Contact person: Upgrade Subscription Logic to 8.0.0

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Location: Deoghar, India

Budget: Recommended by industry experts

Time to start: As soon as possible

Project description:
"I need my existing Android app (written in Java) brought up to date with Google Play Billing Library 8.0.0. Right now the purchase flow is still on 7.1.1 in a single activity; everything else in the project should remain untouched. The subscription unlocks premium features and removes ads, so after the upgrade those entitlements must continue to trigger exactly as they do today.

Please work directly in the one activity that handles billing, refactor or migrate the calls to the new BillingClient APIs introduced in 8.x, and make sure the build is clean in Android Studio. No other libraries need altering. When finished, the app should compile, connect to Google Play’s test environment, complete a test purchase, and immediately hide ads and expose the premium feature set.

Deliverables
• Updated Java source for the billing activity, compatible with Billing Library 8.0.0
• Any additional helper classes or Gradle snippets strictly required for the migration
• A brief note outlining the test steps you used to confirm that ads disappear and premium features unlock after a successful purchase" (client-provided description)