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WebMessageCallbackCompat

abstract class WebMessageCallbackCompat
kotlin.Any
   ↳ androidx.webkit.WebMessagePortCompat.WebMessageCallbackCompat

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 WebMessagePortCompat#setWebMessageCallback(Handler, WebMessageCallbackCompat). 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

The listener for handling MessagePort events.

Public methods
open Unit
onMessage(@NonNull port: WebMessagePortCompat, @Nullable message: WebMessageCompat?)

Message callback for receiving onMessage events.

Public constructors

<init>

WebMessageCallbackCompat()

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 WebMessagePortCompat#setWebMessageCallback(Handler, WebMessageCallbackCompat). In the latter case, the application should be extra careful for thread safety since WebMessagePort methods should be called on main thread.

Public methods

onMessage

open fun onMessage(@NonNull port: WebMessagePortCompat, @Nullable message: WebMessageCompat?): Unit

Message callback for receiving onMessage events.

Parameters
port WebMessagePortCompat: the WebMessagePort that the message is destined for
message WebMessagePortCompat: the message from the entangled port. This method is called only if WebViewFeature#WEB_MESSAGE_CALLBACK_ON_MESSAGE is supported. You can check whether that flag is supported using WebViewFeature#isFeatureSupported(String).