You need to follow the below steps to build an in-app payment flow using Smart2Pay.SDK.Payment, a class designed to make building your app’s checkout flow as easy as possible.

1. Download the smart2pay.aar file located at: https://github.com/Smart2Pay/SDK-Android-Release/tree/master/releases.
2. Place the .aar file in the app/libs folder.
3. Add this to your app Gradle file and click on the Sync Now button.

   dependencies {
       api files('libs/smart2pay.aar')
   }

Now that the SDK is in the app, you can actually use it in the code. Continue with setting up the SDK:

• Nuvei Android SDK Instructions for Alipay and Wechat (Java);
• Nuvei Android SDK Instructions for Alipay and Wechat (Kotlin);
• Nuvei Android SDK Instructions for Credit Cards (Java).