adding a launcher black splash activity

app/src/main/AndroidManifest.xml

@@ -20,15 +20,21 @@
         android:label="@string/app_launcher_name"
         android:roundIcon="@mipmap/ic_launcher_round"
         android:theme="@style/AppTheme">
+
         <activity
-            android:name=".activities.MainActivity"
-            android:screenOrientation="portrait"
-            android:theme="@style/FullScreenTheme">
+            android:name=".activities.SplashActivity"
+            android:theme="@style/SplashTheme">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN"/>
 
                 <category android:name="android.intent.category.LAUNCHER"/>
             </intent-filter>
+        </activity>
+
+        <activity
+            android:name=".activities.MainActivity"
+            android:screenOrientation="portrait"
+            android:theme="@style/FullScreenTheme">
 
             <intent-filter>
                 <action android:name="android.media.action.IMAGE_CAPTURE"/>

app/src/main/kotlin/com/simplemobiletools/camera/activities/SplashActivity.kt

@@ -0,0 +1,13 @@
+package com.simplemobiletools.camera.activities
+
+import android.content.Intent
+import android.os.Bundle
+import com.simplemobiletools.commons.activities.BaseSimpleActivity
+
+open class SplashActivity : BaseSimpleActivity() {
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        startActivity(Intent(this, MainActivity::class.java))
+        finish()
+    }
+}