Android - Present Paywall Builder paywalls in Observer mode

If you've customized a paywall using the Paywall Builder, you don't need to worry about rendering it in your mobile app code to display it to the user. Such a paywall contains both what should be shown within the paywall and how it should be shown.

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This section refers to Observer mode only. If you do not work in Observer mode, refer to the Android - Present Paywall Builder paywalls topic instead.

1. Implement the AdaptyUiObserverModeHandler. The AdaptyUiObserverModeHandler's callback (onPurchaseInitiated) informs you when the user initiates a purchase. You can trigger your custom purchase flow in response to this callback like this:

   KotlinJava

   val observerModeHandler =
   AdaptyUiObserverModeHandler { product, paywall, paywallView, onStartPurchase, onFinishPurchase ->
       onStartPurchase()
       yourBillingClient.makePurchase(
           product,
           onSuccess = { purchase ->
               onFinishPurchase()
               //handle success
           },
           onError = {
               onFinishPurchase()
               //handle error
           },
           onCancel = {
               onFinishPurchase()
               //handle cancel
           }
       )
   }
   

   AdaptyUiObserverModeHandler observerModeHandler = (product, paywall, paywallView, onStartPurchase, onFinishPurchase) -> {
       onStartPurchase.invoke();
       yourBillingClient.makePurchase(
           product,
           purchase -> {
               onFinishPurchase.invoke();
               //handle success
           },
           error -> {
               onFinishPurchase.invoke();
               //handle error
           },
           () -> { //cancellation
               onFinishPurchase.invoke();
               //handle cancel
           }
       );
   };
   

   Also, remember to invoke these callbacks to AdaptyUI. This is necessary for proper paywall behavior, such as showing the loader, among other things:

   Callback in Kotlin	Callback in Java	Description
   onStartPurchase()	onStartPurchase.invoke()	The callback should be invoked to notify AdaptyUI that the purchase is started.
   onFinishPurchase()	onFinishPurchase.invoke()	The callback should be invoked to notify AdaptyUI that the purchase is finished successfully or not, or the purchase is canceled.

2. In order to display the visual paywall, you must first initialize it. To do this, call the method AdaptyUI.getPaywallView() or create the AdaptyPaywallView directly:

   KotlinJavaXML

   val paywallView = AdaptyUI.getPaywallView(
       activity,
       viewConfiguration,
       products,
       AdaptyPaywallInsets.of(topInset, bottomInset),
       eventListener,
       personalizedOfferResolver,
       tagResolver,
       observerModeHandler,
   )
   
   //======= OR =======
   
   val paywallView =
     	AdaptyPaywallView(activity) // or retrieve it from xml
   ...
   with(paywallView) {
       setEventListener(eventListener)
       setObserverModeHandler(observerModeHandler)
       showPaywall(
           viewConfiguration,
           products,
           AdaptyPaywallInsets.of(topInset, bottomInset),
           personalizedOfferResolver,
           tagResolver,
       )
   }
   

   AdaptyPaywallView paywallView = AdaptyUI.getPaywallView(
           activity,
           viewConfiguration,
           products,
           AdaptyPaywallInsets.of(topInset, bottomInset),
           eventListener,
           personalizedOfferResolver,
           tagResolver,
           observerModeHandler
   );
   
   //======= OR =======
   
   AdaptyPaywallView paywallView =
     new AdaptyPaywallView(activity); //add to the view hierarchy if needed, or you receive it from xml
   ...
   paywallView.setEventListener(eventListener);
   paywallView.setObserverModeHandler(observerModeHandler);
   paywallView.showPaywall(viewConfiguration, products, AdaptyPaywallInsets.of(topInset, bottomInset), personalizedOfferResolver);
   

   <com.adapty.ui.AdaptyPaywallView xmlns:android="http://schemas.android.com/apk/res/android"
       android:layout_width="match_parent"
       android:layout_height="match_parent" />
   

   After the view has been successfully created, you can add it to the view hierarchy and display it.

   Request parameters:

   Parameter	Presence	Description
   Products	optional	Provide an array of AdaptyPaywallProduct to optimize the display timing of products on the screen. If null is passed, AdaptyUI will automatically fetch the required products.
   ViewConfiguration	required	Supply an AdaptyViewConfiguration object containing visual details of the paywall. Use the Adapty.getViewConfiguration(paywall) method to load it. Refer to Fetch the visual configuration of paywall topic for more details.
   Insets	required	Define an AdaptyPaywallInsets object containing information about the area overlapped by system bars, creating vertical margins for content. If neither the status bar nor the navigation bar overlaps the AdaptyPaywallView, pass AdaptyPaywallInsets.NONE. For fullscreen mode where system bars overlap part of your UI, obtain insets as shown under the table.
   EventListener	optional	Provide an AdaptyUiEventListener to observe paywall events. Extending AdaptyUiDefaultEventListener is recommended for ease of use. Refer to Handling paywall events topic for more details.
   PersonalizedOfferResolver	optional	To indicate personalized pricing (read more ), implement AdaptyUiPersonalizedOfferResolver and pass your own logic that maps AdaptyPaywallProduct to true if the product's price is personalized, otherwise false.
   TagResolver	optional	Use AdaptyUiTagResolver to resolve custom tags within the paywall text. This resolver takes a tag parameter and resolves it to a corresponding string. Refer to Custom tags in paywall builder topic for more details.
   ObserverModeHandler	required for Observer mode	The AdaptyUiObserverModeHandler you've implemented in the previous step.
   variationId	required	The string identifier of the variation. You can get it using variationId property of the AdaptyPaywall object.
   transaction	required	For iOS, StoreKit1: an SKPaymentTransaction object. For iOS, StoreKit 2: Transaction object. For Android: String identifier (purchase.getOrderId()) of the purchase, where the purchase is an instance of the billing library Purchase class.

   For fullscreen mode where system bars overlap part of your UI, obtain insets in the following way:

   KotlinJava

   import androidx.core.graphics.Insets
   import androidx.core.view.ViewCompat
   import androidx.core.view.WindowInsetsCompat
   
   //create extension function
   fun View.onReceiveSystemBarsInsets(action: (insets: Insets) -> Unit) {
       ViewCompat.setOnApplyWindowInsetsListener(this) { _, insets ->
           val systemBarInsets = insets.getInsets(WindowInsetsCompat.Type.systemBars())
   
           ViewCompat.setOnApplyWindowInsetsListener(this, null)
           action(systemBarInsets)
           insets
       }
   }
   
   //and then use it with the view
   paywallView.onReceiveSystemBarsInsets { insets ->
       val paywallInsets = AdaptyPaywallInsets.of(insets.top, insets.bottom)
       paywallView.setEventListener(eventListener)
       paywallView.setObserverModeHandler(observerModeHandler)
       paywallView.showPaywall(viewConfig, products, paywallInsets, personalizedOfferResolver, tagResolver)
   }
   
   

   import androidx.core.graphics.Insets;
   import androidx.core.view.ViewCompat;
   import androidx.core.view.WindowInsetsCompat;
   
   ...
   
   ViewCompat.setOnApplyWindowInsetsListener(paywallView, (view, insets) -> {
       Insets systemBarInsets = insets.getInsets(WindowInsetsCompat.Type.systemBars());
       ViewCompat.setOnApplyWindowInsetsListener(paywallView, null);
     
       AdaptyPaywallInsets paywallInsets =
         			AdaptyPaywallInsets.of(systemBarInsets.top, systemBarInsets.bottom);
       paywallView.setEventListener(eventListener);
       paywallView.setObserverModeHandler(observerModeHandler);
       paywallView.showPaywall(viewConfiguration, products, paywallInsets, personalizedOfferResolver, tagResolver);
               
       return insets;
   });
   

   Returns:

   Object	Description
   AdaptyPaywallView	object, representing the requested paywall screen.

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Don't forget to Associate paywalls to purchase transactions. Otherwise, Adapty will not determine the source paywall of the purchase.