webview是android比較重要和常用的控制元件，網路上很多相關內容，在此介紹下WebViewClient比較少見的操作：

我們獲取WebView裡面連結別的網頁的url地址

private class MyWebViewClient extends WebViewClient {
		@Override
		public boolean shouldOverrideUrlLoading(WebView view, String url) {

			return true;  //返回true才能在當前WebView顯示url連結內容，否則會開啟其它瀏覽器
		}

		@Override
		public void onPageStarted(WebView view, String url, Bitmap favicon) {
			super.onPageStarted(view, url, favicon);
			initCollectionImageBtn(url);
			//1、 view.getOriginalUrl()初始載入為空null，此後該值==view.getUrl() != url
			// 2、並且url等於onPageFinished的值

			imgButtonFresh.setImageDrawable(getResources().getDrawable(
					R.drawable.selector_nav_to_refresh_stop));
		}

		@Override
		public void onPageFinished(WebView view, String url) { // view.getOriginalUrl() == view.getUrl() == url
			if (isCollection) {
				changeCollectionImgBg(COLLECTION_SATE_AFTER);
			} else {
				changeCollectionImgBg(COLLECTION_SATE_BEFORE);
			}
			imgButtonFresh.setImageDrawable(getResources().getDrawable(
					R.drawable.selector_nav_to_refresh));
			view.loadUrl("javascript:" + handleWebViewHeader(url));
			super.onPageFinished(view, url);
		}

		@Override
		public void onReceivedError(WebView view, int errorCode,
				String description, String failingUrl) {
			super.onReceivedError(view, errorCode, description, failingUrl);
		}
	}
 

        "document.body.removeChild(document.getElementsByTagName(\"header\")[0])";

或者 "document.body.removeChild(document.getElementsByClassName(\"header\")[0])";