Android WebViewClient 处理跳转URL

	webView = (WebView) findViewById(R.id.webview);
	webView.setWebViewClient(new ExampleWebViewClient());
	private class ExampleWebViewClient extends WebViewClient {
		@Override
		public void onReceivedSslError(WebView view, SslErrorHandler handler, SslError error) {
			handler.proceed();
		}

		@Override
		public boolean shouldOverrideUrlLoading(WebView view, String url) {
			view.loadUrl(url);
			return true;
		}

		@Override
		public void onPageFinished(WebView view, String url) {
			super.onPageFinished(view, url);
		}

		@Override
		public void onPageStarted(WebView view, String url, Bitmap favicon) {
			super.onPageStarted(view, url, favicon);
		}

		@Override
		public void onLoadResource(WebView view, String url) {
			super.onLoadResource(view, url);
		}
	}

官方注释：Give the host application a chance to take over the control when a new url is about to be loaded in the current WebView. If WebViewClient is not provided,by default WebView will ask Activity Manager to choose the proper handler for the url. If WebViewClient is provided, return true means the host application handles the url, while return false means the current WebView handles the url. This method is not called for requests using the POST "method".

		/**
		 * 所有以www.example.com开头的url调用系统浏览器打开 其他的url在当前webview打开
		 */
		@Override
		public boolean shouldOverrideUrlLoading(WebView view, String url) {
			if (url.indexOf("http://www.example.com") != -1) {
				// 调用系统默认浏览器处理url
				view.stopLoading();
				view.getContext().startActivity(new Intent(Intent.ACTION_VIEW, Uri.parse(url)));
				return true;
			}
			return false;
		}

官方注释：Give the host application a chance to handle the key event synchronously. e.g. menu shortcut key events need to be filtered this way. If return true, WebView will not handle the key event. If return false, WebView will always handle the key event, so none of the super in the view chain will see the key event. The default behavior returns false.

官方注释：Notify the host application that a page has started loading. This method is called once for each main frame load so a page with iframes or framesets will call onPageStarted one time for the main frame. This also means that onPageStarted will not be called when the contents of an embedded frame changes, i.e. clicking a link whose target is an iframe.

官方注释：Notify the host application that a page has finished loading. This method is called only for main frame. When onPageFinished() is called, the rendering picture may not be updated yet. To get the notification for the new Picture, use onNewPicture(WebView, Picture).

		// 获取页面加载时间
		private long startTime;
		private long endTime;
		private long spendTime;
		
		@Override
		public void onPageFinished(WebView view, String url) {
			endTime = System.currentTimeMillis();
			spendTime = endTime - startTime;
			Toast.makeText(view.getContext(), "spend time is:" + spendTime, Toast.LENGTH_SHORT).show();
		}

		@Override
		public void onPageStarted(WebView view, String url, Bitmap favicon) {
			startTime = System.currentTimeMillis();
		}

官方注释：Notify the host application that the WebView will load the resource specified by the given url.

		@Override
		public void onLoadResource(WebView view, String url) {
			if (url.indexOf("http://www.example.com") != -1 && view != null) {
				view.stopLoading();
				view.getContext().startActivity(new Intent(Intent.ACTION_VIEW, Uri.parse(url)));
			}			
		}