| ConnectivityManager.OnNetworkActiveListener | Callback for use with registerDefaultNetworkActiveListener(ConnectivityManager.OnNetworkActiveListener)
 to find out when the system default network has gone in to a high power state.  | 
          
| UrlQuerySanitizer.ValueSanitizer | A functor used to sanitize a single query value. | 
| ConnectivityManager | Class that answers queries about the state of network connectivity. | 
| ConnectivityManager.NetworkCallback | Base class for NetworkRequest callbacks. | 
| Credentials | A class for representing UNIX credentials passed via ancillary data on UNIX domain sockets. | 
| DhcpInfo | A simple object for retrieving the results of a DHCP request. | 
| IpPrefix | This class represents an IP prefix, i.e., a contiguous block of IP addresses aligned on a power of two boundary (also known as an "IP subnet"). | 
| LinkAddress | Identifies an IP address on a network link. | 
| LinkProperties | Describes the properties of a network link. | 
| LocalServerSocket | non-standard class for creating inbound UNIX-domain socket on the Android platform, this is created in the Linux non-filesystem namespace. | 
| LocalSocket | Creates a (non-server) socket in the UNIX-domain namespace. | 
| LocalSocketAddress | A UNIX-domain (AF_LOCAL) socket address. | 
| MailTo | MailTo URL parser This class parses a mailto scheme URL and then can be queried for the parsed parameters. | 
| Network | Identifies a Network.  | 
          
| NetworkCapabilities | This class represents the capabilities of a network. | 
| NetworkInfo | Describes the status of a network interface. | 
| NetworkRequest | Defines a request for a network, made through NetworkRequest.Builder and used
 to request a network via requestNetwork(NetworkRequest, ConnectivityManager.NetworkCallback) or listen for changes
 via registerNetworkCallback(NetworkRequest, ConnectivityManager.NetworkCallback).  | 
          
| NetworkRequest.Builder | Builder used to create NetworkRequest objects.  | 
          
| Proxy | A convenience class for accessing the user and default proxy settings. | 
| ProxyInfo | Describes a proxy configuration. | 
| RouteInfo | Represents a network route. | 
| SSLCertificateSocketFactory | SSLSocketFactory implementation with several extra features:
 
  | 
          
| SSLSessionCache | File-based cache of established SSL sessions. | 
| TrafficStats | Class that provides network traffic statistics. | 
| Uri | Immutable URI reference. | 
| Uri.Builder | Helper class for building or manipulating URI references. | 
| UrlQuerySanitizer | Sanitizes the Query portion of a URL. | 
| UrlQuerySanitizer.IllegalCharacterValueSanitizer | Sanitize values based on which characters they contain. | 
| UrlQuerySanitizer.ParameterValuePair | A simple tuple that holds parameter-value pairs. | 
| VpnService | VpnService is a base class for applications to extend and build their own VPN solutions. | 
| VpnService.Builder | Helper class to create a VPN interface. | 
| LocalSocketAddress.Namespace | The namespace that this address exists in. | 
| NetworkInfo.DetailedState | The fine-grained state of a network connection. | 
| NetworkInfo.State | Coarse-grained network state. | 
| ParseException | Thrown when parsing a URL fails. |