ANR and UninitializedPropertyAccessException when configuring RevenueCat Purchases in Application

I recently integrated RevenueCat into my Android (Java) app and I’m facing both:

1. Crash: UninitializedPropertyAccessException – singleton not initialized

2. ANR: Slow operations on the main thread during Purchases.configure()  

RevenueCat Initialization

I initialize RevenueCat in my Application class:

@Override public void onCreate() { super.onCreate(); Purchases.setLogLevel(LogLevel.DEBUG); Purchases.configure( new PurchasesConfiguration.Builder( getApplicationContext(), "goog_PtfrQdxywvuyHZAeNNLzJalKKIt" ).build() ); }

Usage in Premium Screen

In my PremiumScreen Activity onCreate():

Purchases.getSharedInstance().getOfferings(new ReceiveOfferingsCallback() { @Override public void onReceived(@NonNull Offerings offerings) { // Handle offerings } @Override public void onError(@NonNull PurchasesError error) { // Handle error } });

Crash Details

kotlin.UninitializedPropertyAccessException: There is no singleton instance. Make sure you configure Purchases before trying to get the default instance. More info here: https://errors.rev.cat/configuring-sdk Caused by: com.revenuecat.purchases.Purchases$Companion.getSharedInstance com.revenuecat.purchases.Purchases.getSharedInstance com.faceswap.ai.art.avatar.generator.activities.PremiumScreenCat.onCreate

This happens even though Purchases.configure() is called in Application.onCreate() and navigation to the Premium screen only happens after initialization.

ANR Details (Main Thread Blocked)

Initial ANR stack trace:

ANR triggered by slow operations in main thread com.revenuecat.purchases.PurchasesFactory.createPurchases com.revenuecat.purchases.Purchases.configure com.faceswap.ai.art.avatar.generator.AppopenAD.MyAppOpen.onCreate

Attempted Fix

I tried moving the initialization logic out of onCreate() and running it after app startup (background flow), but I still get ANRs.

Updated ANR stack trace:

ANR triggered by slow operations in main thread com.revenuecat.purchases.subscriberattributes.caching.SubscriberAttributesCache.cleanUpSubscriberAttributeCache com.revenuecat.purchases.identity.IdentityManager.configure com.revenuecat.purchases.PurchasesOrchestrator.<init> com.revenuecat.purchases.PurchasesFactory.createPurchases com.revenuecat.purchases.Purchases.configure com.faceswap.ai.art.avatar.generator.AppopenAD.MyAppOpen.initAfterStartup

Key Points

• App is Java-based

• RevenueCat SDK is initialized once

• Premium screen is opened after initialization

• Still seeing:

  • getSharedInstance() crash

  • ANR caused by Purchases.configure() and subscriber attributes cleanup

• Moving initialization off onCreate() did not resolve ANR

Questions

1. Is Purchases.configure() expected to perform heavy operations on the main thread?

2. Is there a recommended best practice to avoid ANR during SDK initialization?

3. Can getSharedInstance() be called safely if initialization is still in progress?

4. Should initialization be done in a specific lifecycle point or with a specific threading model?

Any guidance or best practices would be greatly appreciated.