics off until we (possibly) turn it on in application.onCreate -->

app/src/main/java/com/geeksville/mesh/MainActivity.kt

@@ -44,6 +44,7 @@ import androidx.compose.runtime.setValue
 import androidx.compose.ui.platform.LocalView
 import androidx.core.content.edit
 import androidx.core.net.toUri
+import androidx.core.splashscreen.SplashScreen.Companion.installSplashScreen
 import androidx.lifecycle.lifecycleScope
 import com.geeksville.mesh.android.BindFailedException
 import com.geeksville.mesh.android.GeeksvilleApplication
@@ -80,6 +81,7 @@ class MainActivity :
     private var showAppIntro by mutableStateOf(false)
 
     override fun onCreate(savedInstanceState: Bundle?) {
+        installSplashScreen()
         enableEdgeToEdge(
             // Disable three-button navbar scrim on pre-Q devices
             navigationBarStyle = SystemBarStyle.auto(Color.TRANSPARENT, Color.TRANSPARENT),

app/src/main/res/drawable-anydpi/ic_splash.xml

@@ -0,0 +1,21 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="108dp"
+    android:height="108dp"
+    android:viewportWidth="108"
+    android:viewportHeight="108">
+  <group android:scaleX="2.4944882"
+      android:scaleY="2.4944882"
+      android:translateX="18.36"
+      android:translateY="18.36">
+    <path
+        android:pathData="m17.5564,11.8482 l-5.208,7.6376 -1.5217,-1.0377 5.9674,-8.7512c0.1714,-0.2513 0.4558,-0.4019 0.76,-0.4022 0.3042,-0.0003 0.5889,0.1497 0.7608,0.4008l5.9811,8.7374 -1.5199,1.0404z"
+        android:strokeLineJoin="round"
+        android:fillColor="@color/ic_splash"
+        android:fillType="evenOdd"/>
+    <path
+        android:pathData="m5.854,19.4956 l6.3707,-9.3423 -1.5749,-1.0739 -6.3707,9.3423z"
+        android:strokeLineJoin="round"
+        android:fillColor="@color/ic_splash"
+        android:fillType="evenOdd"/>
+  </group>
+</vector>

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

@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="utf-8"?><!--
+     Copyright (c) 2025 Meshtastic LLC
+
+     This program is free software: you can redistribute it and/or modify
+     it under the terms of the GNU General Public License as published by
+     the Free Software Foundation, either version 3 of the License, or
+     (at your option) any later version.
+
+     This program is distributed in the hope that it will be useful,
+     but WITHOUT ANY WARRANTY; without even the implied warranty of
+     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+     GNU General Public License for more details.
+
+     You should have received a copy of the GNU General Public License
+     along with this program.  If not, see <https://www.gnu.org/licenses/>.
+-->
+<resources>
+    <color name="ic_splash">#FFFFFF</color>
+</resources>

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

@@ -0,0 +1,27 @@
+<?xml version="1.0" encoding="utf-8"?><!--
+     Copyright (c) 2025 Meshtastic LLC
+
+     This program is free software: you can redistribute it and/or modify
+     it under the terms of the GNU General Public License as published by
+     the Free Software Foundation, either version 3 of the License, or
+     (at your option) any later version.
+
+     This program is distributed in the hope that it will be useful,
+     but WITHOUT ANY WARRANTY; without even the implied warranty of
+     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+     GNU General Public License for more details.
+
+     You should have received a copy of the GNU General Public License
+     along with this program.  If not, see <https://www.gnu.org/licenses/>.
+-->
+
+<resources xmlns:tools="http://schemas.android.com/tools">
+
+    <!-- Shim in the system UI overrides -->
+    <style name="SplashTheme.NightAdjusted" parent="Theme.SplashScreen">
+        <item name="android:windowLightStatusBar">false</item>
+        <item name="android:windowLightNavigationBar" tools:targetApi="27">false</item>
+        <item name="windowSplashScreenBackground">#000000</item>
+    </style>
+
+</resources>

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

@@ -16,4 +16,5 @@
 -->
 <resources>
     <color name="ic_launcher_background">#67ea94</color>
+    <color name="ic_splash">#000000</color>
 </resources>

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

@@ -15,8 +15,20 @@
      along with this program.  If not, see <https://www.gnu.org/licenses/>.
 -->
 
-<resources>
+<resources xmlns:tools="http://schemas.android.com/tools">
 
-    <style name="AppTheme" parent="Theme.Material3.DynamicColors.DayNight.NoActionBar"/>
+    <!-- Shim in the system UI overrides -->
+    <style name="SplashTheme.NightAdjusted" parent="Theme.SplashScreen">
+        <item name="android:windowLightStatusBar">true</item>
+        <item name="android:windowLightNavigationBar" tools:targetApi="27">true</item>
+        <item name="windowSplashScreenBackground">#FFFFFF</item>
+    </style>
+
+    <style name="SplashTheme" parent="SplashTheme.NightAdjusted">
+        <item name="windowSplashScreenAnimatedIcon">@drawable/ic_splash</item>
+        <item name="postSplashScreenTheme">@style/AppTheme</item>
+    </style>
+
+    <style name="AppTheme" parent="Theme.Material3.DynamicColors.DayNight.NoActionBar" />
 
 </resources>