OnApplicationQuit and CancelQuit on Android not working?

I tried out the script from http://docs.unity3d.com/ScriptReference/Application.CancelQuit.html (code below) to load a splash screen on application exit. It somehow does not work on Android. Also a script with only Application.CancelQuit does not prevent the app from closing. Is this not supported on android or is there something special required?

 using UnityEngine;
 using System.Collections;
 
 public class ExampleClass : MonoBehaviour {
     public float showSplashTimeout = 2.0F;
     private bool allowQuitting = false;

     void OnApplicationQuit() {
         if (Application.loadedLevelName.ToLower() != "finalsplash")
             StartCoroutine("DelayedQuit");
         
         if (!allowQuitting)
             Application.CancelQuit();
         
     }
     IEnumerator DelayedQuit() {
         Application.LoadLevel("finalsplash");
         yield return new WaitForSeconds(showSplashTimeout);
         allowQuitting = true;
         Application.Quit();
     }
 }