What is the difference b/w onReceivedHttpError and onReceivedError for WebView Client

Question

I am trying to understand the difference b/w https://developer.android.com/reference/android/webkit/WebViewClient.html

onRecievedHttpError and onRecievedError.

For me I always get both of these callbacks for all errors in my webpage? Why we have two callbacks then.

Answer 1

onReceivedError()

Report web resource loading error to the host application. These errors usually indicate inability to connect to the server.

It's about network/server errors. The errors are not HTTP errors but are unrecoverable resource errors (file not found, no network connection, server not found for the main resource, etc.). If there is a network error, there cannot be a HTTP error code transmitted.

onReceivedHttpError()

Notify the host application that an HTTP error has been received from the server while loading a resource. HTTP errors have status codes >= 400.