launch_screen.xml

<?xml version="1.0" encoding="utf-8"?>

<!-- The android:opacity=”opaque” line — this is critical in preventing a flash of black as your theme transitions. -->
<layer-list xmlns:android="http://schemas.android.com/apk/res/android" android:opacity="opaque">
  
  <!-- The background color, preferably the same as your normal theme -->
  <item android:drawable="@android:color/white"/>
  
  <!-- Your product logo - 144dp color version of your app icon -->
  <item>
    
    <bitmap
      android:src="@drawable/product_logo_144dp"
      android:gravity="center"/>
    
  </item>
  
</layer-list>