Demonstrates how to use the In App Purchase Android (IAP) Plugin.
There‘s a significant amount of setup required for testing in-app purchases successfully, including registering new app IDs and store entries to use for testing in the Play Developer Console. Google Play requires developers to configure an app with in-app items for purchase to call their in-app-purchase APIs. The Google Play Store has extensive documentation on how to do this, and we’ve also included a high level guide below.
Create a new app in the Play Developer Console (PDC).
Sign up for a merchant's account in the PDC.
Create IAPs in the PDC available for purchase in the app. The example assumes the following SKU IDs exist:
consumable: A managed product.upgrade: A managed product.subscription_silver: A lower level subscription.subscription_gold: A higher level subscription.Make sure that all of the products are set to ACTIVE.
Update APP_ID in example/android/app/build.gradle to match your package ID in the PDC.
Create an example/android/keystore.properties file with all your signing information. keystore.example.properties exists as an example to follow. It's impossible to use any of the BillingClient APIs from an unsigned APK. See here and here for more information.
Build a signed apk. flutter build apk will work for this, the gradle files in this project have been configured to sign even debug builds.
Upload the signed APK from step 6 to the PDC, and publish that to the alpha test channel. Add your test account as an approved tester. The BillingClient APIs won't work unless the app has been fully published to the alpha channel and is being used by an authorized test account. See here for more info.
Sign in to the test device with the test account from step #7. Then use flutter run to install the app to the device and test like normal.