Leveraging PayPal Billing APIs

PayPal is a popular eCommerce service that facilitates financial transactions between somewhat trusted parties. X.commerce (http://www.x.com) is an eCommerce initiative that combines the eBay technologies such as PayPal services into a suite of products that are accessible via libraries. They publish a set of Mobile Payment Libraries that can be used to integrate PayPal functionality into your Android applications. You can download the libraries at their website (see the direct link in the “References and More Information” section at the end of this chapter). We recommend reading over the Mobile Payment Libraries—Getting Started Guide for Android documentation. The library documentation is available online, as well as developer forums and a test sandbox for development purposes.