BillingLib: A Kotlin repository from Insider77

Using Billing Library in your Android application

Add it in your root build.gradle at the end of repositories:

allprojects {
    repositories {
        maven { url 'https://jitpack.io' }
    }
}

Add this in your build.gradle

implementation 'com.github.ahmadidrees347:BillingLib:version'

Do not forget to add internet permission in manifest if already not present

<uses-permission android:name="android.permission.INTERNET" />

Create an object IapConnector :

private var iapConnector: IapConnector? = null

To check status of billing connection:

private var isBillingClientConnected = false

Initialize IapConnector obj:

iapConnector = IapConnector(
    context = this,
    nonConsumableKeys = listOf("android.test.purchased"),
    consumableKeys = listOf("android.test.purchased"),
    subscriptionKeys = listOf("sku_monthly"),
    enableLogging = true
)

Now Add listeners:

iapConnector?.addBillingClientConnectionListener(object : BillingClientConnectionListener {
    override fun onConnected(status: Boolean, billingResponseCode: Int) {
        isBillingClientConnected = status
    }
})

For One Time Purchase:

iapConnector?.addPurchaseListener(object : PurchaseServiceListener {
    override fun onEmptyPurchasedList() {
        //No purchase
    }

    override fun onPricesUpdated(iapKeyPrices: Map<String, DataWrappers.SkuDetails>) {
        val currency = iapKeyPrices["your_sub_id"]?.priceCurrencyCode ?: ""
        val price = iapKeyPrices["your_sub_id"]?.price ?: ""
        //"$currency $price"

    }

    override fun onProductPurchased(purchaseInfo: DataWrappers.PurchaseInfo) {
        // will be triggered whenever subscription succeeded
    }

    override fun onProductRestored(purchaseInfo: DataWrappers.PurchaseInfo) {
        // will be triggered when user purchase that        
    }
})

For Subscription:

iapConnector?.addSubscriptionListener(object : SubscriptionServiceListener {
    override fun onSubscriptionRestored(purchaseInfo: DataWrappers.PurchaseInfo) {

    }

    override fun onSubscriptionPurchased(purchaseInfo: DataWrappers.PurchaseInfo) {

    }

    override fun onEmptySubscriptionList() {
    }

    override fun onPricesUpdated(iapKeyPrices: Map<String, DataWrappers.SkuDetails>) {

    }

})

For Subscription Call this method:

if (isBillingClientConnected) {
    iapConnector?.purchase(this, "android.test.purchased")
}