Android Saripaar is a simple, feature-rich and powerful rule-based UI form validation library for Android. It is the SIMPLEST UI validation library available for Android. Built on top of Apache Commons Validator, a validation framework with proven track record on the web, desktop and mobile platforms. Declarative style validation using Annotations. Extensible, now allows Custom Annotations. Synchronous and Asynchronous validations, you don't have to worry about threading. Supports both BURST and IMMEDIATE modes. Works with Stock Android Widgets, no custom view dependencies. Isolates validation logic using rules.