play-billing-samples | Samples for Google Play In-app Billing

The following code is about Google in-app payment based office sample code.

I have to test it in a real mobile phone because it' hard to test Google in-app payment in Android Studio emulator.

Unfortunately, the app crashed in real mobile phone when I open the FragmentBuy, I hardly get the error information about the crash.

I checked my code again and agin, I guest there are two place which cause crash, one is private fun processPurchases(purchasesResult: Set) , another is private fun acknowledgeNonConsumablePurchasesAsync(nonConsumables: List).

1: They lanuch Toast.makeTex in in asynchronous thread, is it reason of crash?

2: Which one is correct between Billing.getInstance(requireActivity(), getString(R.string.skuRegisterApp)) and Billing.getInstance(requireContext), getString(R.string.skuRegisterApp)) ?

3: Is there other problems with my code ?

FragmentBuy.kt

The Code A is from the project play-billing-samples, you can see here.

I think that "SELECT * FROM gold_status LIMIT 1" maybe return no record, I don't know whether fun getGoldStatus(): LiveData is correct statement, I think it should be Code B, right?

Code A

The Code A is from the project play-billing-samples, you can see it.

I don't know why the author design localCacheBillingClient as lateinit, it cause the code is little complex, if (::localCacheBillingClient.isInitialized == false) {...} are invoked many times.

I think Code B can works well, right?

Code A

Google published a brand new version to handle the payments in Android but after searching quite a while I cannot find a single example or tutorial from someone who succeeded implementing it.

The documentation is very short and provides only a part of the necessary code: https://developer.android.com/google/play/billing/billing_library_overview

The only sample provided is made with Kotlin: https://github.com/android/play-billing-samples

Seems like they forgot about Java developers...

Does anyone know a tutorial online or succeeded to implement it? My current code is far from working to be published yet.

The following Code A is from the project play-billing-samples.

Can I use is null instead of isInitialized in Kotlin? just like Code B

Code A

I am struggling for days to implement android user subscription into android. I am using the google dev tutorial for Java in-app purchases:

https://github.com/android/play-billing-samples/tree/master/ClassyTaxiJava

At the last section, I need to deploy backend Server as described here:

https://github.com/android/play-billing-samples/tree/master/ClassyTaxiServer

What I did:

1. cloned the server files and folders in the tutorial into my PC
2. Opened CMD and directed to the folder
3. logged into firebase by firebase login --> OK
4. added the firebase project by firebase use -add --> OK
5. initiated a function command firebase functions:config:set app.package_name="com.mypackage.app" --> OK
6. deploy firebase --> ERROR

Error is as below:

I've followed all the steps in here to get the "Classy Taxi: Google Play Billing Subscriptions Android App Java Sample" running, however on the last step I'm very confused, it´s not clear to me as to how I´m supposed to deploy the back-end, here are the steps:

These are steps to build the backend server code located here

1. Make sure you have installed Node.js, npm, and Firebase CLI.
2. Run npm install to install dependencies.
3. Configure Cloud Functions for Firebase with your Android app and subscription products:

On upgrading the billingclient to 2.1.0:

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