Develop Reference

Know when a suscription was cancelled - Play Billing 1.0

I'm using this tuto to integrate Play Billing Library to my app: http://www.androidrey.com/implement-play-billing-library-in-android-application/ and all works good ... well, not at all. I have problems to know when a suscription was cancelled, I tested all the methods to find a resultCode or something to know this state, but have a method that I could not implement. Could be this the problem?
class: BillingManager.java
public void queryPurchases() {
Runnable queryToExecute = new Runnable() {
#Override
public void run() {
long time = System.currentTimeMillis();
Purchase.PurchasesResult purchasesResult = billingClient.queryPurchases(BillingClient.SkuType.INAPP);
if (areSubscriptionsSupported()) {
Purchase.PurchasesResult subscriptionResult
= billingClient.queryPurchases(BillingClient.SkuType.SUBS);
System.out.println("QUERY 0");
if (subscriptionResult.getResponseCode() == BillingClient.BillingResponse.OK) {
purchasesResult.getPurchasesList().addAll(
subscriptionResult.getPurchasesList());
System.out.println("QUERY 1");
} else {
// Handle any error response codes.
}
} else if (purchasesResult.getResponseCode() == BillingClient.BillingResponse.OK) {
// Skip subscription purchases query as they are not supported.
System.out.println("QUERY 2");
} else {
// Handle any other error response codes.
System.out.println("QUERY 3");
}
onQueryPurchasesFinished(purchasesResult);
System.out.println("QUERY RESULT "+ purchasesResult);
}
};
executeServiceRequest(queryToExecute);
}
private void onQueryPurchasesFinished(Purchase.PurchasesResult result) {
// Have we been disposed of in the meantime? If so, or bad result code, then quit
if (billingClient == null || result.getResponseCode() != BillingClient.BillingResponse.OK) {
Log.w(TAG, "Billing client was null or result code (" + result.getResponseCode()
+ ") was bad – quitting");
return;
}
Log.d(TAG, "Query inventory was successful.");
// Update the UI and purchases inventory with new list of purchases
// mPurchases.clear();
onPurchasesUpdated(BillingClient.BillingResponse.OK, result.getPurchasesList());
}
public boolean areSubscriptionsSupported() {
int responseCode = billingClient.isFeatureSupported(BillingClient.FeatureType.SUBSCRIPTIONS);
if (responseCode != BillingClient.BillingResponse.OK) {
Log.w(TAG, "areSubscriptionsSupported() got an error response: " + responseCode);
}
return responseCode == BillingClient.BillingResponse.OK;
}
It is supposed to be called here: MyBillingUpdateListener.java
public class MyBillingUpdateListener implements BillingManager.BillingUpdatesListener {
//final BillingManager billingManager = new BillingManager(,this );
#Override
public void onBillingClientSetupFinished() {
//billingManager.queryPurchases(); THIS IS WHAT I COULD NOT IMPLEMENT
}
Any help is welcome, thanks!.

Play Billing 1.0 does not have the concept of purchase states (anymore), so there currently is no way to get this information using the Play Billing library.
My understanding is that queryPurchases is supposed to return actual valid purchases only. However, it gets the information from a long living cache and you have no way of updating it manually.
onBillingClientSetupFinished is completely unrelated.
Here is an active discussion on the subject: https://github.com/googlesamples/android-play-billing/issues/122

How can I implement restore purchase in android

Thanks for visiting my page.
Few days ago, I've developed simple android game with in app-billing.
Now I am going to implement restore purchase function but I don't know how can I dot it.
I've made few days of googling and found many links to help it but they didn't work me now.
Please let me know how to do it programmatically.
Where can i find sample of restore purchase ?
I've implemented in app purchase already but not restore purchase.
I used Android Studio 1.5.1.
I've refered http://www.techotopia.com/index.php/An_Android_Studio_Google_Play_In-app_Billing_Tutorial to implement in app purchase.
Please help me :(
Thanks in advance.

If you are implemented the InApp Purchase using v3 you need not worry about the restore Purchase implementation. You can query the inventory and catch the existing Purchase information. Please check the implementation.
What I did here is I have already a purchase module. While I complete the purchase, I will send the information to our server. After relog in or come back to the application, the server will send the current user purchase info whether he is Purchased or not. if the server gives a negative result, I will check the query inventory that is there any existing purchase over there. For that, I am using the following code in the MainActivity onCreate().
mHelper = new IabHelper(this, base64EncodedPublicKey);
mHelper.enableDebugLogging(true);
Log.d(TAG, "Starting setup.");
mHelper.startSetup(new IabHelper.OnIabSetupFinishedListener() {
public void onIabSetupFinished(IabResult result) {
Log.d(TAG, "Setup finished.");
if (!result.isSuccess()) {
Log.e(TAG, "In App Set UP error:: Please check gmail account settings/ Credit Card Info etc");
return;
}
if (mHelper == null) return;
mBroadcastReceiver = new IabBroadcastReceiver(MainActivity.this);
IntentFilter broadcastFilter = new IntentFilter(IabBroadcastReceiver.ACTION);
registerReceiver(mBroadcastReceiver, broadcastFilter);
Log.d(TAG, "Setup successful. Querying inventory.");
if (mSupplier.getmSubscriptionStatus() == 0) { // This is the Status given from Local Server 0- UnScubscribed User, 1- Subscribed User
mHelper.queryInventoryAsync(mGotInventoryListenerForPurchase);
}
}
});
In the Result, You can Identify the existing purchase information.
IabHelper.QueryInventoryFinishedListener mGotInventoryListenerForPurchase = new IabHelper.QueryInventoryFinishedListener() {
public void onQueryInventoryFinished(IabResult result, Inventory inventory) {
try {
Log.d(TAG, "Query inventory For Purchase finished.");
String payload = // Your developer payload
if (mHelper == null) return;
if (result.isFailure()) {
Log.v(TAG, "PURCHSE RESULT ERROR- NO PURCHASE AVAILABLE");
return;
}
Log.v(TAG, "Query inventory For Purchase was successful.");
if (mSkuDetailList == null || mSkuDetailList.isEmpty()) {
Log.v(TAG, "SKU INFO FROM LOCAL SERVER- UNABLE TO PURCHASE");
return;
}
Purchase premiumPurchase = null;
for (IabSkuDetailModel data : mSkuDetailList) {
// Filter the purchase info using SKU:::
premiumPurchase = inventory.getPurchase(data.getmPackageName());
if (premiumPurchase != null) {
break;
}
}
if (premiumPurchase == null) {
Log.v(TAG, "NO Available Purchase for this user");
return;
}
if (verifyDeveloperPayload(premiumPurchase)) {
Log.v(TAG, "Purchase is there already ::: developer payload is Matching:: This need to update Local Server: No need to purchase agian");
if (premiumPurchase.getSku().equalsIgnoreCase(mSelectedSku)) {
IabPurchaseUpdateReq request = new IabPurchaseUpdateReq();
request.setmPurchaseToken(premiumPurchase.getToken());
request.setmUserId("" + mSupplier.getmUserId());
request.setmPublicKey(IabConstants.IAB_RSA_PUBLIC_KEY);
request.setmSignature(premiumPurchase.getSignature());
request.setmSubscriptionId(premiumPurchase.getSku());
request.setmPurchaseObj(premiumPurchase.getOriginalJson());
//Update "result to local Server"
} else {
Log.v(TAG, "SKU mismatch ::: ");
}
} else {
Log.v(TAG, "Developer payload error:: Wrong Purchase");
}
} catch (Exception e) {
e.printStackTrace();
}
}
};

How to debug in-app billing on Android 4.1 and 4.2?

New to Android dev and I have this very annoying, and familiar problem.
Short version: how can I test my app on multiple physical devices w/o buying them? Specifically, I'm trying to test on 4.1 and 4.2 running devices. I can't use an emulator because this involves in-app billing.
Long version:
Today, I got a crash report from a user (android version = 4.2, on device = A1-811 (mango)).
The issue is: IAB helper is not set up. Can't perform operation: queryInventory . I tested the app on 4.3, 5.0, 5.1 and it's fine.
I KNOW that the actual crash happened because I wasn't quitting when I was checking for (!result.isSuccess()) in mhelper.startSetup().
My question is, how do I solve the underlying issue of IabHelper not being set up?! I don't have access to Android 4.2 device...
MY CODE:
IabHelper.OnIabPurchaseFinishedListener mPurchaseFinishedListener = new IabHelper.OnIabPurchaseFinishedListener () {
public void onIabPurchaseFinished (IabResult result, Purchase purchase) {
if (mHelper == null)
return;
if (result.isFailure ()) {
Log.d (PURCHASE_TAG, "Google's response is a failure.");
} else {
Log.d (PURCHASE_TAG, "Response is successful. purchase.getSKU = " + purchase.getSku ());
premium = true;
}
}
};
IabHelper.QueryInventoryFinishedListener mQueryFinishedListener = new IabHelper.QueryInventoryFinishedListener () {
public void onQueryInventoryFinished (IabResult result, Inventory inventory) {
Log.d (PURCHASE_TAG, "Processing Google's response.");
// Check if user has existing purchase.
if (result.isFailure ()) {
Log.d (PURCHASE_TAG, "Google's response is a failure. Response = ");
} else {
Log.d (PURCHASE_TAG, "Google's response is success! getPurchase() = " + inventory.getPurchase (THE_SKU));
if (inventory.getPurchase (THE_SKU) == null) {
premium = false;
} else {
premium = inventory.getPurchase (THE_SKU).getSku ().equals (THE_SKU);
}
}
// Show price if user is not premium, thank you note if the user is premium
if (premium == true) {
Log.d (PURCHASE_TAG, "3 premium = " + premium);
priceView.setText ("Thank you for the purchase!");
} else {
if (inventory != null) {
String pro_price = inventory.getSkuDetails (THE_SKU).getPrice ();
priceView.setText ("" + pro_price);
}
}
}
};
private void startPurchaseQuery () {
String base64EncodedPublicKey = "the key is generated ...";
mHelper = new IabHelper (this, base64EncodedPublicKey);
Log.d (PURCHASE_TAG, "Purchase query started.");
mHelper.startSetup (new IabHelper.OnIabSetupFinishedListener () {
public void onIabSetupFinished (IabResult result) {
Log.d (PURCHASE_TAG, "IabHelper Setup successful. Querying inventory.");
if (!result.isSuccess ()) {
Log.d (PURCHASE_TAG, "Error with IabHelper setup.");
return;
}
if (mHelper == null) return;
// IAB is fully set up. Now, let's get an inventory of stuff we own.
// Build the SKU list
List<String> additionalSkuList;
additionalSkuList = new ArrayList<String> ();
additionalSkuList.add (THE_SKU);
// Make the query
mHelper.queryInventoryAsync (true, additionalSkuList, mQueryFinishedListener);
Log.d (PURCHASE_TAG, "Query finished. Premium status = " + premium);
}
});
}
#Override
protected void onActivityResult (int requestCode, int resultCode, Intent data) {
Log.d (PURCHASE_TAG, "onActivityResult(" + requestCode + "," + resultCode + "," + data);
// Pass on the activity result to the helper for handling
if (!mHelper.handleActivityResult (requestCode, resultCode, data)) {
// not handled, so handle it ourselves (here's where you'd
// perform any handling of activity results not related to in-app
// billing...
super.onActivityResult (requestCode, resultCode, data);
} else {
Log.d (PURCHASE_TAG, "onActivityResult handled by IABUtil.");
}
}
#Override
public void onDestroy () {
super.onDestroy ();
if (mHelper != null) mHelper.dispose ();
mHelper = null;
}

Answer from comments above
It's better to catch the error and patch own code first. Trying to reproduce exact issue why was IAB not set up may not be possible, because of all kinds of modifications user can do on his device (could be bug with specific version of distro user is running, which is almost impossible to find out, or similar). As you suggested, using Analytics to find out how many users have this issue is good approach.
To answer original question, you can create Alpha or Beta versions in Developer Console and invite users with specific versions of Android you'd like to target into testing group. This was you could test issues and crashes directly from Dev. Console even when not directly being owner of the device.

Android In-app Purchase V3 Error: Authentication is required

I am implementing Google In-app Purchase V3 and followed all steps stated over here as well in official documentation here. I have uploaded my app in Google Playstore for Alpha Testing and I have downloaded that from playstore URL into my real device but it giving me error
Error
Authentication is required. You need to sign into your Google Account.
My code for In-app purchase is here:
public class BuyPointsFragment extends Fragment
//In app Billing variable start
// Debug tag, for logging
static final String TAG = "com.myApp";
// Does the user have the premium upgrade?
boolean mIsPremium = false;
// Does the user have an active subscription to the infinite gas plan?
boolean mSubscribedToInfiniteGas = false;
// SKUs for our products: the premium upgrade (non-consumable) and gas
// (consumable)
static final String SKU_PREMIUM = "premium";
static final String SKU_GAS = "gas";
// SKU for our subscription (infinite gas)
static final String SKU_INFINITE_GAS = "infinite_gas";
// (arbitrary) request code for the purchase flow
static final int RC_REQUEST = 10001;
// Graphics for the gas gauge
static int[] TANK_RES_IDS = {};
// How many units (1/4 tank is our unit) fill in the tank.
static final int TANK_MAX = 4;
// Current amount of gas in tank, in units
int mTank;
// The helper object
IabHelper mHelper;
//In app billing variable end
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
//inapp load game data
loadData();
String base64EncodedPublicKey = "Base64Key from publisher account";
// Some sanity checks to see if the developer (that's you!) really
// followed the
// instructions to run this sample (don't put these checks on your app!)
if (base64EncodedPublicKey.contains("CONSTRUCT_YOUR")) {
throw new RuntimeException(
"Please put your app's public key in MainActivity.java. See README.");
}
if (getActivity().getPackageName().startsWith("com.myApp.activity")) {
throw new RuntimeException(
"Please change the sample's package name! See README.");
}
// Create the helper, passing it our context and the public key to
// verify signatures with
Log.d(TAG, "Creating IAB helper.");
mHelper = new IabHelper(getActivity(), 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.
complain(getString(R.string.problem_setting_inapp_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);
}
});
//In app billing code end here
}
//In app billing methods start here
public void inappCall(){
setWaitScreen(true);
Log.d(TAG, "Launching purchase flow for gas.");
/*
* 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 = "";
mHelper.launchPurchaseFlow(getActivity(), SKU_GAS, RC_REQUEST,
mPurchaseFinishedListener, payload);
}
// updates UI to reflect model
public void updateUi() {
// update the car color to reflect premium status or lack thereof
// ((ImageView)findViewById(R.id.free_or_premium)).setImageResource(mIsPremium
// ? R.drawable.premium : R.drawable.free);
// "Upgrade" button is only visible if the user is not premium
// findViewById(R.id.upgrade_button).setVisibility(mIsPremium ?
// View.GONE : View.VISIBLE);
// "Get infinite gas" button is only visible if the user is not
// subscribed yet
// (R.id.infinite_gas_button).setVisibility(mSubscribedToInfiniteGas ?
// View.GONE : View.VISIBLE);
// update gas gauge to reflect tank status
if (mSubscribedToInfiniteGas) {
// ((ImageView)findViewById(R.id.gas_gauge)).setImageResource(R.drawable.gas_inf);
} else {
int index = mTank >= TANK_RES_IDS.length ? TANK_RES_IDS.length - 1
: mTank;
// ((ImageView)findViewById(R.id.gas_gauge)).setImageResource(TANK_RES_IDS[index]);
}
}
// Enables or disables the "please wait" screen.
void setWaitScreen(boolean set) {
// findViewById(R.id.screen_main).setVisibility(set ? View.GONE :
// View.VISIBLE);
// findViewById(R.id.screen_wait).setVisibility(set ? View.VISIBLE :
// View.GONE);
}
void complain(String message) {
Log.e(TAG, "**** TrivialDrive Error: " + message);
alert("Error: " + message);
}
void alert(String message) {
AlertDialog.Builder bld = new AlertDialog.Builder(getActivity());
bld.setMessage(message);
bld.setNeutralButton("OK", null);
Log.d(TAG, "Showing alert dialog: " + message);
bld.create().show();
}
void saveData() {
/*
* WARNING: on a real application, we recommend you save data in a
* secure way to prevent tampering. For simplicity in this sample, we
* simply store the data using a SharedPreferences.
*/
SharedPreferences.Editor spe = getActivity().getPreferences(getActivity().MODE_PRIVATE).edit();
spe.putInt("tank", mTank);
spe.commit();
Log.d(TAG, "Saved data: tank = " + String.valueOf(mTank));
}
void loadData() {
SharedPreferences sp = getActivity().getPreferences(getActivity().MODE_PRIVATE);
mTank = sp.getInt("tank", 2);
Log.d(TAG, "Loaded data: tank = " + String.valueOf(mTank));
}
// We're being destroyed. It's important to dispose of the helper here!
#Override
public void onDestroy() {
super.onDestroy();
// very important:
Log.d(TAG, "Destroying helper.");
if (mHelper != null) {
mHelper.dispose();
mHelper = null;
}
}
// 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()) {
complain(getString(R.string.failed_to_query_inventory) + result);
return;
}
Log.d(TAG, "Query inventory was successful.");
/*
* Check for items we own. Notice that for each purchase, we check
* the developer payload to see if it's correct! See
* verifyDeveloperPayload().
*/
// Do we have the premium upgrade?
Purchase premiumPurchase = inventory.getPurchase(SKU_PREMIUM);
mIsPremium = (premiumPurchase != null && verifyDeveloperPayload(premiumPurchase));
Log.d(TAG, "User is " + (mIsPremium ? "PREMIUM" : "NOT PREMIUM"));
// Do we have the infinite gas plan?
Purchase infiniteGasPurchase = inventory
.getPurchase(SKU_INFINITE_GAS);
mSubscribedToInfiniteGas = (infiniteGasPurchase != null && verifyDeveloperPayload(infiniteGasPurchase));
Log.d(TAG, "User "
+ (mSubscribedToInfiniteGas ? "HAS" : "DOES NOT HAVE")
+ " infinite gas subscription.");
if (mSubscribedToInfiniteGas)
mTank = TANK_MAX;
// Check for gas delivery -- if we own gas, we should fill up the
// tank immediately
Purchase gasPurchase = inventory.getPurchase(SKU_GAS);
if (gasPurchase != null && verifyDeveloperPayload(gasPurchase)) {
Log.d(TAG, "We have gas. Consuming it.");
mHelper.consumeAsync(inventory.getPurchase(SKU_GAS),
mConsumeFinishedListener);
return;
}
updateUi();
setWaitScreen(false);
Log.d(TAG, "Initial inventory query finished; enabling main UI.");
}
};
/** Verifies the developer payload of a purchase. */
boolean verifyDeveloperPayload(Purchase p) {
String payload = p.getDeveloperPayload();
/*
* TODO: verify that the developer payload of the purchase is correct.
* It will be the same one that you sent when initiating the purchase.
*
* WARNING: Locally generating a random string when starting a purchase
* and verifying it here might seem like a good approach, but this will
* fail in the case where the user purchases an item on one device and
* then uses your app on a different device, because on the other device
* you will not have access to the random string you originally
* generated.
*
* So a good developer payload has these characteristics:
*
* 1. If two different users purchase an item, the payload is different
* between them, so that one user's purchase can't be replayed to
* another user.
*
* 2. The payload must be such that you can verify it even when the app
* wasn't the one who initiated the purchase flow (so that items
* purchased by the user on one device work on other devices owned by
* the user).
*
* Using your own server to store and verify developer payloads across
* app installations is recommended.
*/
return true;
}
// 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()) {
complain(getString(R.string.error_purchase) + result);
setWaitScreen(false);
return;
}
if (!verifyDeveloperPayload(purchase)) {
complain(getString(R.string.error_purchase_authenitcity_failed));
setWaitScreen(false);
return;
}
Log.d(TAG, "Purchase successful.");
if (purchase.getSku().equals(SKU_GAS)) {
// bought 1/4 tank of gas. So consume it.
Log.d(TAG, "Purchase is gas. Starting gas consumption.");
mHelper.consumeAsync(purchase, mConsumeFinishedListener);
} else if (purchase.getSku().equals(SKU_PREMIUM)) {
// bought the premium upgrade!
Log.d(TAG, "Purchase is premium upgrade. Congratulating user.");
alert(getString(R.string.thank_you_updgraing_premium));
mIsPremium = true;
updateUi();
setWaitScreen(false);
} else if (purchase.getSku().equals(SKU_INFINITE_GAS)) {
// bought the infinite gas subscription
Log.d(TAG, "Infinite gas subscription purchased.");
alert("Thank you for subscribing to infinite gas!");
mSubscribedToInfiniteGas = true;
mTank = TANK_MAX;
updateUi();
setWaitScreen(false);
}
}
};
// Called when consumption is complete
IabHelper.OnConsumeFinishedListener mConsumeFinishedListener = new IabHelper.OnConsumeFinishedListener() {
public void onConsumeFinished(Purchase purchase, IabResult result) {
Log.d(TAG, "Consumption finished. Purchase: " + purchase
+ ", result: " + result);
// if we were disposed of in the meantime, quit.
if (mHelper == null)
return;
// We know this is the "gas" sku because it's the only one we
// consume,
// so we don't check which sku was consumed. If you have more than
// one
// sku, you probably should check...
if (result.isSuccess()) {
// successfully consumed, so we apply the effects of the item in
// our
// game world's logic, which in our case means filling the gas
// tank a bit
Log.d(TAG, "Consumption successful. Provisioning.");
mTank = mTank == TANK_MAX ? TANK_MAX : mTank + 1;
saveData();
alert("You filled 1/4 tank. Your tank is now "
+ String.valueOf(mTank) + "/4 full!");
} else {
complain("Error while consuming: " + result);
}
updateUi();
setWaitScreen(false);
Log.d(TAG, "End consumption flow.");
}
};
#Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
Log.d(TAG, "onActivityResult(" + requestCode + "," + resultCode + ","
+ data);
if (mHelper == null)
return;
// Pass on the activity result to the helper for handling
if (!mHelper.handleActivityResult(requestCode, resultCode, data)) {
// not handled, so handle it ourselves (here's where you'd
// perform any handling of activity results not related to in-app
// billing...
super.onActivityResult(requestCode, resultCode, data);
} else {
Log.d(TAG, "onActivityResult handled by IABUtil.");
}
}
//In app billing method end here
My products are Managed products in developer account In-app Products
EDIT:
When I use android.test.purchased as a SKU then it works fine and as I change my sku with my product_id then it giving me Error Authentication is required. You need to sign into your Google Account.

Please make sure your product id on playstore for in app purchase which is "test_product" you should use the same sku in your code. And if you change the sku from your application, then all that possible sku names must exists on PlayStore as in-app Products. I once run into this problem and the reason was my SKU item was not exists on Google Playstore in-app products i just add it on Playstore and it was resolved.

Android IAB Error - Authentication required
It seems that you need to publish the APK. I stuck with this problem too.

It is a bit of a longshot, but your "Google Play store" app could be malfunctioning.
I have a report from a customer that he cannot make an In-App purchase and he is getting this same error. I also know that we are still getting purchases. So I don't think you necessarily configured anything wrong. IAB v3 could simply be malfunctioning with your "Google Play Store" app.
Try going to Settings open the Application manager and choose the "Google Play store" application in the list, and click on "Uninstall updates" button which appears there. Next try to do the purchase again. If your old Google Play application supports In-App billing v3 it will work. If it doesn't, try to update the "Google Play store" app again, perhaps you will get a newer/different version of the store app and you will be able to make the purchase.
As an alternative you can try and configure a second test device with a different Google account... or ask a friend to join a beta test group and make a test purchase.
I am not really happy with IAB v3. It feels a little clunky. V2 had fewer features but felt solid.

In-app billing error: Unable to buy item, Error response: 7:Item Already Owned

I am new in developing app using In-app billing,I had implmented it but some
times its giving me the following error
In-app billing error: Unable to buy item, Error response: 7:Item Already Owned
give me solution on it

You need to consume an item before buying it again..
IabHelper mHelper = new IabHelper(ACTIVITY, base64EncodedPublicKey);
#Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
// Pass on the activity result to the helper for handling
if (!mHelper.handleActivityResult(requestCode, resultCode, data)) {
super.onActivityResult(requestCode, resultCode, data);
}
else {
Log.d(TAG, "onActivityResult handled by IABUtil.");
}
}

As an example project given in Android Developer site
Named TrivialDrive we can consume purchased item as follow...
// Check for gas delivery -- if we own gas, we should fill up the tank immediately
Purchase gasPurchase = inventory.getPurchase(SKU_GAS);
if (gasPurchase != null && verifyDeveloperPayload(gasPurchase)) {
Log.d(TAG, "We have gas. Consuming it.");
mHelper.consumeAsync(inventory.getPurchase(SKU_GAS), mConsumeFinishedListener);
return;
}
// Called when consumption is complete
IabHelper.OnConsumeFinishedListener mConsumeFinishedListener = new IabHelper.OnConsumeFinishedListener() {
public void onConsumeFinished(Purchase purchase, IabResult result) {
Log.d(TAG, "Consumption finished. Purchase: " + purchase + ", result: " + result);
// if we were disposed of in the meantime, quit.
if (mHelper == null) return;
// We know this is the "gas" sku because it's the only one we consume,
// so we don't check which sku was consumed. If you have more than one
// sku, you probably should check...
if (result.isSuccess()) {
// successfully consumed, so we apply the effects of the item in our
// game world's logic, which in our case means filling the gas tank a bit
Log.d(TAG, "Consumption successful. Provisioning.");
mTank = mTank == TANK_MAX ? TANK_MAX : mTank + 1;
saveData();
alert("You filled 1/4 tank. Your tank is now " + String.valueOf(mTank) + "/4 full!");
}
else {
complain("Error while consuming: " + result);
}
updateUi();
setWaitScreen(false);
Log.d(TAG, "End consumption flow.");
}
};
Hope!!! It help You. You can go through this example project.