Android--当webview加载网页的时候在标题栏上显示加载进度

public class ProgressTest extends Activity{ final Activity context = this; @Override public void onCreate(Bundle b) { super.onCreate(b); requestWindowFeature(Window.FEATURE_PROGRESS);//让进度条显示在标题栏上 setContentView(R.layout.main); WebView webview = (WebView)findViewById(R.id.webview); webview.setWebChromeClient(new WebChromeClient() { public void onProgressChanged(WebView view, int progress) { //Activity和Webview根据加载程度决定进度条的进度大小 //当加载到100%的时候 进度条自动消失 context.setProgress(progress * 100); } }); webview.loadUrl(url); }