icon, import via Android Studio so that it works on all versions of Android.

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

@@ -0,0 +1,20 @@
+<?xml version="1.0" encoding="utf-8"?>
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="108dp"
+    android:height="108dp"
+    android:viewportWidth="273"
+    android:viewportHeight="168.75">
+  <group android:scaleX="0.46"
+      android:scaleY="0.28434065"
+      android:translateX="73.71"
+      android:translateY="60.38376">
+    <group android:translateY="133.59375">
+      <path android:pathData="M57.375,-102.375L57.375,-0L32.703125,-0L32.703125,-102.375L57.375,-102.375ZM88.171875,-102.375L88.171875,-83.328125L2.609375,-83.328125L2.609375,-102.375L88.171875,-102.375Z"
+          android:fillColor="#000000"/>
+      <path android:pathData="M148.375,-102.375L148.375,0L123.703125,0L123.703125,-102.375L148.375,-102.375ZM179.17188,-102.375L179.17188,-83.328125L93.609375,-83.328125L93.609375,-102.375L179.17188,-102.375Z"
+          android:fillColor="#000000"/>
+      <path android:pathData="M239.375,-102.375L239.375,0L214.70312,0L214.70312,-102.375L239.375,-102.375ZM270.17188,-102.375L270.17188,-83.328125L184.60938,-83.328125L184.60938,-102.375L270.17188,-102.375Z"
+          android:fillColor="#000000"/>
+    </group>
+  </group>
+</vector>

app/src/main/res/mipmap-anydpi-v26/ic_launcher.xml

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
-    <background android:drawable="@drawable/ic_launcher_background" />
+    <background android:drawable="@color/ic_launcher_background"/>
-    <foreground android:drawable="@drawable/ic_launcher_foreground" />
+    <foreground android:drawable="@mipmap/ic_launcher_foreground"/>
-    <monochrome android:drawable="@drawable/ic_launcher_foreground" />
+    <monochrome android:drawable="@drawable/ic_launcher_monochrome"/>
 </adaptive-icon>

app/src/main/res/mipmap-anydpi-v26/ic_launcher_round.xml

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
-    <background android:drawable="@drawable/ic_launcher_background" />
+    <background android:drawable="@color/ic_launcher_background"/>
-    <foreground android:drawable="@drawable/ic_launcher_foreground" />
+    <foreground android:drawable="@mipmap/ic_launcher_foreground"/>
-    <monochrome android:drawable="@drawable/ic_launcher_foreground" />
+    <monochrome android:drawable="@drawable/ic_launcher_monochrome"/>
 </adaptive-icon>

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

@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <color name="ic_launcher_background">#333333</color>
+</resources>