Forms 1.3.1 Android Splash Screen : Here's How

Create 2 Activities in your Solution. SplashScreen.cs and MainActitivity.cs

The SplashScreen.cs is set as the Launcher and just calls the MainActitivty.cs.

    [Activity(
        Label = "Baha'i App",
        Icon = "@drawable/icon",
        Theme = "@style/Theme.Splash",
        MainLauncher = true,
        NoHistory = true,
        ConfigurationChanges = ConfigChanges.ScreenSize | ConfigChanges.Orientation)]
    public class SplashScreen : Activity  
    {
        protected override void OnCreate(Bundle bundle)
        {
            base.OnCreate(bundle);
            var intent = new Intent(this, typeof (MainActivity));
            StartActivity(intent);
        }
    }

And the MainActivity....

    [Activity(
        MainLauncher = false ,
        Label = "UDS",
        Icon = "@drawable/icon",
        Theme = "@style/AppTheme",
        ConfigurationChanges = ConfigChanges.ScreenSize | ConfigChanges.Orientation
        )]
    public class MainActivity : FormsApplicationActivity 
    {
        protected override void OnCreate(Bundle bundle)
        {
            base.OnCreate(bundle);
            global::Xamarin.Forms.Forms.Init(this, bundle);
            LoadApplication(new UDS.UI.App());  
        }
    }

Then you just need a pretty Splash Screen, so add a MySplash.xml under the Resources/values in the Android project.

<?xml version="1.0" encoding="utf-8" ?>
<resources>
  <style name="Theme.Splash" parent="@android:style/Theme.Holo.Light">
    <item name="android:windowBackground">@drawable/splashscreen</item>
    <item name="android:windowNoTitle">true</item>
    <item name="android:windowIsTranslucent">false</item>
    <item name="android:windowIsFloating">false</item>
    <item name="android:backgroundDimEnabled">true</item>
  </style>
</resources>

A nice centered "drawable/splash.png" image is made by the file drawable/splashscreen.xml:

    <?xml version="1.0" encoding="utf-8" ?>
    <bitmap xmlns:android="http://schemas.android.com/apk/res/android"
      android:src="@drawable/splash"
      android:gravity="center"
      android:layout_gravity="center"/>