我的onIabPurchaseFinishedListener从未被调用，即使我在inapp对话框中点击立即购买，logcat也没有打印任何内容。publicclassCreateAlbumActivityextendsActivity{IabHelpermHelper;@OverrideprotectedvoidonCreate(BundlesavedInstanceState){super.onCreate(savedInstanceState);setContentView(R.layout.activity_create_album);mHelper=newIabHelper(