Develop Reference

PayPal Here Android SDK Error - BadConfiguration: Cannot proceed with this merchant account

I'm trying to integrate the PayPal Here swipers into a Xamarin Android app. Everything is fine until I try and give my credentials to the SDK. Specifically, the line containing the call to PayPalHereSDK.SetCredentials
public void InitializeSdk( Context context, string serverName, string accessToken, string refreshUrl, string expires, IPayPalHereSdkWrapperCallback listener ) {
PayPalHereSDK.Init( context, serverName );
PayPalHereSDK.RegisterAuthenticationListener( this );
PayPalHereSDK.CardReaderManager.RegisterCardReaderConnectionListener( this );
if ( !string.IsNullOrEmpty( accessToken ) ) {
var credentials = new OAuthCredentials( accessToken, refreshUrl, expires );
PayPalHereSDK.SetCredentials( credentials, new SetAccessTokenResponseHandler( listener ) );
}
}
My SetAccessTokenResponseHandler class implements the Com.PayPal.Merchant.Sdk.Domain.IDefaultResponseHandler interface. As described above, the OnError function is called when call the PayPalHereSDK.SetCredentials function. I'm given the error code "BadConfiguration" and the message "Cannot proceed with this merchant account. ready"
I've searched Google high and low and, I believe, scoured SO pretty thoroughly. I can't seem to overcome the error, so I'm asking for help!

I think the paypal email is not verified properly. Please go through the merchant onboarding guide document to get more details regarding making the merchant eligible.
https://github.com/paypal/paypal-here-sdk-android-distribution/blob/master/docs/Merchant%20Onboarding%20Guide.pdf
Hope this helps. Cheers.

I'm not sure what exactly the issue was, but I ended up deleting the Sandbox App in my PayPal dev portal and creating a new one. Everything works now. head scratch
I resorted to this because, while trying to follow Sundar's suggestion, I started getting an "invalid scope" error. I had received them before and KNEW I had it fixed ( and no code had changed ). When I deleted/recreated the app, that error went away. Frustrating, but that's what worked!

Java based Google App Engine, Android and authentication oauth2

Authentication and app engine, there is a lot to be read about it, but a lot seems to be outdated!
Even the google pages https://developers.google.com/appengine/docs/java/endpoints/consume_android#making-authenticated-calls
Here, they talk about 'GoogleAccountCredential.usingAudience', but nowadays, you should use GoogleAuthUtil (as far as I know, please correct me if I'm wrong).
I am trying to set up an app engine as a backend to my Android app (and in future, my iOS app).
I am using Android Studio, used the 'new module' and chose app engine with cloud messaging there.
I created a simple endpoint, and have a function there, here is some code:
public class ReviewEndpoint {
// Make sure to add this endpoint to your web.xml file if this is a web application.
private static final Logger LOG = Logger.getLogger(ReviewEndpoint.class.getName());
/**
* This method gets the <code>Review</code> object associated with the specified <code>id</code>.
* #param id The id of the object to be returned.
* #return The <code>Review</code> associated with <code>id</code>.
*/
#ApiMethod(name = "getReview")
public Review getReview(#Named("id") Long id) {
// Implement this function
Review r = new Review();
r.setData("test!");
As you can see, this is nicely generated by Android Studio. I implemented some stuf like creating the 'review' object and return it at the end.
On the Android side, I can do this:
ReviewEndpoint.Builder b = new ReviewEndpoint.Builder(AndroidHttp.newCompatibleTransport(), new AndroidJsonFactory(), null);
ReviewEndpoint ep = b.build();
Review review = ep.getReview(1L).execute();
data = review.getData();
and yes, I get 'test!' :)
Now, I want to have this authenticated. I want to know which user wrote what, so I thought I am going to use GMail account and Facebook later.
Here I'm stuck. I am able to get a token from the user on Android:
token = GoogleAuthUtil.getToken(MainScreenActivity.this, mAccount.name, "oauth2:https://www.googleapis.com/auth/plus.me https://www.googleapis.com/auth/userinfo.profile");
then you are able to add this token as credential to the request:
Credential cr = new Credential(BearerToken.authorizationHeaderAccessMethod()).setAccessToken(token);
ReviewEndpoint.Builder b = new ReviewEndpoint.Builder(AndroidHttp.newCompatibleTransport(), new AndroidJsonFactory(), cr);
Then in the app engine I tried to get the user info, but how?
Will it be supplied as 'bearer'? How do I get this bearer token? Should I then do API request to get the data on the server?
this does not work:
OAuthService service = OAuthServiceFactory.getOAuthService();
try {
User user = service.getCurrentUser();
can anyone give me a heads up?

So finally, today, I found out how to do it! I had questions on Stackoverflow on this before and never had an answer, but these to sites gave me the answer:
https://developers.google.com/appengine/docs/java/endpoints/auth
https://developers.google.com/appengine/docs/java/endpoints/consume_android
The first shows what needs to be done on the app engine side. The second page will tell you how to get the credentials. I was quite close. I am not sure if the adjusting of the build.gradle file mentioned in the second link is necessary. What I added to the App Engine:
#Api(name = "reviewEndpoint", version = "v1", ...<<some more stuff here >>
scopes = {Constants.EMAIL_SCOPE},
clientIds = {Constants.WEB_CLIENT_ID, Constants.ANDROID_CLIENT_ID},
audiences = {Constants.ANDROID_AUDIENCE})
and then get the credentials:
// Initialize the scope using the client ID you got from the Console.
final String scope = "server:client_id:" + Constants.WEB_CLIENT_ID;
credential = GoogleAccountCredential.usingAudience(activity,scope);
You have to add the e-mail address of the user:
credential.setSelectedAccountName("some-mail-address#gmail.com");
you can get the e-mail address using the account picker (also example shown when you follow the link)
and next. you do a call to the endpoint, using the credential, I think Play Services will validate the user, because if I use an e-mail that is not logged in on the device, it will not work. The following code will throw an GoogleAuthIOException :
ReviewEndpoint.Builder b = new ReviewEndpoint.Builder(
AndroidHttp.newCompatibleTransport(),
new AndroidJsonFactory(), id_token);
ReviewEndpoint ep = b.build();
Review review;
review = ep.getReview(1L).execute();
for testing, I've put the e-mail address I get at the server side as a string in the review object, and there it gave me the e-mail address instead of the user object being null. Ow! I forgot to tell you, you need a user argument on the app engine side. Even though you do not see the 'user' argument in the 'getReview' call above, it will be added by App Engine.
So this is how my getReview looks now:
#ApiMethod(name = "getReview")
public Review getReview(#Named("id") Long id, User user) {
// Implement this function
Review r = new Review();
r.setData("user == " + (user == null ? "NULL " : user.toString()));
Hope this will help someone

What is a Page ID for the place field in Post Facebook Graph API?

I am having trouble while trying to post a message on the current end-user Facebook wall with my Android Application.
So far :
The user is logged in with all the required permissions, especially
the publish_actions permission ;
I am using the last version of Facebook SDK 3.x & Graph API v2 as of May 2014
Post to wall works now as of EDIT 2, but there are issues with
privacy settings : post cannot be seen by anyone not even the
recipient who is tagged in the post ! See EDIT 2 for more details
Here is the documentation for posting a message on the user wall :
https://developers.facebook.com/docs/graph-api/reference/v2.0/user/feed (go to Publishing)
Regarding the message that needs to be posted on the user' wall, I need to tag some friends that were previously selected by the user.
But to use the tag field I need to use the place field.
The documentation says :
Name: tags
Comma-separated list of user IDs of people tagged in this post. You cannot specify this field without also specifying a place.
Type: csv[string]
Name: place
Page ID of a location associated with this post.
Type: string
What is location page ID ? How do I get it ?
Oddly enough, in my specefic case, I am offering the possibilty to the user to share is upcoming travel on Facebook.
More oddly enough, this travel is defined by dates and a destination (name of destination + latitude & longitude). The user has the possibility to also share this travel to his friends that are located in his travel's destination hence the need to tag his friends to the wall post.
[EDIT 1]
After looking into #Tobi solutions, I managed to post a message on the end-user wall (in my case me, since I am the developper).
So far : the message is correctly displayed with a friend tagged (a dummy account I use for tests purpouses) and there is also the place : Paris, France.
Using the following search query (thanks #Tobi) search?q=Paris,France&type=place I can get the ID of Paris, France.
Since I did not code the part to retrieve the Place ID it put it manually in the code for the sake of testing the feature first.
[END OF EDIT 1]
[EDIT 2]
I noticed I forgot to add the part with the privacy values to my args Bundle. But it did not change a damn thing : my post is only visible to me alone.
Going to my Facebook wall, here is what I get :
Hovering the public parameters of the posts (a padlock icon) says "All tagged persons".
Clicking on the icon shows the list of settings with only "Only me" selected.
Why "only me" even though I specifically said me + my dummy account in the request parameters ?
Even weirder : changing the property of the publication parameters to "customized" with my dummy account does not change a damn thing as well. Just why ? Facebook is really getting on my nerve...
For the rest, the message content is correctly displayed and the related place is the good one. At least a got that correctly. But still, I just don't get the rest ...
[END OF EDIT 2]
So here is the updated code :
if (this.session != null && this.session.isOpened()) {
final Bundle args = new Bundle();
if (this.selectedContacts.isEmpty() == false) {
args.putString("message", message);
args.putString("place", "170558129707208"); //manually added Paris, France ID
String tags = "";
//here I made some modifications regarding the tags so that is built correctly
for (int it = 0; it < this.selectedContacts.size(); it++) {
final String name = this.selectedContacts.get(it).toString();
final String friendID = String.valueOf(getIdFromName(name)); // returns an int
if (it == this.selectedContacts.size())
tags += friendID;
else
tags += friendID + ",";
}
// Forgot to add privacy values to bundle !
final JSONObject privacyValues = new JSONObject(); //not android JSON, but JSON-Simple lib
privacyValues.put("value", "CUSTOM");
String allow = this.currentUser.getId() + "," + tags;
privacyValues.put("allow", allow); // to limit the visibility of this post
args.putString("privacy", privacyValues.toJSONString()); //forgot that one...
final Request shareTravelRequest = new Request(this.session, this.currentUser.getID() + "/feed",
args, HttpMethod.POST, new Request.Callback() {
public final void onCompleted(final Response response) {
//TODO
}
}
);
final Response response = shareTravelRequest.executeAndWait();
if (response.getError() == null) // in this case, no error occurred
return true;
else {
this.lastErrorMessage = response.getError().getErrorMessage();
Log.e("Something went wrong while posting Facebook message", this.lastErrorMessage);
Log.e("Error type is", response.getError().getErrorType());
Log.e("Error code is", String.valueOf(response.getError().getErrorCode()));
return false;
}
}
}
Unfortunately I must have mistaken somewhere because although the post does appear on my Facebook wall with my dummy account tagged and with the correct link to the place, my dummy account cannot see the post.
I tried creating manually the same post on my Facebook wall by using the following settings :
First I supplied a message
Second I supplied a place
Third I tagged my dummy account
Four I choose who can see this post : me and my dummy account
And finally, I post the message.
In this case, my dummy account sees the post both on its wall and on my wall.
So I would like to know what parameters I must get wrong because there is not much parameters and I just don't see why.
Thanks !

You can either use the Search and use the type place (https://developers.facebook.com/docs/graph-api/using-graph-api/v2.0#search), or, if you have positioning date, use an FQL query on the place table (https://developers.facebook.com/docs/reference/fql/place/) as described here: Facebook places: order results by distance

Use two test accounts made via Facebook Developer App settings and not a dummy account that breaks TOS. Since you request publish_actions you probably didn't submit the app for review. Unless your dummy account is a developer/tester in roles as well (which is breaking the TOS again) then your dummy account will not be able to see the post.
Only developers and testers of an unpublished application can see posts made by that application.

Android + App engine: user.getUserID() is null in endpoint

I have an Android application with GAE server. I tried to authenticate the user as described on developers.google.com, I added the user parameter to the endpoint methods etc. I get a User which is not null, but this method getUserId() returns null. It is similar to this, rather old problem:
Function User.getUserId() in Cloud endpoint api returns null for a user object that is not null
But I still don't know how to work around it. How do you handle this error? Have you ever encountered it?
In android client here's what I did (its simplified) :
credentials = GoogleAccountCredential.usingAudience(getApplicationContext(), "server:client_id:" + WEB_CLIENT_ID);
credentials.setSelectedAccountName(accountName);
WarriorEntityEndpoint.Builder endpointBuilder = new WarriorEntityEndpoint.Builder(AndroidHttp.newCompatibleTransport(), new GsonFactory(), credentials);
warriorEntityEndpoint = endpointBuilder.build();
new AsyncTask<Void, Void, Void>() {
#Override
protected Void doInBackground(Void... params) {
// TODO Auto-generated method stub
try {
warriorEntityEndpoint.getWarrior().execute();
} catch (Exception e) {
}
return null;
}
}.execute();
And on GAE:
#Api(name = "warriorEntityEndpoint", namespace = #ApiNamespace(ownerDomain = "szpyt.com", ownerName = "szpyt.com", packagePath = "mmorpg.monsters"),
version = "version1",
scopes = {"https://www.googleapis.com/auth/userinfo.email", "https://www.googleapis.com/auth/userinfo.profile"},
clientIds = {Constants.ANDROID_CLIENT_ID, Constants.WEB_CLIENT_ID},
audiences = {Constants.ANDROID_AUDIENCE})
public class WarriorEntityEndpoint {
private static final Logger log = Logger.getLogger(WarriorEntityEndpoint.class.getName());
#ApiMethod(name = "getWarrior")
public WarriorEntity getWarrior(User user) throws OAuthRequestException, IOException {
log.log(Level.SEVERE, "this gives correct email: " + user.getEmail());
log.log(Level.SEVERE, "this is null: " + user.getUserId());
I have also another very important question: is this user authenticated, if getMail() gives me correct account, but getUserId() gives null? I read that user object should be null if it was not authenticated but I am not sure any more...
I'm using App engine SDK 1.8.7. I'm testing on a real device and backend deployed to GAE.

I asked the same question a while ago and got an answer. See link:
Function User.getUserId() in Cloud endpoint api returns null for a user object that is not null
The cause is a bug on appengine.

I guess there is no good solution for it right now. I store e-mail as a normal property and remove it from default fetch group, I use long as a primary key (generated by AppEngine) and I query the entity by the e-mail property. I don't like my solution, I'll accept ( and implement :) ) a better one if anyone can provide.

This is a known issue which has been filed with google, I've attached the issue link below.
There are two workarounds (1) save the user and read back from the store, if it refers to a valid account the user id will be populated (this sucks because you pay the saving / loading / deletion cost for each API access that is authenticated even if it is tiny, and obviously some performance cost) and (2) you could use the google+ ID but that is NOT the same as the user id.
This is extremely frustrating and there is currently no ETA as they are working on some fundamental issues with the auth design as far as I understand.
Please, vote for that issue by starring it. You can find all the information here
https://code.google.com/p/googleappengine/issues/detail?can=2&start=0&num=100&q=&colspec=ID%20Type%20Component%20Status%20Stars%20Summary%20Language%20Priority%20Owner%20Log&groupby=&sort=&id=8848
And here is the current formally approved workaround [(1) above], which you can also find in the link above, but for ease it's here: How can I determine a user_id based on an email address in App Engine?
For workaround (2) mentioned above, you can look at the first link, and go to post #39.

In-app-billing on android (purchase confirmation, json string)

I'm having problems with coding payments.
This is a web game and here's how I would like the payments to work.
You got to a site and click a button(buy). You are redirected to a site that will send the information of a purchase to the server adding the bought item to your account. Before that happens we have a WebViewClient that checks all the urls. If he find an url that is meant for purchases he will send the purchase request. Now if we will get a message back from android market that it was successful he will proceed with the redirect.
I'm quite new to this and just can't grasp the concept of these payments. I wrote my code using the dungeon example. I tried to adjust it to my needs. I would be grateful is someone could point me in the right direction. Atm I'm trying to figure out how to get the response of a successful purchase. Assuming that the rest of my code is ok it should be working (I hope).
I have in my project files BillingReciver.java, BillingSerivce.java, PurchaseObserver.java, ResponseHandler.java, Consts.java and Security.java that were in the example. If need be I can provice the code of these but there is a lot of it, so I'm hoping someone who already seen the example will be able to help.
After some research and consulting with some people I found what I need:
/**
* This is called when Android Market sends information about a purchase state
* change. The signedData parameter is a plaintext JSON string that is
* signed by the server with the developer's private key. The signature
* for the signed data is passed in the signature parameter.
* #param context the context
* #param signedData the (unencrypted) JSON string
* #param signature the signature for the signedData
*/
private void purchaseStateChanged(Context context, String signedData, String signature) {
Intent intent = new Intent(Consts.ACTION_PURCHASE_STATE_CHANGED);
intent.setClass(context, BillingService.class);
intent.putExtra(Consts.INAPP_SIGNED_DATA, signedData);
intent.putExtra(Consts.INAPP_SIGNATURE, signature);
context.startService(intent);
}
I need to get the data out of the JSON string that my app will get from android market. Anyone have an idea how to do that?

On Nov 17 '11 at 21:56 #Grzegorz 'Gatz' Siennicki wrote:
I need to get the data out of the JSON string that my app will get
from android market. Anyone have an idea how to do that?
Look at the verifyPurchase() method in Security.java module in the sample:
JSONObject jElement = jTransactionsArray.getJSONObject(i);
int response = jElement.getInt("purchaseState");
PurchaseState purchaseState = PurchaseState.valueOf(response);
String productId = jElement.getString("productId");
String packageName = jElement.getString("packageName");
long purchaseTime = jElement.getLong("purchaseTime");
String orderId = jElement.optString("orderId", "");
String notifyId = null;
if (jElement.has("notificationId")) {
notifyId = jElement.getString("notificationId");
}
String developerPayload = jElement.optString("developerPayload", null);
Note that since the JSON is generated by the Android Market, those const-strings that specify the field names in the JSONObject.getXXX() methods are "hard coded" (i.e. you can't really name them anything you want).

From the android documentation on In App Billing:
...when the requested transaction changes state (for example, the purchase is successfully charged to a credit card or the user cancels the purchase), the Android Market application sends an IN_APP_NOTIFY broadcast intent. This message contains a notification ID, which you can use to retrieve the transaction details for the REQUEST_PURCHASE request.
Got that from here.