안드로이드 인앱결제가 안됩니다

Question

butbutton에 인앱결제를 적용하려고 하는데 안되네요...

bubutton 누르면 한번까지는 결제를 성공하는데 그리곤 바로 어플이 꺼져버립니다.

그리고 그 다음부터는 buybutton 자체가 안 눌려집니다.

아래 코드에 문제가 있는거 같지는 않은데 제가 잘못본건지..ㅠㅠ

 

static final String ITEM_SKU = "dongjaunse";
       private Button buyButton;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_in_app_billing);

        buyButton = (Button)findViewById(R.id.buyButton);
        String base64EncodedPublicKey =
                "<인증키>";
        mHelper = new IabHelper(this, base64EncodedPublicKey);

        mHelper.startSetup(new IabHelper.OnIabSetupFinishedListener() {
            public void onIabSetupFinished(IabResult result) {
                if (!result.isSuccess()) {
                    Log.d(TAG, "In-app Billing setup failed: " +
                            result);
                } else {
                    Log.d(TAG, "In-app Billing is set up OK");
                }
            }
        });
    }


    public void buyClick(View view) {
        mHelper.launchPurchaseFlow(this, ITEM_SKU, 10001,
                mPurchaseFinishedListener, "mypurchasetoken");
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode,
                                    Intent data)
    {
        if (!mHelper.handleActivityResult(requestCode,
                resultCode, data)) {
            super.onActivityResult(requestCode, resultCode, data);
        }
    }

    IabHelper.OnIabPurchaseFinishedListener mPurchaseFinishedListener
            = new IabHelper.OnIabPurchaseFinishedListener() {
        public void onIabPurchaseFinished(IabResult result,
                                          Purchase purchase)
        {
            if (result.isFailure()) {
                // 에러 처리 코드
                return;
            }
            else if (purchase.getSku().equals(ITEM_SKU)) {
                consumeItem();

            }

        }
    };

    public void consumeItem() {
        mHelper.queryInventoryAsync(mReceivedInventoryListener);
    }

    IabHelper.QueryInventoryFinishedListener mReceivedInventoryListener
            = new IabHelper.QueryInventoryFinishedListener() {
        public void onQueryInventoryFinished(IabResult result,
                                             Inventory inventory) {

            if (result.isFailure()) {
                // 에러 처리 코드
            } else {
                mHelper.consumeAsync(inventory.getPurchase(ITEM_SKU),
                        mConsumeFinishedListener);
            }
        }
    };

    IabHelper.OnConsumeFinishedListener mConsumeFinishedListener =
            new IabHelper.OnConsumeFinishedListener() {
                public void onConsumeFinished(Purchase purchase,
                                              IabResult result) {

                    if (result.isSuccess()) {

                    } else {
                        // 에러 처리 코드
                    }
                }
            };


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