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title: Overview description: Overview of the TransactBridge Android Drop-in SDK for fast, secure payment integration. The TransactBridge Android Drop-in SDK lets you add a complete, secure payment experience to your app with minimal code. It supports card and UPI payments, handles UI, validation, and security, and provides a smooth user experience.

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Integration Methods

You can integrate the SDK in three ways:
  • Direct AAR file: Build or download the AAR and add it to your app’s libs/ directory.
  • Maven Local: Publish the SDK to your local Maven repository and add it as a dependency.
  • Maven Central: (Coming soon) Add the SDK as a dependency from Maven Central.
See Quick Start for step-by-step instructions for each method.

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What does the Drop-in SDK provide?

The Drop-in SDK offers:
  • Pre-built payment sheet (UPI, Terms & Conditions)
  • PCI-compliant, secure payment handling
  • UPI app listing and deep linking
  • Customizable theming
  • Device and network security checks
  • Simple callback-based integration

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How the Drop-in SDK Works

  1. Add the SDK to your project (AAR or Maven)
  2. Initialize the SDK with your publishable key and endpoints
  3. Add the Terms & Conditions view to your layout
  4. Launch the payment sheet with a config object
  5. Handle payment results via callback

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Key Concepts

  • PaymentSDK: Entry point for all payment operations. Handles initialization and launching the payment sheet.
  • PaymentConfig: Holds all parameters for a payment (session, token, T&C, etc.).
  • PaymentResultCallback: Interface for handling payment results (success, failure, cancel).
  • TermsAndConditionsView: UI component for user consent.
  • UPI App Listing: Utility to list and launch UPI apps for payment.