Android APIs
Added in API level 1
package

org.apache.http.impl.auth

Interfaces

NTLMEngine Abstract NTLM authentication engine. 

Classes

AuthSchemeBase Abstract authentication scheme class that serves as a basis for all authentication schemes supported by HttpClient. 
BasicScheme

Basic authentication scheme as defined in RFC 2617. 

BasicSchemeFactory  
DigestScheme

Digest authentication scheme as defined in RFC 2617. 

DigestSchemeFactory  
NTLMScheme  
RFC2617Scheme Abstract authentication scheme class that lays foundation for all RFC 2617 compliant authetication schemes and provides capabilities common to all authentication schemes defined in RFC 2617. 

Exceptions

NTLMEngineException Signals NTLM protocol failure. 
UnsupportedDigestAlgorithmException Authentication credentials required to respond to a authentication challenge are invalid