14

是的，我知道stopLoading()的文档说“停止当前负载。 ”

但是，当我尝试在加载新页面之前使用它来停止加载当前正在进行的页面时，它的行为似乎并不如预期：

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

正如您在日志中看到的那样，尽管事实上大约1 秒前WebViewClient.onPageFinished()被调用，但第一个被调用。loadUrl()WebView.stopLoading()

这是为什么？

stopLoading()究竟做了什么？

4

1 回答 1

5

you786 是对的：

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

对于他们在剩余消息中标记的 TODO，将首先得到处理。所以这导致了我只是好奇：当停止加载时

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

WebView 并没有真正停止，而是加载自己的 404 页面（如果您不调用 stopLoading()，它通常会执行此操作）：

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/
于 2012-11-07T15:51:24.000 回答