OAuthenticationManager is not working as expected in ArcGIS Runtime SDK for Xamarin Forms.

Zusätzliche Informationen

Workaround

User-based authentication

To support user-based authentication with OAuth, the recommended approach is OAuth Authorization Code. In this case the TokenAuthenticationType must be set to OAuthAuthorizationCode. Refer to ArcGIS Developers: ArcGIS Identity for more information.

Example:

var serverInfo = new ServerInfo(new Uri("https://www.arcgis.com/sharing/rest"))

{

  TokenAuthenticationType = TokenAuthenticationType.OAuthAuthorizationCode,

  OAuthClientInfo = new OAuthClientInfo("...", null)

};

Application-based authentication

• To support application-based authentication with OAuth, it is necessary to use the Client Credential approach with a client ID and client secret. In this case the TokenAuthenticationType must be set to OAuthClientCredentials. Refer to ArcGIS Developers: Application credentials for more information.

Example: 

var serverInfo = new ServerInfo(new Uri("https://www.arcgis.com/sharing/rest"))

{

  TokenAuthenticationType = TokenAuthenticationType.OAuthClientCredentials,

  OAuthClientInfo = new OAuthClientInfo("...", null, "...")

};

Notes:

• It is not necessary to issue separate REST requests for tokens, instead the ArcGIS Runtime API supports this process automatically via the AuthenticationManager. 
• If a manual refresh of the token is required, application code should call OAuthTokenCredential.RefreshAsync().
• Various properties of the credential can be accessed via API properties on OAuthTokenCredential, such as UserName

Schritte zur Reproduzierung