# LowpanManager Summary:[Nested Classes](https://developer.android.com/reference/com/google/android/things/lowpan/LowpanManager#nestedclasses)\|[Methods](https://developer.android.com/reference/com/google/android/things/lowpan/LowpanManager#pubmethods)\|[Inherited Methods](https://developer.android.com/reference/com/google/android/things/lowpan/LowpanManager#inhmethods)\|[\[Expand All\]](https://developer.android.com/reference/com/google/android/things/lowpan/LowpanManager#) # LowpanManager ` public class LowpanManager ` ` extends `[Object](https://developer.android.com/reference/java/lang/Object)` `` ` |---|------------------------------------------------| | [java.lang.Object](https://developer.android.com/reference/java/lang/Object) || | ↳ | com.google.android.things.lowpan.LowpanManager |
*** ** * ** *** Manager object for looking up LoWPAN interfaces. **See also:** - [LowpanInterface](https://developer.android.com/reference/com/google/android/things/lowpan/LowpanInterface) ## Summary | ### Nested classes || |----------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------| | ` class` | [LowpanManager.Callback](https://developer.android.com/reference/com/google/android/things/lowpan/LowpanManager.Callback) Callback base class for[LowpanManager](https://developer.android.com/reference/com/google/android/things/lowpan/LowpanManager). | | ### Public methods || |-------------------------------------------------------------------------------------------------------------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------| | ` static `[LowpanManager](https://developer.android.com/reference/com/google/android/things/lowpan/LowpanManager) | ` `[getInstance](https://developer.android.com/reference/com/google/android/things/lowpan/LowpanManager#getInstance())`() ` Gets an instance of[LowpanManager](https://developer.android.com/reference/com/google/android/things/lowpan/LowpanManager). | | ` `[LowpanInterface](https://developer.android.com/reference/com/google/android/things/lowpan/LowpanInterface) | ` `[getInterface](https://developer.android.com/reference/com/google/android/things/lowpan/LowpanManager#getInterface())`() ` Gets default[LowpanInterface](https://developer.android.com/reference/com/google/android/things/lowpan/LowpanInterface). | | ` `[LowpanInterface](https://developer.android.com/reference/com/google/android/things/lowpan/LowpanInterface) | ` `[getInterface](https://developer.android.com/reference/com/google/android/things/lowpan/LowpanManager#getInterface(java.lang.String))`(`[String](https://developer.android.com/reference/java/lang/String)` name) ` Returns a reference to the requested[LowpanInterface](https://developer.android.com/reference/com/google/android/things/lowpan/LowpanInterface)object. | | ` `[String[]](https://developer.android.com/reference/java/lang/String) | ` `[getInterfaceList](https://developer.android.com/reference/com/google/android/things/lowpan/LowpanManager#getInterfaceList())`() ` Returns a string array containing the names of LoWPAN interfaces. | | ` void` | ` `[registerCallback](https://developer.android.com/reference/com/google/android/things/lowpan/LowpanManager#registerCallback(com.google.android.things.lowpan.LowpanManager.Callback))`(`[LowpanManager.Callback](https://developer.android.com/reference/com/google/android/things/lowpan/LowpanManager.Callback)` cb) ` | | ` void` | ` `[registerCallback](https://developer.android.com/reference/com/google/android/things/lowpan/LowpanManager#registerCallback(android.os.Handler, com.google.android.things.lowpan.LowpanManager.Callback))`(`[Handler](https://developer.android.com/reference/android/os/Handler.html)` handler, `[LowpanManager.Callback](https://developer.android.com/reference/com/google/android/things/lowpan/LowpanManager.Callback)` cb) ` Registers a callback object to receive notifications when LoWPAN interfaces are added or removed. | | ` void` | ` `[unregisterCallback](https://developer.android.com/reference/com/google/android/things/lowpan/LowpanManager#unregisterCallback(com.google.android.things.lowpan.LowpanManager.Callback))`(`[LowpanManager.Callback](https://developer.android.com/reference/com/google/android/things/lowpan/LowpanManager.Callback)` cb) ` Unregisters a previously registered[LowpanManager.Callback](https://developer.android.com/reference/com/google/android/things/lowpan/LowpanManager.Callback)object. | | ### Inherited methods | |-----------------------|---| | [![](https://developer.android.com/static/assets/images/styles/disclosure_down.png)](https://developer.android.com/reference/com/google/android/things/lowpan/LowpanManager#)From class` `[java.lang.Object](https://developer.android.com/reference/java/lang/Object)` ` |--------------------------------------------------------------------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------| | ` `[Object](https://developer.android.com/reference/java/lang/Object) | ` `[clone](https://developer.android.com/reference/java/lang/Object#clone())`() ` Creates and returns a copy of this object. | | ` boolean` | ` `[equals](https://developer.android.com/reference/java/lang/Object#equals(java.lang.Object))`(`[Object](https://developer.android.com/reference/java/lang/Object)` obj) ` Indicates whether some other object is "equal to" this one. | | ` void` | ` `[finalize](https://developer.android.com/reference/java/lang/Object#finalize())`() ` Called by the garbage collector on an object when garbage collection determines that there are no more references to the object. | | ` final `[Class](https://developer.android.com/reference/java/lang/Class)`` | ` `[getClass](https://developer.android.com/reference/java/lang/Object#getClass())`() ` Returns the runtime class of this`Object`. | | ` int` | ` `[hashCode](https://developer.android.com/reference/java/lang/Object#hashCode())`() ` Returns a hash code value for the object. | | ` final void` | ` `[notify](https://developer.android.com/reference/java/lang/Object#notify())`() ` Wakes up a single thread that is waiting on this object's monitor. | | ` final void` | ` `[notifyAll](https://developer.android.com/reference/java/lang/Object#notifyAll())`() ` Wakes up all threads that are waiting on this object's monitor. | | ` `[String](https://developer.android.com/reference/java/lang/String) | ` `[toString](https://developer.android.com/reference/java/lang/Object#toString())`() ` Returns a string representation of the object. | | ` final void` | ` `[wait](https://developer.android.com/reference/java/lang/Object#wait(long, int))`(long millis, int nanos) ` Causes the current thread to wait until another thread invokes the[notify()](https://developer.android.com/reference/java/lang/Object.html#notify())method or the[notifyAll()](https://developer.android.com/reference/java/lang/Object.html#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](https://developer.android.com/reference/java/lang/Object#wait(long))`(long millis) ` Causes the current thread to wait until either another thread invokes the[notify()](https://developer.android.com/reference/java/lang/Object.html#notify())method or the[notifyAll()](https://developer.android.com/reference/java/lang/Object.html#notifyAll())method for this object, or a specified amount of time has elapsed. | | ` final void` | ` `[wait](https://developer.android.com/reference/java/lang/Object#wait())`() ` Causes the current thread to wait until another thread invokes the[notify()](https://developer.android.com/reference/java/lang/Object.html#notify())method or the[notifyAll()](https://developer.android.com/reference/java/lang/Object.html#notifyAll())method for this object. | || ## Public methods ### getInstance ``` LowpanManager getInstance () ``` Gets an instance of[LowpanManager](https://developer.android.com/reference/com/google/android/things/lowpan/LowpanManager).
| Returns || |---------------------------------------------------------------------------------------------------------|-------------------------------------------------------------------------------------------------------| | [LowpanManager](https://developer.android.com/reference/com/google/android/things/lowpan/LowpanManager) | An instance of the LowpanManager object, or`null`if this device does not support this feature.
| ### getInterface ``` LowpanInterface getInterface () ``` Gets default[LowpanInterface](https://developer.android.com/reference/com/google/android/things/lowpan/LowpanInterface).
| Returns || |-------------------------------------------------------------------------------------------------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------| | [LowpanInterface](https://developer.android.com/reference/com/google/android/things/lowpan/LowpanInterface) | a reference to the first registered[LowpanInterface](https://developer.android.com/reference/com/google/android/things/lowpan/LowpanInterface)object. If there are no LoWPAN interfaces registered, returns`null`.
| ### getInterface ``` LowpanInterface getInterface (String name) ``` Returns a reference to the requested[LowpanInterface](https://developer.android.com/reference/com/google/android/things/lowpan/LowpanInterface)object. If the given interface doesn't exist, or it is not a LoWPAN interface, returns null.
| Parameters || |--------|-----------------| | `name` | `String`
| | Returns || |-------------------------------------------------------------------------------------------------------------|--------| | [LowpanInterface](https://developer.android.com/reference/com/google/android/things/lowpan/LowpanInterface) |
| ### getInterfaceList ``` String[] getInterfaceList () ``` Returns a string array containing the names of LoWPAN interfaces. This list may contain fewer interfaces if the calling process does not have permissions to see individual interfaces.
| Returns || |----------------------------------------------------------------------|--------| | [String[]](https://developer.android.com/reference/java/lang/String) |
| ### registerCallback ``` void registerCallback (LowpanManager.Callback cb) ```

| Parameters || |------|---------------------------------| | `cb` | `LowpanManager.Callback`
| | Throws || |-------------------------------------------------------------------------------------------------------------|---| | [LowpanException](https://developer.android.com/reference/com/google/android/things/lowpan/LowpanException) | | ### registerCallback ``` void registerCallback (Handler handler, LowpanManager.Callback cb) ``` Registers a callback object to receive notifications when LoWPAN interfaces are added or removed.
| Parameters || |-----------|---------------------------------| | `handler` | `Handler`
| | `cb` | `LowpanManager.Callback`
| | Throws || |-------------------------------------------------------------------------------------------------------------|---| | [LowpanException](https://developer.android.com/reference/com/google/android/things/lowpan/LowpanException) | | ### unregisterCallback ``` void unregisterCallback (LowpanManager.Callback cb) ``` Unregisters a previously registered[LowpanManager.Callback](https://developer.android.com/reference/com/google/android/things/lowpan/LowpanManager.Callback)object.
| Parameters || |------|---------------------------------| | `cb` | `LowpanManager.Callback`
| - ## Classes - [LowpanBeaconInfo](https://developer.android.com/reference/com/google/android/things/lowpan/LowpanBeaconInfo) - [LowpanCredential](https://developer.android.com/reference/com/google/android/things/lowpan/LowpanCredential) - [LowpanEnergyScanResult](https://developer.android.com/reference/com/google/android/things/lowpan/LowpanEnergyScanResult) - [LowpanIdentity](https://developer.android.com/reference/com/google/android/things/lowpan/LowpanIdentity) - [LowpanIdentity.Builder](https://developer.android.com/reference/com/google/android/things/lowpan/LowpanIdentity.Builder) - [LowpanInterface](https://developer.android.com/reference/com/google/android/things/lowpan/LowpanInterface) - [LowpanInterface.Callback](https://developer.android.com/reference/com/google/android/things/lowpan/LowpanInterface.Callback) - [LowpanManager](https://developer.android.com/reference/com/google/android/things/lowpan/LowpanManager) - [LowpanManager.Callback](https://developer.android.com/reference/com/google/android/things/lowpan/LowpanManager.Callback) - [LowpanProvisioningParams](https://developer.android.com/reference/com/google/android/things/lowpan/LowpanProvisioningParams) - [LowpanProvisioningParams.Builder](https://developer.android.com/reference/com/google/android/things/lowpan/LowpanProvisioningParams.Builder) - [LowpanScanner](https://developer.android.com/reference/com/google/android/things/lowpan/LowpanScanner) - [LowpanScanner.Callback](https://developer.android.com/reference/com/google/android/things/lowpan/LowpanScanner.Callback) - ## Exceptions - [InterfaceDisabledException](https://developer.android.com/reference/com/google/android/things/lowpan/InterfaceDisabledException) - [JoinFailedAtAuthException](https://developer.android.com/reference/com/google/android/things/lowpan/JoinFailedAtAuthException) - [JoinFailedAtScanException](https://developer.android.com/reference/com/google/android/things/lowpan/JoinFailedAtScanException) - [JoinFailedException](https://developer.android.com/reference/com/google/android/things/lowpan/JoinFailedException) - [LowpanException](https://developer.android.com/reference/com/google/android/things/lowpan/LowpanException) - [LowpanRuntimeException](https://developer.android.com/reference/com/google/android/things/lowpan/LowpanRuntimeException) - [NetworkAlreadyExistsException](https://developer.android.com/reference/com/google/android/things/lowpan/NetworkAlreadyExistsException) - [OperationCanceledException](https://developer.android.com/reference/com/google/android/things/lowpan/OperationCanceledException) - [WrongStateException](https://developer.android.com/reference/com/google/android/things/lowpan/WrongStateException)