java - Libgdx 和 Google 应用内购买结果

Question

我关注了这些 instructions使用 ActionResolver 接口(interface)集成 Libgdx 和 native android 代码。我从代码的 Libgdx 部分调用 Android 方法没有问题。但是，当我尝试将 Google IAP 与 Libgdx 集成时，我遇到了死胡同。根据 TrivialDrive 示例，它使用 mPurchaseFinishedListener(在调用方法之外)。
我的问题是:由于监听器在调用方法之外，我如何将此 IAP 结果代码传递回 Libgdx？目前，购买过程已经完成，但我的代码的 libgdx 部分没有被“告知”购买状态/结果。
这是我的代码:

非常感谢任何帮助。

Action 解析器:

public interface IActionResolver {

public int requestIabPurchase(int product);

}

主要 Activity :

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?
}

}

购买界面

result = greatgame.actionResolver.requestIabPurchase(1);

Answer 1

您将无法从 requestIabPurchase() 返回结果 - 这样做的唯一方法会阻塞很长时间。在我看来，最好的方法是创建您自己的 LibGdx 项目实现的监听器接口(interface)，并将其传递到您的请求接口(interface)中。例如:

在你的 libGdx 项目中的某处:

interface PurchaseCallback {
    public int setPurchaseResult(int result);
}

Action 解析器:

public interface IActionResolver {
    public int requestIabPurchase(int product, PurchaseCallback callback);
}

在 PurchaseScreen 中，实现 PurchaseCallback:

@override
public int setPurchaseResult(int result) {
    // Yay! I have a result from a purchase! Maybe you want a boolean instead of an int? I don't know. Maybe an int (for the product code) and a boolean.
}

...并传递正在实现 PurchaseCallback 的任何内容(我假设您的 PurchaseScreen 自己执行):

result = greatgame.actionResolver.requestIabPurchase(1, this);

最后，将其全部连接到 MainActivity 中:

PurchaseCallback mCallback = null;

mPurchaseFinishedListener = ... etc. etc.
.
.
.
   if (mCallback != null) {
       mCallback.setPurchaseResult(0);
   }
.
.
.

@Override
public int requestIabPurchase(int product, PurchaseCallback callback) {
    mCallback = callback;  // save this for later

    iAbStartup();

    return 0;
}

请注意，您应该在 mPurchaseFinishedListener 有 return 的任何地方调用 PurchaseCallback.setPurchaseResult()，而不仅仅是在行 //how do i pass this result to the libgdx? - 否则，您永远不会知道购买是失败了还是花费了很长时间。