webview 状态加载开始时显示进度条

1. requestWindowFeature(Window.FEATURE_PROGRESS);// 让进度条显示在标题栏上 
2.         setContentView(R.layout.main);   
3.         WebView webview = (WebView) findViewById(R.id.myWeb);   
4. new
5. public void onProgressChanged(WebView view, int
6. // Activity和Webview根据加载程度决定进度条的进度大小 
7. // 当加载到100%的时候 进度条自动消失 
8. this.setProgress(progress * 100);   
9.             }   
10.         });   
11. "http://www.eoeandroid.com/portal.php");