Installation

allprojects {  
	allprojects {
		repositories {
			...
			maven { url 'https://jitpack.io' }
		}
}
dependencies {
	implementation 'com.github.applogistdev:easybilling-android:Tag'
}

What is Consume and Acknowledge

https://developer.android.com/google/play/billing/billing_library_overview#acknowledge

Consume Example

Candy Crush Buy Candy Bomb $1

Purchase -> onPurchasesUpdated -> consumePurchase

You can buy again

Acknowledge Example

Candy Crush Remove Ads $5

Purchase -> onPurchasesUpdated -> acknowledgePurchase

You can't buy again

What is Developer Payload

https://developer.android.com/google/play/billing/billing_library_overview#attach_a_developer_payload

Some example: Developer Payload = User Email Address

Candy Crush Buy Candy Bomb $1 OR Candy Crush Remove Ads $5

Purchase -> onPurchasesUpdated -> consumePurchase(Developer Payload) OR acknowledgePurchase(Developer Payload)

override fun onInAppPurchases(purchases: List<Purchase>) {  
    Log.d(purchases[0].developerPayload)
}
OR
override fun onSubsPurchases(purchases: List<Purchase>) {  
    Log.d(purchases[0].developerPayload)
}

Flow

İnit ->

• onBillingInitialized() OR onBillingInitializedError()
  • onBillingInitializedError -> Finish
  • onBillingInitialized -> onInAppPurchases() AND onSubsPurchases()
    • onInAppPurchases -> returned all BillingClient.SkuType.INAPP
    • onSubsPurchases -> returned all BillingClient.SkuType.SUBS
• billingViewModel.purchase(Context, PRODUCT_ID(Google Play Store), BillingClient.SkuType.INAPP or BillingClient.SkuType.SUBS) -> onPurchasesUpdated (Only returns the items that were just now purchased or billed.)
• billingViewModel.consumePurchase(Purchase Token) -> onPurchaseConsumed()
• billingViewModel.acknowledgePurchase(Purchase Token, AcknowledgePurchaseResponseListener, Devloper Payload) -> https://developer.android.com/google/play/billing/billing_library_overview#acknowledge

Usage

billingViewModel = ViewModelProvider(this).get(EasyBillingViewModel::class.java)  
  
billingViewModel.billingListener = object : EasyBillingListener {  
  
    override fun onBillingInitialized() {  
        Log.d("onBillingInitialized")
    }  
  
    override fun onBillingInitializedError(errorCode: Int) {  
        Log.e("onBillingInitializedError", errorCode)  
    }  
  
    override fun onInAppPurchases(purchases: List<Purchase>) {  
        Log.d("onInAppPurchases")  
    }  
  
    override fun onSubsPurchases(purchases: List<Purchase>) {  
        Log.e("subsPurchases", purchases)  
    }  
  
    override fun onPurchasesUpdated(billingResult: BillingResult, purchases: List<Purchase>?) {  
        Log.e("onPurchasesUpdated")
    }  
  
    override fun onPurchaseConsumed(billingResult: BillingResult, purchaseToken: String) {  
		Log.e("onPurchaseConsumed")
    }  
}

Payment

billingViewModel.purchase(Context, IN_APP_PRODUCT_ID)

Test Payments

billingViewModel.testPurchased(Context)

billingViewModel.testPurchaseCanceled(Context)

billingViewModel.testPurchaseItemUnavailable(Context)

Get Items

override fun onBillingInitialized() {   
    billingViewModel.getSkuDetails(  
            arrayListOf(IN_APP_PRODUCT_ID),  
            BillingClient.SkuType.INAPP,  
            SkuDetailsResponseListener { billingResult, skuDetailsList ->  {
	            Log.d("getSkuDetails", skuDetailsList[0].price)
            }
  )  
}
or
if(billingViewModel.isBillingReady()){
    billingViewModel.getSkuDetails(  
            arrayListOf(IN_APP_PRODUCT_ID),  
            BillingClient.SkuType.INAPP,  
            SkuDetailsResponseListener { billingResult, skuDetailsList ->  {
	            Log.d("getSkuDetails", skuDetailsList[0].price)
            }
  )
}