Compatibility: drawable for black background

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

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<shape xmlns:android="http://schemas.android.com/apk/res/android"
+    android:shape="rectangle">
+    <solid android:color="@color/black" />
+</shape>

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

@@ -289,37 +289,37 @@
 
     <style name="AppThemeBlueOrangeBlack" parent="AppThemeBlueOrangeDark">
         <item name="themeName">black</item>
-        <item name="android:windowBackground">@color/black</item>
+        <item name="android:windowBackground">@drawable/black_background</item>
         <item name="colorDrawerBackground">@color/black</item>
     </style>
 
     <style name="AppThemeOrangeBlueBlack" parent="AppThemeOrangeBlueDark">
         <item name="themeName">black</item>
-        <item name="android:windowBackground">@color/black</item>
+        <item name="android:windowBackground">@drawable/black_background</item>
         <item name="colorDrawerBackground">@color/black</item>
     </style>
 
     <style name="AppThemeYellowPurpleBlack" parent="AppThemeYellowPurpleDark">
         <item name="themeName">black</item>
-        <item name="android:windowBackground">@color/black</item>
+        <item name="android:windowBackground">@drawable/black_background</item>
         <item name="colorDrawerBackground">@color/black</item>
     </style>
 
     <style name="AppThemePurpleYellowBlack" parent="AppThemePurpleYellowDark">
         <item name="themeName">black</item>
-        <item name="android:windowBackground">@color/black</item>
+        <item name="android:windowBackground">@drawable/black_background</item>
         <item name="colorDrawerBackground">@color/black</item>
     </style>
 
     <style name="AppThemeRedGreenBlack" parent="AppThemeRedGreenDark">
         <item name="themeName">black</item>
-        <item name="android:windowBackground">@color/black</item>
+        <item name="android:windowBackground">@drawable/black_background</item>
         <item name="colorDrawerBackground">@color/black</item>
     </style>
 
     <style name="AppThemeGreenRedBlack" parent="AppThemeGreenRedDark">
         <item name="themeName">black</item>
-        <item name="android:windowBackground">@color/black</item>
+        <item name="android:windowBackground">@drawable/black_background</item>
         <item name="colorDrawerBackground">@color/black</item>
     </style>
 
@@ -334,7 +334,7 @@
         <item name="colorInfoForeground">@color/white</item>
         <item name="colorInfoBackground">@color/blackPrimary</item>
 
-        <item name="android:windowBackground">@color/black</item>
+        <item name="android:windowBackground">@drawable/black_background</item>
         <item name="colorDrawerBackground">@color/black</item>
     </style>
 
@@ -369,7 +369,7 @@
         <item name="colorInfoForeground">@color/white</item>
         <item name="colorInfoBackground">@color/greyPrimary</item>
 
-        <item name="android:windowBackground">@color/black</item>
+        <item name="android:windowBackground">@drawable/black_background</item>
         <item name="colorDrawerBackground">@color/black</item>
     </style>