[FIXED] Samples for the AndroidPublisher (V3) Google API Client Library for Java

Issue

I am upgrading AndroidPublisher library from v1 to v3 for my secure backend server. AndroidPublisher library (v3) will allows me to do server side purchase validation and acknowledgement for in-app purchases and subscription securely.

Existing code for v1 is not compatible anymore. The v3 library looks better but I could not find any sample code for:

1. Build client credential using client JSON.
2. Get & Acknowledge Purchases using PurchaseToken.

Maven setting:

<project>
  <dependencies>
    <dependency>
      <groupId>com.google.apis</groupId>
      <artifactId>google-api-services-androidpublisher</artifactId>
      <version>v3-rev103-1.25.0</version>
    </dependency>
    <dependency>
        <groupId>com.google.api-client</groupId>
        <artifactId>google-api-client</artifactId>
        <version>1.30.2</version>
    </dependency>
  </dependencies>
</project>

API documentation: https://developers.google.com/android-publisher/api-ref/purchases/products/get

Looking for a sample like this: https://developers.google.com/api-client-library/java/google-api-java-client/samples

Any short sample code would be a great help.

Solution

Add following dependencies

compile "com.google.apis:google-api-services-androidpublisher:v3-rev103-1.25.0"
compile "com.google.auth:google-auth-library-oauth2-http:0.17.1"

Then enable Google Developer Play Api library from Google Cloud Console here

In credentials Create service account key with role Pub/Sub Admin and save json file

In Google developers Console here. In Settings >> Developer Account >> API Access link your app.

Then in code do following to get subscription info.

GoogleCredentials credentials = GoogleCredentials.fromStream(new FileInputStream("<service-account-key-file>.json")).createScoped(AndroidPublisherScopes.ANDROIDPUBLISHER);

AndroidPublisher pub = new AndroidPublisher.Builder(
        GoogleNetHttpTransport.newTrustedTransport(),
        JacksonFactory.getDefaultInstance(),
        new HttpCredentialsAdapter(credentials)
).setApplicationName("<app-name>").build();
SubscriptionPurchase purchase = pub.purchases().subscriptions().get(
        "<app-package>",
        "<subscription-id>",
        "<purchase-token>"
).execute();
println(purchase);

Note: if you get this error:

The current user has insufficient permissions to perform the requested operation.

Then try again after one day because after enable google play developer api and creating service account key from google console you need to wait 24 to 48 hours and also do following

From Google Play Console go to (with admin access):

1. Setting (Left Panel) Developer Account (Left Panel) Users & permissions (Left Panel)
2. Click on the Invite New User button.
3. Enter the service account email (the same you have in the json file you are using and that google generated when you created the service account)
4. Select Administrator in the Role DropDown menu.
5. Click on SEND INVITATION

Answered By - Sabeeh
Answer Checked By - David Goodson (JavaFixing Volunteer)