WebMessageCallbackCompat

Kotlin |Java

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
<init>() 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.

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).

Parameters
port	WebMessagePortCompat: the WebMessagePort that the message is destined for
message	WebMessageCompat?: the message from the entangled port.