Infinum Android Talks #18 - In-app billing by Ivan Marić
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This document outlines the process of implementing in-app billing for Android applications using Google Play services. It includes various monetization models such as freemium, subscriptions, and ads, and provides detailed technical guidance on setting up billing services. Additionally, it covers best practices for testing, security, and managing subscriptions, while emphasizing the importance of protecting content against piracy.
Infinum Android Talks #18 - In-app billing by Ivan Marić
- 1. We're an independent design & development agency.
- 3. Average people earn money doing things they don’t like. Rich people follow their passion. - STEVE SIEBOLD
- 4. GOOGLE PLAY
- 5. MONETIZE Premium - simple and convient Freemium - durable and consumable digital goods Subscription - continuing revenue stream AdMob Ads - easy way to earn revenue
- 6. Total revenue by model
- 7. https://support.google.com/googleplay/android-developer/table/ 3539140?hl=en&rd=1 MERCHANT ACCOUNT Google Play Developer Console - Financial reports Not supported in all countries
- 11. ANDROID MANIFEST <uses-permission android:name="com.android.vending.BILLING" /> Upload to Alpha/Beta channel
- 12. Intent serviceIntent = new Intent( “com.android.vending.billing.InAppBillingService.BIND"); serviceIntent.setPackage(“com.android.vending”); context.bindService(serviceIntent, serviceConnection, Context.BIND_AUTO_CREATE); context.unbindService(serviceConnection); Service connection
- 13. private ServiceConnection serviceConnection = new ServiceConnection() { @Override public void onServiceConnected(ComponentName name, IBinder service) { billingService = IInAppBillingService.Stub.asInterface(service); int r = billingService.isBillingSupported(3, packageName, itemType); if (r == 0) { // Billing supported return; } } }; Service connection
- 14. private ServiceConnection serviceConnection = new ServiceConnection() { @Override public void onServiceConnected(ComponentName name, IBinder service) { billingService = IInAppBillingService.Stub.asInterface(service); int r = billingService.isBillingSupported(3, packageName, "inapp"); if (r == 0) { // Billing supported return; } } }; Service connection
- 15. private ServiceConnection serviceConnection = new ServiceConnection() { @Override public void onServiceConnected(ComponentName name, IBinder service) { billingService = IInAppBillingService.Stub.asInterface(service); int r = billingService.isBillingSupported(5, packageName, "subs"); if (r == 0) { // Billing supported return; } } }; Service connection
- 16. Response
- 17. GET DETAILS Information about the item Localised Items are immutable
- 18. // Split the sku list in blocks of no more than 20 elements. Bundle querySkus = new Bundle(); querySkus.putStringArrayList("ITEM_ID_LIST", skuPartList); Bundle skuDetails = billingService.getSkuDetails( 3, packageName, itemType, querySkus);
- 19. Bundle skuDetails = billingService.getSkuDetails( 3, packageName, itemType, querySkus);
- 20. GET PURCHASES User owned items Use for restore
- 21. Bundle ownedItems = billingService.getPurchases( 3, packageName, itemType, continueToken);
- 22. BUY INTENT Get PendingIntent to launch the purchase flow Purchase flow is handle by Google Play Response for purchase order received in onActivityResult
- 23. Bundle buyIntent = billingService.getBuyIntent( 3, packageName, sku, itemType, payload); PendingIntent intent = buyIntent.getParcelable("BUY_INTENT"); activity.startIntentSenderForResult(intent.getIntentSender(), requestCode, new Intent(), 0, 0, 0);
- 24. Bundle buyIntent = billingService.getBuyIntentToReplaceSkus( 5, packageName, oldSku, sku, "subs", payload); PendingIntent intent = buyIntent.getParcelable("BUY_INTENT"); activity.startIntentSenderForResult(intent.getIntentSender(), requestCode, new Intent(), 0, 0, 0); Subscription upgrade/downgrade
- 26. CONSUME ITEM Purchased item is owned by the user forever Can not purchase an item more than once Remove item from the owner to purchase again
- 27. // Don’t call this on UI thread billingService.consumePurchase(3, packageName, token);
- 28. TESTING
- 29. STATIC TEST Used for testing response models Verify signatures android.test.purchased, android.test.canceled, android.test.refunded, android.test.item_unavailable
- 30. REAL TEST Setup test accounts in Google Developer Console Real purchase without money transaction All subscriptions last one day Missing orderId property
- 31. SECURITY
- 32. SIGNED RESPONSES Verify purchase JSON response Licence key as public key portion Best practice to do this on a server side
- 33. GOOGLE PLAY DEVELOPER API Use www.googleapis.com for checking purchase status Manage subscriptions
- 34. https://www.reddit.com/r/Piracy/comments/3eo8sj/ antipiracy_measures_on_android_custom_roms/ HACKER APPS Rooted devices Change the behaviour of the system and apps
- 35. PROTECT YOUR CONTENT Do not provide content with .apk Encrypt content with device specific key Recoverable data
- 36. DOCUMENTATION
- 37. http://developer.android.com/google/play/billing/index.html GOOGLE SERVICE Overview Version 3 API Security and Design Testing In-app Billing Administering In-app Billing
- 38. http://developer.android.com/training/in-app-billing/index.html TRAINING Preparing Your App Establishing Products for Sale Purchasing Products Testing Your App
- 39. WATCH OUT FOR Developer payload Calling consume request on Main thread Subscription downgrade/upgrade (v3 / v5) AIDL file (https://github.com/googlesamples/android-play-billing/issues/3) Limitations http://stackoverflow.com/questions/13717091/android-error-while- retrieving-information-from-server-rpcs-5aec-0-in-google
- 41. Any questions? IVAN.MARIC@INFINUM.CO IVAN MARIĆ Visit infinum.co or find us on social networks: infinum.co infinumco infinumco infinum