What does stopLoading() really do?

Question

Yes, I know the documentation for stopLoading() says "Stops the current load."

But when I try to use it to stop loading currently progressing page before loading a new one, it doesn't seem to behave as desired:

07-24 12:53:30.177: V/WebView.loadUrl: http://www.google.com
07-24 12:53:30.227: V/WebViewClient.onPageStarted: http://www.google.com

===> WebView.stopLoading() called here <====

07-24 12:53:31.917: V/WebView.loadUrl: http://www.stackoverflow.com
07-24 12:53:32.697: V/WebViewClient.onPageFinished: http://www.google.com

07-24 12:53:32.767: V/WebViewClient.onPageStarted: http://www.stackoverflow.com
07-24 12:53:33.587: V/WebViewClient.onPageFinished: http://www.stackoverflow.com

As you can see in the log, WebViewClient.onPageFinished() for the first loadUrl() gets called despite the fact that WebView.stopLoading() was called about 1 second earlier.

Why is that?

What does stopLoading() really do?

I'm guessing it just sets a flag to tell the WebView not to run any of the hooks like onPageFinished, etc. I don't think it will actually stop the network connection. — you786, Aug 02 '12 at 19:34

score 5 · Answer 1 · answered Nov 07 '12 at 15:51

you786 is right:

public void stopLoading() {
    checkThread();
    // TODO: should we clear all the messages in the queue before sending
    // STOP_LOADING?
    switchOutDrawHistory();
    mWebViewCore.sendMessage(EventHub.STOP_LOADING);
}

For that TODO they marked in the remaining messages would get processed in first. So that results in what I am just curious about: when stopping load in

WebViewClient.onReceivedError(WebView view, int errorCode, String description, String failingUrl)

The WebView does not really stops, instead it loads its own 404 Page (what it normally would do if you don't call stopLoading()):

11-07 16:30:01.112: I/MainActivity(19189): Loading: http://92.53.45.42
11-07 16:30:01.253: V/MainActivity.WebViewClient(19189): SHOULD_INTERCEPT_REQUEST: http://92.53.45.42/
11-07 16:30:01.347: V/MainActivity.WebViewClient(19189): PAGE_STARTED: http://92.53.45.42/
11-07 16:30:01.347: V/MainActivity.WebChromeClient(19189): ON_PROGRESS_CHANGED: 10
11-07 16:30:01.347: V/MainActivity.WebViewClient(19189): LOAD_RESOURCE: http://92.53.45.42/
11-07 16:30:25.292: I/GATE(19189): <GATE-M>DEV_ACTION_ERROR</GATE-M>
11-07 16:30:25.300: E/MainActivity.WebViewClient(19189): (CONNECT - Failed to connect to the server) -> http://92.53.45.42/
11-07 16:30:25.300: W/MainActivity.WebViewClient(19189): loading stopped..:
11-07 16:30:25.300: V/MainActivity.WebViewClient(19189): PAGE_STARTED: http://92.53.45.42/
11-07 16:30:25.300: I/MainActivity.WebViewClient(19189): PAGE_FINISHED: http://92.53.45.42/
11-07 16:30:25.339: I/MainActivity.WebChromeClient(19189): ON_RECEIVED_TITLE: Webseite nicht verfügbar
11-07 16:30:25.339: V/MainActivity.WebChromeClient(19189): GET_VISITED_HISTORY
11-07 16:30:25.339: I/GATE(19189): <GATE-M>DEV_ACTION_COMPLETED</GATE-M>
11-07 16:30:25.339: V/MainActivity.WebChromeClient(19189): ON_PROGRESS_CHANGED: 100
11-07 16:30:25.339: I/MainActivity.WebViewClient(19189): PAGE_FINISHED: http://92.53.45.42/

What does stopLoading() really do?

1 Answers1