InApp Purchase RESTORE_TRANSACTIONS, I am not able to figure the code out

Question

I am adding a in app purchase in my coding, it's working well while purchase but gives error and application closes when I try to add Restore_Transaction code when application is removed and installed again, I have added below coding

in onCreate i wrote

startService(new Intent(mContext, BillingService.class));
        BillingHelper.setCompletedHandler(mTransactionHandler);

        if (BillingHelper.isBillingSupported()) {
            BillingHelper.restoreTransactionInformation(BillingSecurity
                    .generateNonce());
        }

and then i called handler using

public Handler mTransactionHandler = new Handler() {
        public void handleMessage(android.os.Message msg) {
            if (BillingHelper.latestPurchase.isPurchased()) {
                showItem();
            }
        };
    };

    private void showItem() {
        purchased = Purchased.getPurchaseInfo(getApplicationContext());
        if (purchased == null) {
            Date d = new Date();
            Toast.makeText(getApplicationContext(), "--- Upgrated ---",
                    Toast.LENGTH_LONG).show();
            purchased = new Purchased(getApplicationContext());
            purchased.isPurchased = 1;
            purchased.purchasedDate = d.getTime();
            purchased.save();
            Intent intent = new Intent(ActorGenieActivity.this,
                    SplashScreen.class);
            startActivity(intent);
        }
    }

Answer 1

I found the answer to my question, thanx to anddev

You have to check for purchases not to be null

public static void verifyPurchase(String signedData, String signature) {
    ArrayList<VerifiedPurchase> purchases = BillingSecurity.verifyPurchase(
            signedData, signature);
    if (purchases != null && !purchases.isEmpty()) {
        latestPurchase = purchases.get(0);
        confirmTransaction(new String[] { latestPurchase.notificationId });
        if (mCompletedHandler != null) {
            mCompletedHandler.sendEmptyMessage(0);
        } else {
            Log
                    .e(
                            TAG,
                            "verifyPurchase error. Handler not instantiated. Have you called setCompletedHandler()?");
        }
    }
}

and in Confirm_Notification u hav to check for

if (notifyIds[0] != null)

Answer 2

Follow this:

    confirmTransaction(new String[] { latestPurchase.notificationId });

here and do this:

protected static void confirmTransaction(String[] notifyIds) {
        if (amIDead()) {
            return;
        }
        // there isn't a notifyid then this was the restore transaction call and this should be skipped 
        if (notifyIds[0] != null){
        Log.i(TAG, "confirmTransaction()");
        Bundle request = makeRequestBundle("CONFIRM_NOTIFICATIONS");
             ......
             ......
}

Works like a charm form me.. Thanks Guys...