PayPal Android SDK with Flutter: Integrate PayPal Checkout Using Platform Channels Flutter does not need a Dart package for every native Android SDK. When an application depends on an Android-only SDK, Flutter can communicate with Kotlin through platform channels . This is especially useful for payment SDKs. In this tutorial, we'll demonstrate the architecture for integrating the PayPal Android SDK through Braintree's PayPal module into a Flutter Android application. Important...