Play Billing Library Integration

Version: 1.0.7

This library simplifies the process of integrating Google Play Billing into your Android applications, supporting both in-app purchases and subscriptions.

Features

In-App Purchases (One-Time Products): Easily handle the purchase of consumable and non-consumable products.

Subscription Management: Manage subscriptions with flexible billing periods (weekly, monthly, yearly).

Product Restoration: Restore previously purchased products and subscriptions.

In-App Messaging: Enable in-app messaging for subscription status updates and other in-app billing interactions.

Installation

Add the following dependency to your project-level build.gradle:

gradle

Copy code

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


implementation'com.github.muhammad-ahmed-lib:PlayBillingLibrary:1.0.7'

Setup

Initialize Billing Service

In your MainActivity, initialize the BillingService in the onCreate method:

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private val mBillingService by lazy {

BillingService.getInstance(this)

}

override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) binding = ActivityMainBinding.inflate(layoutInflater) setContentView(binding.root)

// Initialize the Billing Service
mBillingService.initializeBilling(object : BillingStateListener {
    override fun onConnected(isConnected: Boolean, billingResult: BillingResult) {
        // Call methods once billing is connected
        restoreSubscription()
        getProductsDetails()
        purchaseProduct()
        subscribeProduct()
        enableInAppMessaging()
    }

    override fun onDisconnected(isConnected: Boolean, responseCode: Int) {
        Log.d(TAG, "onDisconnected: $responseCode")
    }
})

}

Retrieve Product Details

Fetch the details of one-time products and subscription plans:

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private fun getProductsDetails() {

mBillingService.getOneTimeProductDetails("lifetime", object : BillingProductDetailsListener {
  
    override fun onProductDetailsRetrieved(billingResult: BillingResult, productDetails: List<ProductDetails>) {
        Log.d(TAG, "One-time Product Details: $productDetails")
    }

    override fun onProductDetailsRetrievalFailed(errorCode: Int, errorMessage: String) {
        Log.e(TAG, "Failed to retrieve product details: $errorMessage")
    }
})

mBillingService.getSubscriptionDetails(listOf("weekly", "monthly"), object : BillingProductDetailsListener {
  
    override fun onProductDetailsRetrieved(billingResult: BillingResult, productDetails: List<ProductDetails>) {
        Log.d(TAG, "Subscription Details: $productDetails")
    }

    override fun onProductDetailsRetrievalFailed(errorCode: Int, errorMessage: String) {
        Log.e(TAG, "Failed to retrieve subscription details: $errorMessage")
    }
})

}

Handle Purchases

Purchase a one-time product or a subscription:

Copy code // Purchase a one-time product

private fun purchaseProduct() {

mBillingService.purchaseOneTimeProduct(this, "lifeTime", object : BillingLaunchFlowListener {
    override fun onBillingFailed(error: String, responseCode: Int) {
        Log.e(TAG, "Purchase failed: $error")
    }

    override fun onProductPurchasedSuccessfully(billingResult: BillingResult, purchases: List<Purchase>?) {
        Log.d(TAG, "Product purchased: $purchases")
    }
})

}

// Purchase a subscription private fun subscribeProduct() {

mBillingService.purchaseSubscription(this, "monthly", object : BillingLaunchFlowListener {

    override fun onProductPurchasedSuccessfully(billingResult: BillingResult, purchases: List<Purchase>?) {
        Log.d(TAG, "Subscription purchased: $purchases")
    }
})

} Restore Purchases

Restore previous in-app purchases or subscriptions:

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private fun restoreSubscription() {

mBillingService.restoreSubscription(object : BillingPurchaseListener {
 
    override fun onRestoreBillingFinished(isAppPurchased: Boolean, productDetails: MutableList<Purchase>) {
        Log.d(TAG, "Restored subscription: $productDetails")
    }

    override fun onRestoreBillingFailed(billingError: Int) {
        Log.e(TAG, "Failed to restore subscriptions")
    }
})

}

Enable In-App Messaging

Activate in-app messaging for subscription updates:

Copy code private fun enableInAppMessaging() {

mBillingService.enableInAppMessaging(this, object : InAppBillingMessaging {
 
    override fun onSubscriptionStatusUpdated(inAppMessageResult: InAppMessageResult) {
        Log.d(TAG, "Subscription status updated: $inAppMessageResult")
    }
})

}

License

This library is available for use under the MIT License.

For feedback, issues, or feature requests, feel free to contact:

Muhammad Ahmed

Email: [email protected]

WhatsApp: +923091370220