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Summary: Constants | Methods | Inherited Methods

WifiAwareManager

public class WifiAwareManager
extends Object

java.lang.Object
↳	android.net.wifi.aware.WifiAwareManager

This class provides the primary API for managing Wi-Fi Aware operations: discovery and peer-to-peer data connections.

The class provides access to:

Initialize a Aware cluster (peer-to-peer synchronization). Refer to attach(android.net.wifi.aware.AttachCallback, android.os.Handler).
Create discovery sessions (publish or subscribe sessions). Refer to WifiAwareSession#publish(PublishConfig, DiscoverySessionCallback, Handler) and WifiAwareSession#subscribe(SubscribeConfig, DiscoverySessionCallback, Handler).
Create a Aware network specifier to be used with ConnectivityManager#requestNetwork(NetworkRequest, ConnectivityManager.NetworkCallback) to set-up a Aware connection with a peer. Refer to WifiAwareNetworkSpecifier.Builder.

Aware may not be usable when Wi-Fi is disabled (and other conditions). To validate that the functionality is available use the isAvailable() function. To track changes in Aware usability register for the ACTION_WIFI_AWARE_STATE_CHANGED broadcast. Note that this broadcast is not sticky - you should register for it and then check the above API to avoid a race condition.

An application must use attach(android.net.wifi.aware.AttachCallback, android.os.Handler) to initialize a Aware cluster - before making any other Aware operation. Aware cluster membership is a device-wide operation - the API guarantees that the device is in a cluster or joins a Aware cluster (or starts one if none can be found). Information about attach success (or failure) are returned in callbacks of AttachCallback. Proceed with Aware discovery or connection setup only after receiving confirmation that Aware attach succeeded - AttachCallback#onAttached(WifiAwareSession). When an application is finished using Aware it must use the WifiAwareSession#close() API to indicate to the Aware service that the device may detach from the Aware cluster. The device will actually disable Aware once the last application detaches.

Once a Aware attach is confirmed use the WifiAwareSession#publish(PublishConfig, DiscoverySessionCallback, Handler) or WifiAwareSession#subscribe(SubscribeConfig, DiscoverySessionCallback, Handler) to create publish or subscribe Aware discovery sessions. Events are called on the provided callback object DiscoverySessionCallback. Specifically, the DiscoverySessionCallback#onPublishStarted(PublishDiscoverySession) and DiscoverySessionCallback#onSubscribeStarted( SubscribeDiscoverySession) return PublishDiscoverySession and SubscribeDiscoverySession objects respectively on which additional session operations can be performed, e.g. updating the session PublishDiscoverySession#updatePublish(PublishConfig) and SubscribeDiscoverySession#updateSubscribe(SubscribeConfig). Sessions can also be used to send messages using the DiscoverySession#sendMessage(PeerHandle, int, byte[]) APIs. When an application is finished with a discovery session it must terminate it using the DiscoverySession#close() API.

Creating connections between Aware devices is managed by the standard ConnectivityManager#requestNetwork(NetworkRequest, ConnectivityManager.NetworkCallback). The NetworkRequest object should be constructed with:

Summary

Constants
`String`	`ACTION_WIFI_AWARE_STATE_CHANGED` Broadcast intent action to indicate that the state of Wi-Fi Aware availability has changed.
`int`	`WIFI_AWARE_DATA_PATH_ROLE_INITIATOR` Connection creation role is that of INITIATOR.
`int`	`WIFI_AWARE_DATA_PATH_ROLE_RESPONDER` Connection creation role is that of RESPONDER.

Public methods
`void`	`attach(AttachCallback attachCallback, Handler handler)` Attach to the Wi-Fi Aware service - enabling the application to create discovery sessions or create connections to peers.
`void`	`attach(AttachCallback attachCallback, IdentityChangedListener identityChangedListener, Handler handler)` Attach to the Wi-Fi Aware service - enabling the application to create discovery sessions or create connections to peers.
`Characteristics`	`getCharacteristics()` Returns the characteristics of the Wi-Fi Aware interface: a set of parameters which specify limitations on configurations, e.g. the maximum service name length.
`boolean`	`isAvailable()` Returns the current status of Aware API: whether or not Aware is available.

Inherited methods

From class


        
          java.lang.Object

`Object`	`clone()` Creates and returns a copy of this object.
`boolean`	`equals(Object obj)` Indicates whether some other object is "equal to" this one.
`void`	`finalize()` Called by the garbage collector on an object when garbage collection determines that there are no more references to the object.
`final Class<?>`	`getClass()` Returns the runtime class of this `Object`.
`int`	`hashCode()` Returns a hash code value for the object.
`final void`	`notify()` Wakes up a single thread that is waiting on this object's monitor.
`final void`	`notifyAll()` Wakes up all threads that are waiting on this object's monitor.
`String`	`toString()` Returns a string representation of the object.
`final void`	`wait(long timeout, int nanos)` Causes the current thread to wait until another thread invokes the `notify()` method or the `notifyAll()` method for this object, or some other thread interrupts the current thread, or a certain amount of real time has elapsed.
`final void`	`wait(long timeout)` Causes the current thread to wait until either another thread invokes the `notify()` method or the `notifyAll()` method for this object, or a specified amount of time has elapsed.
`final void`	`wait()` Causes the current thread to wait until another thread invokes the `notify()` method or the `notifyAll()` method for this object.

Constants

ACTION_WIFI_AWARE_STATE_CHANGED

public static final String ACTION_WIFI_AWARE_STATE_CHANGED

Broadcast intent action to indicate that the state of Wi-Fi Aware availability has changed. Use the isAvailable() to query the current status. This broadcast is not sticky, use the isAvailable() API after registering the broadcast to check the current state of Wi-Fi Aware.

Note: The broadcast is only delivered to registered receivers - no manifest registered components will be launched.

Constant Value: "android.net.wifi.aware.action.WIFI_AWARE_STATE_CHANGED"

WIFI_AWARE_DATA_PATH_ROLE_INITIATOR

public static final int WIFI_AWARE_DATA_PATH_ROLE_INITIATOR

Connection creation role is that of INITIATOR. Used to create a network specifier string when requesting a Aware network.

See also:

Constant Value: 0 (0x00000000)

WIFI_AWARE_DATA_PATH_ROLE_RESPONDER

public static final int WIFI_AWARE_DATA_PATH_ROLE_RESPONDER

Connection creation role is that of RESPONDER. Used to create a network specifier string when requesting a Aware network.

See also:

Constant Value: 1 (0x00000001)

Public methods

attach

public void attach (AttachCallback attachCallback, 
                Handler handler)

Attach to the Wi-Fi Aware service - enabling the application to create discovery sessions or create connections to peers. The device will attach to an existing cluster if it can find one or create a new cluster (if it is the first to enable Aware in its vicinity). Results (e.g. successful attach to a cluster) are provided to the attachCallback object. An application must call WifiAwareSession#close() when done with the Wi-Fi Aware object.

Note: a Aware cluster is a shared resource - if the device is already attached to a cluster then this function will simply indicate success immediately using the same attachCallback.

Parameters
`attachCallback`	`AttachCallback`: A callback for attach events, extended from `AttachCallback`. This value cannot be `null`.
`handler`	`Handler`: The Handler on whose thread to execute the callbacks of the `attachCallback` object. If a null is provided then the application's main thread will be used. This value may be `null`.

attach

public void attach (AttachCallback attachCallback, 
                IdentityChangedListener identityChangedListener, 
                Handler handler)

Note: a Aware cluster is a shared resource - if the device is already attached to a cluster then this function will simply indicate success immediately using the same attachCallback.

This version of the API attaches a listener to receive the MAC address of the Aware interface on startup and whenever it is updated (it is randomized at regular intervals for privacy). The application must have the Manifest.permission.ACCESS_FINE_LOCATION permission to execute this attach request. Otherwise, use the attach(android.net.wifi.aware.AttachCallback, android.os.Handler) version. Note that aside from permission requirements this listener will wake up the host at regular intervals causing higher power consumption, do not use it unless the information is necessary (e.g. for OOB discovery).

Parameters
`attachCallback`	`AttachCallback`: A callback for attach events, extended from `AttachCallback`. This value cannot be `null`.
`identityChangedListener`	`IdentityChangedListener`: A listener for changed identity, extended from `IdentityChangedListener`. This value cannot be `null`.
`handler`	`Handler`: The Handler on whose thread to execute the callbacks of the `attachCallback` and `identityChangedListener` objects. If a null is provided then the application's main thread will be used. This value may be `null`.

getCharacteristics

public Characteristics getCharacteristics ()

Returns the characteristics of the Wi-Fi Aware interface: a set of parameters which specify limitations on configurations, e.g. the maximum service name length.

Returns
`Characteristics`	An object specifying configuration limitations of Aware.

isAvailable

public boolean isAvailable ()

Returns the current status of Aware API: whether or not Aware is available. To track changes in the state of Aware API register for the ACTION_WIFI_AWARE_STATE_CHANGED broadcast.

Returns
`boolean`	A boolean indicating whether the app can use the Aware API at this time (true) or not (false).