android.net.wifi.p2p Kotlin |Java

Provides classes to create peer-to-peer (P2P) connections with Wi-Fi Direct.

Using these APIs, you can discover and connect to other devices when each device supports Wi-Fi Direct, then communicate over a speedy connection across distances much longer than a Bluetooth connection. The primary class you need to work with is WifiP2pManager, which you can acquire by calling getSystemService(WIFI_P2P_SERVICE). The WifiP2pManager includes APIs that allow you to:

Initialize your application for P2P connections by calling initialize()
Discover nearby devices by calling discoverPeers()
Start a P2P connection by calling connect()
And more

Several other interfaces and classes are necessary as well, such as:

The WifiP2pManager.ActionListener interface allows you to receive callbacks when an operation such as discovering peers or connecting to them succeeds or fails.
WifiP2pManager.PeerListListener interface allows you to receive information about discovered peers. The callback provides a WifiP2pDeviceList, from which you can retrieve a WifiP2pDevice object for each device within range and get information such as the device name, address, device type, the WPS configurations the device supports, and more.
The WifiP2pManager.GroupInfoListener interface allows you to receive information about a P2P group. The callback provides a WifiP2pGroup object, which provides group information such as the owner, the network name, and passphrase.
WifiP2pManager.ConnectionInfoListener interface allows you to receive information about the current connection. The callback provides a WifiP2pInfo object, which has information such as whether a group has been formed and who is the group owner.

In order to use the Wi-Fi P2P APIs, your app must request the following user permissions:

ACCESS_WIFI_STATE
CHANGE_WIFI_STATE
INTERNET (although your app doesn’t technically connect to the Internet, communicating to Wi-Fi Direct peers with standard java sockets requires Internet permission).

For example code, see the Wi-Fi Direct Demo sample application.

Note: Not all Android-powered devices support Wi-Fi Direct. If your application uses Wi-Fi Direct, declare so with a element in the manifest file:

<manifest …>

…

Interfaces
WifiP2pManager.ActionListener Interface for callback invocation on an application action
WifiP2pManager.ChannelListener Interface for callback invocation when framework channel is lost
WifiP2pManager.ConnectionInfoListener Interface for callback invocation when connection info is available
WifiP2pManager.DeviceInfoListener Interface for callback invocation when WifiP2pDevice is available in response to WifiP2pManager.requestDeviceInfo(android.net.wifi.p2p.WifiP2pManager.Channel, android.net.wifi.p2p.WifiP2pManager.DeviceInfoListener).
WifiP2pManager.DiscoveryStateListener Interface for callback invocation when p2p state is available in response to WifiP2pManager.requestDiscoveryState(WifiP2pManager.Channel, WifiP2pManager.DiscoveryStateListener).
WifiP2pManager.DnsSdServiceResponseListener Interface for callback invocation when Bonjour service discovery response is received
WifiP2pManager.DnsSdTxtRecordListener Interface for callback invocation when Bonjour TXT record is available for a service
WifiP2pManager.GroupInfoListener Interface for callback invocation when group info is available
WifiP2pManager.NetworkInfoListener Interface for callback invocation when NetworkInfo is available in response to WifiP2pManager.requestNetworkInfo(WifiP2pManager.Channel, WifiP2pManager.NetworkInfoListener).
WifiP2pManager.P2pStateListener Interface for callback invocation when p2p state is available in response to WifiP2pManager.requestP2pState(WifiP2pManager.Channel, WifiP2pManager.P2pStateListener).
WifiP2pManager.PeerListListener Interface for callback invocation when peer list is available
WifiP2pManager.ServiceResponseListener Interface for callback invocation when service discovery response other than Upnp or Bonjour is received
WifiP2pManager.UpnpServiceResponseListener Interface for callback invocation when upnp service discovery response is received * @apiSince 16
Classes
WifiP2pConfig A class representing a Wi-Fi P2p configuration for setting up a connection
WifiP2pConfig.Builder Builder used to build WifiP2pConfig objects for creating or joining a group.
WifiP2pDevice A class representing a Wi-Fi p2p device Note that the operations are not thread safe
WifiP2pDeviceList A class representing a Wi-Fi P2p device list.
WifiP2pGroup A class representing a Wi-Fi P2p group.
WifiP2pInfo A class representing connection information about a Wi-Fi p2p group
WifiP2pManager This class provides the API for managing Wi-Fi peer-to-peer connectivity.
WifiP2pManager.Channel A channel that connects the application to the Wifi p2p framework.
WifiP2pWfdInfo A class representing Wifi Display information for a device.