Android 应用内结算 v3 : "Can' t perform operation: queryInventory"

Question

我首次使用新的 v3 API 设置了应用内结算。它在我的设备上正常运行，但我收到了很多其他用户的错误报告。

其中一个是:

java.lang.IllegalStateException: IAB helper is not set up. Can't perform operation: queryInventory
    at my.package.util.iab.IabHelper.checkSetupDone(IabHelper.java:673)
    at my.package.util.iab.IabHelper.queryInventory(IabHelper.java:462)
    at my.package.util.iab.IabHelper$2.run(IabHelper.java:521)
    at java.lang.Thread.run(Thread.java:1019)

还有一个是:

java.lang.NullPointerException
    at my.package.activities.MainActivity$4.onIabSetupFinished(MainActivity.java:159)
    at my.package.util.iab.IabHelper$1.onServiceConnected(IabHelper.java:242)

我的 Activity 实现遵循 Google 的示例代码(示例中所有引用的类均未触及):

IabHelper mHelper;

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

    //...

    mHelper = new IabHelper(this, IAB_PUBLIC_KEY);
    mHelper.enableDebugLogging(true);

    mHelper.startSetup(new IabHelper.OnIabSetupFinishedListener() {
        public void onIabSetupFinished(IabResult result) {
            if (!result.isSuccess()) {
                // Oh noes, there was a problem.
                return;
            }

            // Hooray, IAB is fully set up. Now, let's get an inventory of
            // stuff we own.
            mHelper.queryInventoryAsync(mGotInventoryListener); //***(1)***
        }
    });
}

// Listener that's called when we finish querying the items we own
IabHelper.QueryInventoryFinishedListener mGotInventoryListener = new IabHelper.QueryInventoryFinishedListener() {
    public void onQueryInventoryFinished(IabResult result,
            Inventory inventory) {
        if (!result.isFailure()) {
            if (inventory.hasPurchase(SoundsGlobals.IAB_SKU_PREMIUM)){
                //we are premium, do things
            }
        }
        else{
            //oops
        }
    }
};

@Override
protected void onDestroy() {
    if (mHelper != null) {
        mHelper.dispose();
        mHelper = null;
    }
    super.onDestroy();
}

我假设这两个错误都来自标记为 ***(1)***

的行

这些错误的原因是什么？如果我只在 onIabSetupFinished 内调用 queryInventoryAsync，那么 mHelper 怎么可能为空，或者 mHelper没有设置好？

有人知道解决办法吗？

Answer 1

正如@Martin 解释的那样，Google In-App Billing 示例中存在导致此问题的错误。

但是，在修复它之后，我仍然在内部调用中收到一些错误(在 queryInventoryAsync 中创建的线程内的 queryInventory 在某些极少数情况下报告帮助程序不是设置)。在这种情况下，我通过添加一个额外的捕获解决了这个问题:

try {
    inv = queryInventory(querySkuDetails, moreSkus);
}
catch (IabException ex) {
    result = ex.getResult();
}
catch(IllegalStateException ex){ //ADDED THIS CATCH
    result = new IabResult(BILLING_RESPONSE_RESULT_ERROR, "Helper is not setup.");
}

我在 mHelper.dispose() 上也遇到了崩溃，我以类似的方式修复了它:

try{
    if (mContext != null) mContext.unbindService(mServiceConn);
}
catch(IllegalArgumentException ex){ //ADDED THIS CATCH
    //IGNORE IT - somehow, the service was already unregistered
}

当然，您可以将它们静默记录到 ACRA，而不是忽略这些错误，例如 :)

感谢您的所有评论。