Android Added Splash Screen on startup

AndroidManifest.xml

@@ -28,6 +28,7 @@
     <activity
       android:name=".KiwixMobileActivity"
       android:configChanges="orientation|keyboardHidden|screenSize|locale"
+      android:theme="@style/AppTheme.Launcher"
       android:label="@string/app_name">
       <intent-filter>
         <action android:name="android.intent.action.MAIN" />

res/drawable/launch_screen.xml

@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="utf-8"?>
+<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"/>
+  <item>
+    <bitmap
+      android:src="@drawable/splash_screen"
+      android:gravity="center"/>
+  </item>
+</layer-list>

res/values/styles.xml

@@ -25,6 +25,10 @@
     <item name="selectedBackground">@drawable/list_bg_light</item>
   </style>
 
+  <style name="AppTheme.Launcher">
+    <item name="android:windowBackground">@drawable/launch_screen</item>
+  </style>
+
   <style name="DrawerArrowStyle" parent="Widget.AppCompat.DrawerArrowToggle">
     <item name="spinBars">true</item>
   </style>

src/org/kiwix/kiwixmobile/KiwixMobileActivity.java

@@ -271,7 +271,7 @@ public class KiwixMobileActivity extends AppCompatActivity {
   @Override
   public void onCreate(Bundle savedInstanceState) {
     requestWindowFeature(Window.FEATURE_PROGRESS);
-
+    setTheme(R.style.AppTheme);
     super.onCreate(savedInstanceState);
     handleLocaleCheck();
     setContentView(R.layout.main);