Seguí estosinstrucciones para integrar tanto Libgdx como el código nativo de Android mediante la interfaz ActionResolver. No tengo ningún problema para llamar al método Android desde la parte de Libgdx de mi código. Pero estoy llegando a un callejón sin salida cuando estoy tratando de integrar Google IAP con Libgdx. De acuerdo con el ejemplo de TrivialDrive, usa mPurchaseFinishedListener (fuera del método de llamada).
Mi pregunta es: ¿cómo transfiero este código de resultado IAP a Libgdx ya que el oyente está fuera del método de llamada? Actualmente, el proceso de compra se realizó, pero la parte libgdx de mi código no está siendo "informada" del estado / resultado de la compra.
Este es mi código:

Cualquier ayuda es muy apreciada.

ActionResolver:

public interface IActionResolver {

public int requestIabPurchase(int product);

}

Actividad principal:

public class MainActivity extends AndroidApplication implements IActionResolver {

// Debug tag, for logging
static final String TAG = "greatgame";

// Does the user have the premium upgrade?
boolean mIsUpgraded = false;

// SKUs for our products: the cat, all, or pow
static final String SKU_UPGRADE = "android.test.purchased";

// (arbitrary) request code for the purchase flow
static final int RC_REQUEST = 10001;

// The helper object
IabHelper mHelper;

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    requestWindowFeature(Window.FEATURE_NO_TITLE);
    getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);
    getWindow().clearFlags(WindowManager.LayoutParams.FLAG_FORCE_NOT_FULLSCREEN);
    getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);

    AndroidApplicationConfiguration cfg = new AndroidApplicationConfiguration();
    cfg.useGL20 = false;

    initialize(new Catland(this), cfg);
}

void iAbStartup() {

    String base64EncodedPublicKey = "some key";

    // Create the helper, passing it our context and the public key to verify signatures with
    Log.d(TAG, "Creating IAB helper.");
    mHelper = new IabHelper(this, base64EncodedPublicKey);

    // enable debug logging (for a production application, you should set this to false).
    mHelper.enableDebugLogging(true);

    // Start setup. This is asynchronous and the specified listener
    // will be called once setup completes.
    Log.d(TAG, "Starting setup.");
    mHelper.startSetup(new IabHelper.OnIabSetupFinishedListener() {
        public void onIabSetupFinished(IabResult result) {
            Log.d(TAG, "Setup finished.");

            if (!result.isSuccess()) {
                // Oh noes, there was a problem.
                Log.d(TAG, "Problem setting up in-app billing: " + result);
                return;
            }

            // Have we been disposed of in the meantime? If so, quit.
            if (mHelper == null) {
                return;
            }

            // IAB is fully set up. Now, let's get an inventory of stuff we own.
            Log.d(TAG, "Setup successful. Querying inventory.");
            mHelper.queryInventoryAsync(mGotInventoryListener);
        }
    });
}

// Listener that's called when we finish querying the items and subscriptions we own
IabHelper.QueryInventoryFinishedListener mGotInventoryListener = new IabHelper.QueryInventoryFinishedListener() {
    public void onQueryInventoryFinished(IabResult result, Inventory inventory) {
        Log.d(TAG, "Query inventory finished.");

        // Have we been disposed of in the meantime? If so, quit.
        if (mHelper == null) {
            return;
        }

        // Is it a failure?
        if (result.isFailure()) {
            Log.d(TAG, "Failed to query inventory: " + result);
            return;
        }

        Log.d(TAG, "Query inventory was successful.");

        // Do we have the SKU_UPGRADE upgrade?
        Purchase thisUpgrade = inventory.getPurchase(SKU_UPGRADE);
        mIsUpgraded = (thisUpgrade != null && verifyDeveloperPayload(thisUpgrade));
        Log.d(TAG, "User is " + (mIsUpgraded ? "Upgraded" : "Free"));
        Log.d(TAG, "Initial inventory query finished; enabling main UI.");
        runPurchaseFlow(submitProduct);
    }
};

// Run real purchase flow
public void runPurchaseFlow(int product) {
    Log.d(TAG, "runPurchaseFlow");

    /* TODO: for security, generate your payload here for verification. See the comments on
     *        verifyDeveloperPayload() for more info. Since this is a SAMPLE, we just use
     *        an empty string, but on a production app you should carefully generate this. */
    String payload = "";

    if (product == 1) 
        mHelper.launchPurchaseFlow(this, SKU_UPGRADE, RC_REQUEST, mPurchaseFinishedListener, payload);

}

// Callback for when a purchase is finished
IabHelper.OnIabPurchaseFinishedListener mPurchaseFinishedListener = new IabHelper.OnIabPurchaseFinishedListener() {
    public void onIabPurchaseFinished(IabResult result, Purchase purchase) {
        Log.d(TAG, "Purchase finished: " + result + ", purchase: " + purchase);

        // if we were disposed of in the meantime, quit.
        if (mHelper == null) return;

        if (result.isFailure()) {
            Log.d(TAG, "Error purchasing: " + result);
            return;
        }
        if (!verifyDeveloperPayload(purchase)) {
            Log.d(TAG, "Error purchasing. Authenticity verification failed.");
            return;
        }

        Log.d(TAG, "Purchase successful.");

        if (purchase.getSku().equals(SKU_CAT)) {
            // bought the upgrade!
            Log.d(TAG, "Purchase Upgrade. Congratulating user.");
            mIsUpgraded = true;
    // how do i pass this result to the libgdx?

        }
    }
};

/** Verifies the developer payload of a purchase. */
boolean verifyDeveloperPayload(Purchase p) {
    String payload = p.getDeveloperPayload();
    return true;
}

@Override
public int requestIabPurchase(int product) {

    iAbStartup();

    return 0; // how do i get the result from mPurchaseFinishedListener?
}

}

CompraScreen

result = greatgame.actionResolver.requestIabPurchase(1);