android-inapp-billing-v3
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anjlab
Billing Library version 3 or newer.
Reminder: Starting on August 2, 2021, all new apps must use Billing Library version 3 or newer. By November 1, 2021, all updates to existing apps must use Billing Library version 3 or newer. Learn more.
I have made an Android Library to manage Google Play Billing, In App Purchases and Subscriptions with just a few lines of code. Check it out and be sure to star the project if you liked my contribution :)
https://github.com/akshaaatt/Google-IAP
IMO, this library isn't needed anymore. Google Play billing v2 offered a very low-level AIDL, but v3 offers a Kotlin/Java API. The AIDL API required a lot of boilerplate code for handling raw data and making requests. The Kotlin/Java API offered by v3 takes care of that, which is also one of the pain points that this library addressed for v2. Unlike v2, v3 also queries Play Store's cache on querying purchases. A major chunk of this library was dedicated to maintaining this cache.
The v3 library doesn't address verifying purchases. You can copy-paste the Security class for that. Your licenseKey is the public key for verifying purchases. productId, purchaseData and dataSignature are returned by Purchase#getSku(), Purchase#getOriginalJson() and Purchase#getSignature() respectively.
https://github.com/anjlab/android-inapp-billing-v3/blob/23b702219e7449e99ba94ace21cbe2cdb6eb6e8d/library/src/main/java/com/anjlab/android/iab/v3/BillingProcessor.java#L173-L177
https://github.com/anjlab/android-inapp-billing-v3/blob/23b702219e7449e99ba94ace21cbe2cdb6eb6e8d/library/src/main/java/com/anjlab/android/iab/v3/BillingProcessor.java#L1009-L1024
On a side note, you are now required to either acknowledge or consume all purchases. You also need to handle pending purchases that may transition to the purchased state while the user is away from your app.
After trying to make this project compatible with v3, I gave up and using only the v3 itself, It is not complicate to use, you can follow this sample https://medium.com/@programtown/how-to-make-in-app-purchase-in-android-using-google-play-billing-library-updated-library-3-0-1-72e0b1fd43d5 or more advance sample of Google ClassyTaxiJava https://github.com/android/play-billing-samples/blob/main/ClassyTaxiJava/app/src/main/java/com/sample/android/classytaxijava/billing/BillingClientLifecycle.java , change the BillingClient.SkuType.SUBS to BillingClient.SkuType.INAPP for use with non subscription
thanks to @dzungpv i was able to update my library to 3.0.1, still testing, will comment after testing.
Android Billing Library v-4+
Source Code :- https://github.com/Mahadev-code/Android-inApp-Billing
Source code also tested on Google Play store
Demo App :- https://play.google.com/store/apps/details?id=com.shiv.shambhu
