Added in [API level 23](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels) Summary: [Ctors](https://developer.android.com/reference/android/webkit/WebMessagePort.WebMessageCallback#pubctors) \| [Methods](https://developer.android.com/reference/android/webkit/WebMessagePort.WebMessageCallback#pubmethods) \| [Inherited Methods](https://developer.android.com/reference/android/webkit/WebMessagePort.WebMessageCallback#inhmethods)

# WebMessagePort.WebMessageCallback

*** ** * ** ***

` public static abstract class WebMessagePort.WebMessageCallback `   
` extends https://developer.android.com/reference/java/lang/Object ` ` `

|---|---|
| [java.lang.Object](https://developer.android.com/reference/java/lang/Object) ||
| ↳ | android.webkit.WebMessagePort.WebMessageCallback |

<br />

*** ** * ** ***

The listener for handling MessagePort events. The message callback methods are called on the main thread. If the embedder application wants to receive the messages on a different thread, it can do this by passing a Handler in `https://developer.android.com/reference/android/webkit/WebMessagePort#setWebMessageCallback(android.webkit.WebMessagePort.WebMessageCallback,%20android.os.Handler)`. In the latter case, the application should be extra careful for thread safety since WebMessagePort methods should be called on main thread.

## Summary

| ### Public constructors ||
|---|---|
| ` https://developer.android.com/reference/android/webkit/WebMessagePort.WebMessageCallback#WebMessageCallback()() ` |

| ### Public methods ||
|---|---|
| ` void` | ` https://developer.android.com/reference/android/webkit/WebMessagePort.WebMessageCallback#onMessage(android.webkit.WebMessagePort,%20android.webkit.WebMessage)(https://developer.android.com/reference/android/webkit/WebMessagePort port, https://developer.android.com/reference/android/webkit/WebMessage message) ` Message callback for receiving onMessage events. |

### Inherited methods

From class ` https://developer.android.com/reference/java/lang/Object ` ` https://developer.android.com/reference/java/lang/Object` ` https://developer.android.com/reference/java/lang/Object#clone()() `

Creates and returns a copy of this object.
` boolean` ` https://developer.android.com/reference/java/lang/Object#equals(java.lang.Object)(https://developer.android.com/reference/java/lang/Object obj) `

Indicates whether some other object is "equal to" this one.
` void` ` 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 https://developer.android.com/reference/java/lang/Class<?>` ` https://developer.android.com/reference/java/lang/Object#getClass()() `

Returns the runtime class of this `Object`.
` int` ` https://developer.android.com/reference/java/lang/Object#hashCode()() `

Returns a hash code value for the object.
` final void` ` https://developer.android.com/reference/java/lang/Object#notify()() `

Wakes up a single thread that is waiting on this object's monitor.
` final void` ` https://developer.android.com/reference/java/lang/Object#notifyAll()() `

Wakes up all threads that are waiting on this object's monitor.
` https://developer.android.com/reference/java/lang/String` ` https://developer.android.com/reference/java/lang/Object#toString()() `

Returns a string representation of the object.
` final void` ` https://developer.android.com/reference/java/lang/Object#wait(long,%20int)(long timeoutMillis, int nanos) `

Causes the current thread to wait until it is awakened, typically by being *notified* or *interrupted*, or until a certain amount of real time has elapsed.
` final void` ` https://developer.android.com/reference/java/lang/Object#wait(long)(long timeoutMillis) `

Causes the current thread to wait until it is awakened, typically by being *notified* or *interrupted*, or until a certain amount of real time has elapsed.
` final void` ` https://developer.android.com/reference/java/lang/Object#wait()() `

Causes the current thread to wait until it is awakened, typically by being *notified* or *interrupted*.

## Public constructors

### WebMessageCallback

```
public WebMessageCallback ()
```

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<br />

## Public methods

### onMessage

Added in [API level 23](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public void onMessage (WebMessagePort port, 
                WebMessage message)
```

Message callback for receiving onMessage events.

<br />

| Parameters ||
|---|---|
| `port` | `WebMessagePort`: the WebMessagePort that the message is destined for <br /> |
| `message` | `WebMessage`: the message from the entangled port. <br /> |