AppAuth for Android is a client SDK for communicating with OAuth 2.0 and OpenID Connect providers. It strives to directly map the requests and responses of those specifications while following the idiomatic style of the implementation language. In addition to mapping the raw protocol flows, convenience methods are available to assist with common tasks like performing an action with fresh tokens.
The library follows the best practices set out in RFC 8252 – OAuth 2.0 for Native Apps, including using Custom Tabs for authorization requests. For this reason, WebView is explicitly not supported due to usability and security reasons.