打算做个简单的浏览器，先从WebView开始学期。从某社区网站上搜索，抄下了一些笔记。用代码的方式记了下来，如下。

// WebView 学习笔记// 基本示例// 来自 // http://www.d-android.com/developer/forum.php?mod=viewthread&tid=11763class WebViewNote extends Activity{private WebView webView;private Handler handler = new Handler();public void onCreate(Bundle bundle){	//...	//webView = (WebView) findViewById(...)	// 载入页面	webView.loadUrl("file:///android_asset/demo.html");	// 从asset目录加载页面的语法结构如上	// 载入页面的另一种方法	// http://www.d-android.com/developer/forum.php?mod=viewthread&tid=11241	// webView.postUrl(url,postData);	// 启用Javascript功能	webView.getSettings().setJavaScriptEnabled(true);	// 当前webView打开链接	webView.setWebViewClient(new WebViewClient(){		public boolean shouldOverrideUrlLoading(WebView view,String url){			view.loadUrl(url);			return true;		}		// WebViewClient中其他可重载的方法		// http://www.d-android.com/developer/forum.php?mod=viewthread&tid=1543		public void onPageFinished(WebView view,String url){			super.onPageFinished(view,url);		}		public void onPageStarted(WebView view,String url,Bitmap favicon){			super.onPageStarted(view,url,favicon);		}		// http://www.d-android.com/developer/forum.php?mod=viewthread&tid=1569		public void onReceiveError(WebView view,int errorCode,			String description,String failingUrl){			// ...		}	});	// 有关进度的设置，标题栏显示进度	// http://www.d-android.com/developer/forum.php?mod=viewthread&tid=1569	getWindow().requestFeture(Window.FEATURE_RROGRESS);	Activity activity = this;	webView.setWebChromeClient(new WebChromeClient(){		public void onProgressChanged(WebView view,int progress){			// Activities and WebViews measure progress with different scales.			// The progress meter will automatically disappear when we reach 100%			activity.setProgress(progress * 100);		}	});	// 按Back键，后退而不退出程序	// 见onKeyDown	// 可以后退	// http://www.d-android.com/developer/forum.php?mod=viewthread&tid=1475	// webView.canGoBack();	// 与Js交互	webView.addJavascriptInterface(new Object(){		public void clickOnAndroid(){			handler.post(new Runnable(){				public void run(){					webView.loadUrl("javasript:wave()");				}			},"demo");		}	});	// 对应Html代码	/*				*/}public boolean onKeyDown(int keyCode, KeyEvent event) { 	if ((keyCode == KeyEvent.KEYCODE_BACK) && webView.canGoBack()) { 		webView.goBack(); 		return true; 	} 	return super.onKeyDown(keyCode, event); }// 另一个非常有参考意义的网址// http://www.d-android.com/developer/forum.php?mod=viewthread&tid=14219// 对WebChromeClient有较多的举例，非常好！//http://www.d-android.com/developer/forum.php?mod=viewthread&tid=15047// webView 和 js 交互的简单而清晰的说明// http://www.d-android.com/developer/forum.php?mod=viewthread&tid=23687}