AskQuit

using UnityEngine;
using System.Collections;
/// <summary>
/// An extra script for this repository: https://github.com/paganini24/UnityAndroidExtraPlugins
/// </summary>
public class AskQuit : MonoBehaviour {
    int count = 0;

    void Start ()
       {
          UnityAndroidExtras.instance.Init();
    }


    void Update () {
        if(Input.GetKeyDown(KeyCode.Escape))
        {
            count++;
            if (count == 1)
                UnityAndroidExtras.instance.makeToast("Please press back button again to exit", 1);
            else if (count == 2)
                Application.Quit();
        }
    }
}