Android APIs
public class

WifiManager

extends Object
java.lang.Object
   ↳ android.net.wifi.WifiManager

Class Overview

This class provides the primary API for managing all aspects of Wi-Fi connectivity. Get an instance of this class by calling Context.getSystemService(Context.WIFI_SERVICE). It deals with several categories of items:

  • The list of configured networks. The list can be viewed and updated, and attributes of individual entries can be modified.
  • The currently active Wi-Fi network, if any. Connectivity can be established or torn down, and dynamic information about the state of the network can be queried.
  • Results of access point scans, containing enough information to make decisions about what access point to connect to.
  • It defines the names of various Intent actions that are broadcast upon any sort of change in Wi-Fi state.
This is the API to use when performing Wi-Fi specific operations. To perform operations that pertain to network connectivity at an abstract level, use ConnectivityManager.

Summary

Nested Classes
class WifiManager.MulticastLock Allows an application to receive Wifi Multicast packets. 
class WifiManager.WifiLock Allows an application to keep the Wi-Fi radio awake. 
class WifiManager.WpsCallback Interface for callback invocation on a start WPS action  
Constants
String ACTION_PICK_WIFI_NETWORK Activity Action: Pick a Wi-Fi network to connect to.
String ACTION_REQUEST_SCAN_ALWAYS_AVAILABLE Activity Action: Show a system activity that allows the user to enable scans to be available even with Wi-Fi turned off.
int ERROR_AUTHENTICATING The error code if there was a problem authenticating.
String EXTRA_BSSID The lookup key for a String giving the BSSID of the access point to which we are connected.
String EXTRA_NETWORK_INFO The lookup key for a NetworkInfo object associated with the Wi-Fi network.
String EXTRA_NEW_RSSI The lookup key for an int giving the new RSSI in dBm.
String EXTRA_NEW_STATE The lookup key for a SupplicantState describing the new state Retrieve with getParcelableExtra(String).
String EXTRA_PREVIOUS_WIFI_STATE The previous Wi-Fi state.
String EXTRA_RESULTS_UPDATED Lookup key for a boolean representing the result of previous startScan() operation, reported with SCAN_RESULTS_AVAILABLE_ACTION.
String EXTRA_SUPPLICANT_CONNECTED The lookup key for a boolean that indicates whether a connection to the supplicant daemon has been gained or lost.
String EXTRA_SUPPLICANT_ERROR The lookup key for a SupplicantState describing the supplicant error code if any Retrieve with getIntExtra(String, int).
String EXTRA_WIFI_INFO The lookup key for a WifiInfo object giving the information about the access point to which we are connected.
String EXTRA_WIFI_STATE The lookup key for an int that indicates whether Wi-Fi is enabled, disabled, enabling, disabling, or unknown.
String NETWORK_IDS_CHANGED_ACTION The network IDs of the configured networks could have changed.
String NETWORK_STATE_CHANGED_ACTION Broadcast intent action indicating that the state of Wi-Fi connectivity has changed.
String RSSI_CHANGED_ACTION The RSSI (signal strength) has changed.
String SCAN_RESULTS_AVAILABLE_ACTION An access point scan has completed, and results are available from the supplicant.
String SUPPLICANT_CONNECTION_CHANGE_ACTION Broadcast intent action indicating that a connection to the supplicant has been established (and it is now possible to perform Wi-Fi operations) or the connection to the supplicant has been lost.
String SUPPLICANT_STATE_CHANGED_ACTION Broadcast intent action indicating that the state of establishing a connection to an access point has changed.One extra provides the new SupplicantState.
int WIFI_MODE_FULL In this Wi-Fi lock mode, Wi-Fi will be kept active, and will behave normally, i.e., it will attempt to automatically establish a connection to a remembered access point that is within range, and will do periodic scans if there are remembered access points but none are in range.
int WIFI_MODE_FULL_HIGH_PERF In this Wi-Fi lock mode, Wi-Fi will be kept active as in mode WIFI_MODE_FULL but it operates at high performance with minimum packet loss and low packet latency even when the device screen is off.
int WIFI_MODE_SCAN_ONLY In this Wi-Fi lock mode, Wi-Fi will be kept active, but the only operation that will be supported is initiation of scans, and the subsequent reporting of scan results.
String WIFI_STATE_CHANGED_ACTION Broadcast intent action indicating that Wi-Fi has been enabled, disabled, enabling, disabling, or unknown.
int WIFI_STATE_DISABLED Wi-Fi is disabled.
int WIFI_STATE_DISABLING Wi-Fi is currently being disabled.
int WIFI_STATE_ENABLED Wi-Fi is enabled.
int WIFI_STATE_ENABLING Wi-Fi is currently being enabled.
int WIFI_STATE_UNKNOWN Wi-Fi is in an unknown state.
int WPS_AUTH_FAILURE Authentication failure on WPS
int WPS_OVERLAP_ERROR WPS overlap detected
int WPS_TIMED_OUT WPS timed out
int WPS_TKIP_ONLY_PROHIBITED TKIP only prohibited
int WPS_WEP_PROHIBITED WEP on WPS is prohibited
Public Methods
int addNetwork(WifiConfiguration config)
Add a new network description to the set of configured networks.
static int calculateSignalLevel(int rssi, int numLevels)
Calculates the level of the signal.
void cancelWps(WifiManager.WpsCallback listener)
Cancel any ongoing Wi-fi Protected Setup
static int compareSignalLevel(int rssiA, int rssiB)
Compares two signal strengths.
WifiManager.MulticastLock createMulticastLock(String tag)
Create a new MulticastLock
WifiManager.WifiLock createWifiLock(String tag)
Creates a new WifiLock.
WifiManager.WifiLock createWifiLock(int lockType, String tag)
Creates a new WifiLock.
boolean disableNetwork(int netId)
Disable a configured network.
boolean disconnect()
Disassociate from the currently active access point.
boolean enableNetwork(int netId, boolean disableOthers)
Allow a previously configured network to be associated with.
List<WifiConfiguration> getConfiguredNetworks()
Return a list of all the networks configured in the supplicant.
WifiInfo getConnectionInfo()
Return dynamic information about the current Wi-Fi connection, if any is active.
DhcpInfo getDhcpInfo()
Return the DHCP-assigned addresses from the last successful DHCP request, if any.
List<ScanResult> getScanResults()
Return the results of the latest access point scan.
int getWifiState()
Gets the Wi-Fi enabled state.
boolean is5GHzBandSupported()
boolean isDeviceToApRttSupported()
boolean isEnhancedPowerReportingSupported()
boolean isP2pSupported()
boolean isPreferredNetworkOffloadSupported()
boolean isScanAlwaysAvailable()
Check if scanning is always available.
boolean isTdlsSupported()
boolean isWifiEnabled()
Return whether Wi-Fi is enabled or disabled.
boolean pingSupplicant()
Check that the supplicant daemon is responding to requests.
boolean reassociate()
Reconnect to the currently active access point, even if we are already connected.
boolean reconnect()
Reconnect to the currently active access point, if we are currently disconnected.
boolean removeNetwork(int netId)
Remove the specified network from the list of configured networks.
boolean saveConfiguration()
Tell the supplicant to persist the current list of configured networks.
void setTdlsEnabled(InetAddress remoteIPAddress, boolean enable)
Enable/Disable TDLS on a specific local route.
void setTdlsEnabledWithMacAddress(String remoteMacAddress, boolean enable)
Similar to setTdlsEnabled(InetAddress, boolean), except this version allows you to specify remote endpoint with a MAC address.
boolean setWifiEnabled(boolean enabled)
Enable or disable Wi-Fi.
boolean startScan()
Request a scan for access points.
void startWps(WpsInfo config, WifiManager.WpsCallback listener)
Start Wi-fi Protected Setup
int updateNetwork(WifiConfiguration config)
Update the network description of an existing configured network.
Protected Methods
void finalize()
Invoked when the garbage collector has detected that this instance is no longer reachable.
[Expand]
Inherited Methods
From class java.lang.Object

Constants

public static final String ACTION_PICK_WIFI_NETWORK

Added in API level 1

Activity Action: Pick a Wi-Fi network to connect to.

Input: Nothing.

Output: Nothing.

Constant Value: "android.net.wifi.PICK_WIFI_NETWORK"

public static final String ACTION_REQUEST_SCAN_ALWAYS_AVAILABLE

Added in API level 18

Activity Action: Show a system activity that allows the user to enable scans to be available even with Wi-Fi turned off.

Notification of the result of this activity is posted using the onActivityResult(int, int, Intent) callback. The resultCode will be RESULT_OK if scan always mode has been turned on or RESULT_CANCELED if the user has rejected the request or an error has occurred.

Constant Value: "android.net.wifi.action.REQUEST_SCAN_ALWAYS_AVAILABLE"

public static final int ERROR_AUTHENTICATING

Added in API level 1

The error code if there was a problem authenticating.

Constant Value: 1 (0x00000001)

public static final String EXTRA_BSSID

Added in API level 1

The lookup key for a String giving the BSSID of the access point to which we are connected. Only present when the new state is CONNECTED. Retrieve with getStringExtra(String).

Constant Value: "bssid"

public static final String EXTRA_NETWORK_INFO

Added in API level 1

The lookup key for a NetworkInfo object associated with the Wi-Fi network. Retrieve with getParcelableExtra(String).

Constant Value: "networkInfo"

public static final String EXTRA_NEW_RSSI

Added in API level 1

The lookup key for an int giving the new RSSI in dBm.

Constant Value: "newRssi"

public static final String EXTRA_NEW_STATE

Added in API level 1

The lookup key for a SupplicantState describing the new state Retrieve with getParcelableExtra(String).

Constant Value: "newState"

public static final String EXTRA_PREVIOUS_WIFI_STATE

Added in API level 1

The previous Wi-Fi state.

See also:

Constant Value: "previous_wifi_state"

public static final String EXTRA_RESULTS_UPDATED

Added in API level 23

Lookup key for a boolean representing the result of previous startScan() operation, reported with SCAN_RESULTS_AVAILABLE_ACTION.

Constant Value: "resultsUpdated"

public static final String EXTRA_SUPPLICANT_CONNECTED

Added in API level 1

The lookup key for a boolean that indicates whether a connection to the supplicant daemon has been gained or lost. true means a connection now exists. Retrieve it with getBooleanExtra(String, boolean).

Constant Value: "connected"

public static final String EXTRA_SUPPLICANT_ERROR

Added in API level 1

The lookup key for a SupplicantState describing the supplicant error code if any Retrieve with getIntExtra(String, int).

Constant Value: "supplicantError"

public static final String EXTRA_WIFI_INFO

Added in API level 14

The lookup key for a WifiInfo object giving the information about the access point to which we are connected. Only present when the new state is CONNECTED. Retrieve with getParcelableExtra(String).

Constant Value: "wifiInfo"

public static final String EXTRA_WIFI_STATE

Added in API level 1

The lookup key for an int that indicates whether Wi-Fi is enabled, disabled, enabling, disabling, or unknown. Retrieve it with getIntExtra(String, int).

Constant Value: "wifi_state"

public static final String NETWORK_IDS_CHANGED_ACTION

Added in API level 1

The network IDs of the configured networks could have changed.

Constant Value: "android.net.wifi.NETWORK_IDS_CHANGED"

public static final String NETWORK_STATE_CHANGED_ACTION

Added in API level 1

Broadcast intent action indicating that the state of Wi-Fi connectivity has changed. One extra provides the new state in the form of a NetworkInfo object. If the new state is CONNECTED, additional extras may provide the BSSID and WifiInfo of the access point. as a String.

Constant Value: "android.net.wifi.STATE_CHANGE"

public static final String RSSI_CHANGED_ACTION

Added in API level 1

The RSSI (signal strength) has changed.

See also:

Constant Value: "android.net.wifi.RSSI_CHANGED"

public static final String SCAN_RESULTS_AVAILABLE_ACTION

Added in API level 1

An access point scan has completed, and results are available from the supplicant. Call getScanResults() to obtain the results. EXTRA_RESULTS_UPDATED indicates if the scan was completed successfully.

Constant Value: "android.net.wifi.SCAN_RESULTS"

public static final String SUPPLICANT_CONNECTION_CHANGE_ACTION

Added in API level 1

Broadcast intent action indicating that a connection to the supplicant has been established (and it is now possible to perform Wi-Fi operations) or the connection to the supplicant has been lost. One extra provides the connection state as a boolean, where true means CONNECTED.

Constant Value: "android.net.wifi.supplicant.CONNECTION_CHANGE"

public static final String SUPPLICANT_STATE_CHANGED_ACTION

Added in API level 1

Broadcast intent action indicating that the state of establishing a connection to an access point has changed.One extra provides the new SupplicantState. Note that the supplicant state is Wi-Fi specific, and is not generally the most useful thing to look at if you are just interested in the overall state of connectivity.

Constant Value: "android.net.wifi.supplicant.STATE_CHANGE"

public static final int WIFI_MODE_FULL

Added in API level 3

In this Wi-Fi lock mode, Wi-Fi will be kept active, and will behave normally, i.e., it will attempt to automatically establish a connection to a remembered access point that is within range, and will do periodic scans if there are remembered access points but none are in range.

Constant Value: 1 (0x00000001)

public static final int WIFI_MODE_FULL_HIGH_PERF

Added in API level 12

In this Wi-Fi lock mode, Wi-Fi will be kept active as in mode WIFI_MODE_FULL but it operates at high performance with minimum packet loss and low packet latency even when the device screen is off. This mode will consume more power and hence should be used only when there is a need for such an active connection.

An example use case is when a voice connection needs to be kept active even after the device screen goes off. Holding the regular WIFI_MODE_FULL lock will keep the wifi connection active, but the connection can be lossy. Holding a WIFI_MODE_FULL_HIGH_PERF lock for the duration of the voice call will improve the call quality.

When there is no support from the hardware, this lock mode will have the same behavior as WIFI_MODE_FULL

Constant Value: 3 (0x00000003)

public static final int WIFI_MODE_SCAN_ONLY

Added in API level 3

In this Wi-Fi lock mode, Wi-Fi will be kept active, but the only operation that will be supported is initiation of scans, and the subsequent reporting of scan results. No attempts will be made to automatically connect to remembered access points, nor will periodic scans be automatically performed looking for remembered access points. Scans must be explicitly requested by an application in this mode.

Constant Value: 2 (0x00000002)

public static final String WIFI_STATE_CHANGED_ACTION

Added in API level 1

Broadcast intent action indicating that Wi-Fi has been enabled, disabled, enabling, disabling, or unknown. One extra provides this state as an int. Another extra provides the previous state, if available.

Constant Value: "android.net.wifi.WIFI_STATE_CHANGED"

public static final int WIFI_STATE_DISABLED

Added in API level 1

Wi-Fi is disabled.

Constant Value: 1 (0x00000001)

public static final int WIFI_STATE_DISABLING

Added in API level 1

Wi-Fi is currently being disabled. The state will change to WIFI_STATE_DISABLED if it finishes successfully.

Constant Value: 0 (0x00000000)

public static final int WIFI_STATE_ENABLED

Added in API level 1

Wi-Fi is enabled.

Constant Value: 3 (0x00000003)

public static final int WIFI_STATE_ENABLING

Added in API level 1

Wi-Fi is currently being enabled. The state will change to WIFI_STATE_ENABLED if it finishes successfully.

Constant Value: 2 (0x00000002)

public static final int WIFI_STATE_UNKNOWN

Added in API level 1

Wi-Fi is in an unknown state. This state will occur when an error happens while enabling or disabling.

Constant Value: 4 (0x00000004)

public static final int WPS_AUTH_FAILURE

Added in API level 21

Authentication failure on WPS

Constant Value: 6 (0x00000006)

public static final int WPS_OVERLAP_ERROR

Added in API level 21

WPS overlap detected

Constant Value: 3 (0x00000003)

public static final int WPS_TIMED_OUT

Added in API level 21

WPS timed out

Constant Value: 7 (0x00000007)

public static final int WPS_TKIP_ONLY_PROHIBITED

Added in API level 21

TKIP only prohibited

Constant Value: 5 (0x00000005)

public static final int WPS_WEP_PROHIBITED

Added in API level 21

WEP on WPS is prohibited

Constant Value: 4 (0x00000004)

Public Methods

public int addNetwork (WifiConfiguration config)

Added in API level 1

Add a new network description to the set of configured networks. The networkId field of the supplied configuration object is ignored.

The new network will be marked DISABLED by default. To enable it, called enableNetwork(int, boolean).

Parameters
config WifiConfiguration: the set of variables that describe the configuration, contained in a WifiConfiguration object.
Returns
int the ID of the newly created network description. This is used in other operations to specified the network to be acted upon. Returns -1 on failure.

public static int calculateSignalLevel (int rssi, int numLevels)

Added in API level 1

Calculates the level of the signal. This should be used any time a signal is being shown.

Parameters
rssi int: The power of the signal measured in RSSI.
numLevels int: The number of levels to consider in the calculated level.
Returns
int A level of the signal, given in the range of 0 to numLevels-1 (both inclusive).

public void cancelWps (WifiManager.WpsCallback listener)

Added in API level 21

Cancel any ongoing Wi-fi Protected Setup

Parameters
listener WifiManager.WpsCallback: for callbacks on success or failure. Can be null.
Throws
IllegalStateException if the WifiManager instance needs to be initialized again

public static int compareSignalLevel (int rssiA, int rssiB)

Added in API level 1

Compares two signal strengths.

Parameters
rssiA int: The power of the first signal measured in RSSI.
rssiB int: The power of the second signal measured in RSSI.
Returns
int Returns <0 if the first signal is weaker than the second signal, 0 if the two signals have the same strength, and >0 if the first signal is stronger than the second signal.

public WifiManager.MulticastLock createMulticastLock (String tag)

Added in API level 4

Create a new MulticastLock

Parameters
tag String: a tag for the MulticastLock to identify it in debugging messages. This string is never shown to the user under normal conditions, but should be descriptive enough to identify your application and the specific MulticastLock within it, if it holds multiple MulticastLocks.
Returns
WifiManager.MulticastLock a new, unacquired MulticastLock with the given tag.

public WifiManager.WifiLock createWifiLock (String tag)

Added in API level 1

Creates a new WifiLock.

Parameters
tag String: a tag for the WifiLock to identify it in debugging messages. This string is never shown to the user under normal conditions, but should be descriptive enough to identify your application and the specific WifiLock within it, if it holds multiple WifiLocks.
Returns
WifiManager.WifiLock a new, unacquired WifiLock with the given tag.

public WifiManager.WifiLock createWifiLock (int lockType, String tag)

Added in API level 3

Creates a new WifiLock.

Parameters
lockType int: the type of lock to create. See WIFI_MODE_FULL, WIFI_MODE_FULL_HIGH_PERF and WIFI_MODE_SCAN_ONLY for descriptions of the types of Wi-Fi locks.
tag String: a tag for the WifiLock to identify it in debugging messages. This string is never shown to the user under normal conditions, but should be descriptive enough to identify your application and the specific WifiLock within it, if it holds multiple WifiLocks.
Returns
WifiManager.WifiLock a new, unacquired WifiLock with the given tag.

public boolean disableNetwork (int netId)

Added in API level 1

Disable a configured network. The specified network will not be a candidate for associating. This may result in the asynchronous delivery of state change events.

Parameters
netId int: the ID of the network as returned by addNetwork(WifiConfiguration).
Returns
boolean true if the operation succeeded

public boolean disconnect ()

Added in API level 1

Disassociate from the currently active access point. This may result in the asynchronous delivery of state change events.

Returns
boolean true if the operation succeeded

public boolean enableNetwork (int netId, boolean disableOthers)

Added in API level 1

Allow a previously configured network to be associated with. If disableOthers is true, then all other configured networks are disabled, and an attempt to connect to the selected network is initiated. This may result in the asynchronous delivery of state change events.

Note: If an application's target SDK version is LOLLIPOP or newer, network communication may not use Wi-Fi even if Wi-Fi is connected; traffic may instead be sent through another network, such as cellular data, Bluetooth tethering, or Ethernet. For example, traffic will never use a Wi-Fi network that does not provide Internet access (e.g. a wireless printer), if another network that does offer Internet access (e.g. cellular data) is available. Applications that need to ensure that their network traffic uses Wi-Fi should use APIs such as bindSocket(java.net.Socket), openConnection(java.net.URL), or bindProcessToNetwork(Network) to do so.

Parameters
netId int: the ID of the network in the list of configured networks
disableOthers boolean: if true, disable all other networks. The way to select a particular network to connect to is specify true for this parameter.
Returns
boolean true if the operation succeeded

public List<WifiConfiguration> getConfiguredNetworks ()

Added in API level 1

Return a list of all the networks configured in the supplicant. Not all fields of WifiConfiguration are returned. Only the following fields are filled in:

  • networkId
  • SSID
  • BSSID
  • priority
  • allowedProtocols
  • allowedKeyManagement
  • allowedAuthAlgorithms
  • allowedPairwiseCiphers
  • allowedGroupCiphers

Returns
List<WifiConfiguration> a list of network configurations in the form of a list of WifiConfiguration objects. Upon failure to fetch or when when Wi-Fi is turned off, it can be null.

public WifiInfo getConnectionInfo ()

Added in API level 1

Return dynamic information about the current Wi-Fi connection, if any is active.

Returns
WifiInfo the Wi-Fi information, contained in WifiInfo.

public DhcpInfo getDhcpInfo ()

Added in API level 1

Return the DHCP-assigned addresses from the last successful DHCP request, if any.

Returns
DhcpInfo the DHCP information

public List<ScanResult> getScanResults ()

Added in API level 1

Return the results of the latest access point scan.

Returns
List<ScanResult> the list of access points found in the most recent scan. An app must hold ACCESS_COARSE_LOCATION or ACCESS_FINE_LOCATION permission in order to get valid results.

public int getWifiState ()

Added in API level 1

public boolean is5GHzBandSupported ()

Added in API level 21

Returns
boolean true if this adapter supports 5 GHz band

public boolean isDeviceToApRttSupported ()

Added in API level 21

Returns
boolean true if this adapter supports Device-to-AP RTT

public boolean isEnhancedPowerReportingSupported ()

Added in API level 21

Returns
boolean true if this adapter supports advanced power/performance counters

public boolean isP2pSupported ()

Added in API level 21

Returns
boolean true if this adapter supports WifiP2pManager (Wi-Fi Direct)

public boolean isPreferredNetworkOffloadSupported ()

Added in API level 21

Returns
boolean true if this adapter supports offloaded connectivity scan

public boolean isScanAlwaysAvailable ()

Added in API level 18

Check if scanning is always available. If this return true, apps can issue startScan() and fetch scan results even when Wi-Fi is turned off. To change this setting, see ACTION_REQUEST_SCAN_ALWAYS_AVAILABLE.

Returns
boolean

public boolean isTdlsSupported ()

Added in API level 21

Returns
boolean true if this adapter supports Tunnel Directed Link Setup

public boolean isWifiEnabled ()

Added in API level 1

Return whether Wi-Fi is enabled or disabled.

Returns
boolean true if Wi-Fi is enabled

See also:

public boolean pingSupplicant ()

Added in API level 1

Check that the supplicant daemon is responding to requests.

Returns
boolean true if we were able to communicate with the supplicant and it returned the expected response to the PING message.

public boolean reassociate ()

Added in API level 1

Reconnect to the currently active access point, even if we are already connected. This may result in the asynchronous delivery of state change events.

Returns
boolean true if the operation succeeded

public boolean reconnect ()

Added in API level 1

Reconnect to the currently active access point, if we are currently disconnected. This may result in the asynchronous delivery of state change events.

Returns
boolean true if the operation succeeded

public boolean removeNetwork (int netId)

Added in API level 1

Remove the specified network from the list of configured networks. This may result in the asynchronous delivery of state change events.

Parameters
netId int: the integer that identifies the network configuration to the supplicant
Returns
boolean true if the operation succeeded

public boolean saveConfiguration ()

Added in API level 1

Tell the supplicant to persist the current list of configured networks.

Note: It is possible for this method to change the network IDs of existing networks. You should assume the network IDs can be different after calling this method.

Returns
boolean true if the operation succeeded

public void setTdlsEnabled (InetAddress remoteIPAddress, boolean enable)

Added in API level 19

Enable/Disable TDLS on a specific local route.

TDLS enables two wireless endpoints to talk to each other directly without going through the access point that is managing the local network. It saves bandwidth and improves quality of the link.

This API enables/disables the option of using TDLS. If enabled, the underlying hardware is free to use TDLS or a hop through the access point. If disabled, existing TDLS session is torn down and hardware is restricted to use access point for transferring wireless packets. Default value for all routes is 'disabled', meaning restricted to use access point for transferring packets.

Parameters
remoteIPAddress InetAddress: IP address of the endpoint to setup TDLS with
enable boolean: true = setup and false = tear down TDLS

public void setTdlsEnabledWithMacAddress (String remoteMacAddress, boolean enable)

Added in API level 19

Similar to setTdlsEnabled(InetAddress, boolean), except this version allows you to specify remote endpoint with a MAC address.

Parameters
remoteMacAddress String: MAC address of the remote endpoint such as 00:00:0c:9f:f2:ab
enable boolean: true = setup and false = tear down TDLS

public boolean setWifiEnabled (boolean enabled)

Added in API level 1

Enable or disable Wi-Fi.

Parameters
enabled boolean: true to enable, false to disable.
Returns
boolean true if the operation succeeds (or if the existing state is the same as the requested state).

public boolean startScan ()

Added in API level 1

Request a scan for access points. Returns immediately. The availability of the results is made known later by means of an asynchronous event sent on completion of the scan.

Returns
boolean true if the operation succeeded, i.e., the scan was initiated

public void startWps (WpsInfo config, WifiManager.WpsCallback listener)

Added in API level 21

Start Wi-fi Protected Setup

Parameters
config WpsInfo: WPS configuration (does not support LABEL)
listener WifiManager.WpsCallback: for callbacks on success or failure. Can be null.
Throws
IllegalStateException if the WifiManager instance needs to be initialized again

public int updateNetwork (WifiConfiguration config)

Added in API level 1

Update the network description of an existing configured network.

Parameters
config WifiConfiguration: the set of variables that describe the configuration, contained in a WifiConfiguration object. It may be sparse, so that only the items that are being changed are non-null. The networkId field must be set to the ID of the existing network being updated.
Returns
int Returns the networkId of the supplied WifiConfiguration on success.
Returns -1 on failure, including when the networkId field of the WifiConfiguration does not refer to an existing network.

Protected Methods

protected void finalize ()

Added in API level 1

Invoked when the garbage collector has detected that this instance is no longer reachable. The default implementation does nothing, but this method can be overridden to free resources.

Note that objects that override finalize are significantly more expensive than objects that don't. Finalizers may be run a long time after the object is no longer reachable, depending on memory pressure, so it's a bad idea to rely on them for cleanup. Note also that finalizers are run on a single VM-wide finalizer thread, so doing blocking work in a finalizer is a bad idea. A finalizer is usually only necessary for a class that has a native peer and needs to call a native method to destroy that peer. Even then, it's better to provide an explicit close method (and implement Closeable), and insist that callers manually dispose of instances. This works well for something like files, but less well for something like a BigInteger where typical calling code would have to deal with lots of temporaries. Unfortunately, code that creates lots of temporaries is the worst kind of code from the point of view of the single finalizer thread.

If you must use finalizers, consider at least providing your own ReferenceQueue and having your own thread process that queue.

Unlike constructors, finalizers are not automatically chained. You are responsible for calling super.finalize() yourself.

Uncaught exceptions thrown by finalizers are ignored and do not terminate the finalizer thread. See Effective Java Item 7, "Avoid finalizers" for more.

Throws
Throwable