AdMob Interstitial Cocos2d-x WP8

Can enyone tell me how to call AdMob Interstitial between scenes in my cocos2d-x game?

I have tried this http://robwirving.com/2014/07/21/calling-c-methods-c-winrt-components/ guide, but i don't know how to run it from cocos classes.

Is there any another ways, or some guides?

I've recently made it. You have to do few things. First of all create helper class, which will help you calling native function (I use this for all 3 platforms, but here's just windows phone):

NativeHelper.h:

#ifndef  __NATIVE_HELPER_H_
#define  __NATIVE_HELPER_H_

#include <string>
#include <functional>
#include "cocos2d.h"

using namespace std;
USING_NS_CC;

#if (CC_TARGET_PLATFORM == CC_PLATFORM_WP8)
namespace cocos2d

{

    public delegate void CSharpShowInterstitialDelegate();

    public ref class WP8NativeEventHelper sealed

    {

    public:

        void WP8NativeEventHelper::SetCSharpShowInterstitialDelegate(CSharpShowInterstitialDelegate^ delegate){

            m_CSharpShowInterstitialDelegate = delegate;

        }

        void CallShowInterstitial();

    private:

        property static CSharpShowInterstitialDelegate^ m_CSharpShowInterstitialDelegate;

    };



}
#endif

class NativeHelper
{
public:
    static void showInterstitial(string adSdk);

#if (CC_TARGET_PLATFORM == CC_PLATFORM_WP8)
    WP8NativeEventHelper^ wp8helper;
#endif

    //instance required only for setting callback
    static NativeHelper* getInstance();

    ~NativeHelper()
    {
        instanceFlag = false;
    }

private:

    static bool instanceFlag;
    static NativeHelper* instance;

    NativeHelper() {};

};

#endif // __NATIVE_HELPER_H_

So. We have special C++/CX class Wp8NativeEventHelper, which can "talk" with C#. Here we store a delegate.

How it works:

C# is calling SetCSharpShowInterstitialDelegate and passes a delegate to it, which will be remembered in static property.
Then C++\CX can call it using CallShowInterstitial.

Now NativeHelperWP.cpp:

#if (CC_TARGET_PLATFORM == CC_PLATFORM_WP8)

#ifndef  __NATIVE_HELPER_WP_H_
#define  __NATIVE_HELPER_WP_H_

#include "NativeHelper.h"

void WP8NativeEventHelper::CallShowInterstitial(){

    if (m_CSharpShowInterstitialDelegate)

    {

        m_CSharpShowInterstitialDelegate->Invoke();

    }

}

bool NativeHelper::instanceFlag = false;
NativeHelper* NativeHelper::instance = NULL;

NativeHelper* NativeHelper::getInstance()
{
    if(!instanceFlag){
        instance = new NativeHelper();
        instanceFlag = true;
        instance->wp8helper = ref new WP8NativeEventHelper();
    }

    return instance;
}

void NativeHelper::showInterstitial(){
    NativeHelper::getInstance()->wp8helper->CallShowInterstitial();
}

#endif

#endif

Here is just an implementation of CallShowInterstitial. Also in NativeHelper::showInterstitial we're calling C++/CX, which later calls c#.

Now c# code (MainPage.xaml.cs):

outside namespace:

using GoogleAds;

inside class:

  private InterstitialAd interstitialAd;

in constructor:

WP8NativeEventHelper helper = new WP8NativeEventHelper();
helper.SetCSharpShowInterstitialDelegate(showInterstitial);

and also create showInterstitial function:

public void showInterstitial() //we recreate interstitial each time, because otherwise it'll show only once, only new requests won't work
{
  interstitialAd = new InterstitialAd("MY_AD_UNIT_ID");
  AdRequest adRequest = new AdRequest();

  #if DEBUG
  // Enable test ads.
  adRequest.ForceTesting = true;
  #endif


  interstitialAd.ReceivedAd += OnAdReceived;
  interstitialAd.LoadAd(adRequest);
}

and finally OnAdReceived:

private void OnAdReceived(object sender, AdEventArgs e)
{
  System.Diagnostics.Debug.WriteLine("Ad received successfully");
  interstitialAd.ShowAd();
}

Follow this guide to setup admob: https://developers.google.com/mobile-ads-sdk/docs/admob/wp/quick-start

Now let's use this.

In HelloWorldScene.h add: