【Android】带进度条的WebView

/**
 * 带进度条的WebView
 *  @author  农民伯伯
 *  @see   http://www.cnblogs.com/over140/archive/2013/03/07/2947721.html
 * 
  */
@SuppressWarnings("deprecation")
public  class ProgressWebView  extends WebView {

     private ProgressBar progressbar;

     public ProgressWebView(Context context, AttributeSet attrs) {
         super(context, attrs);
        progressbar =  new ProgressBar(context,  null, android.R.attr.progressBarStyleHorizontal);
        progressbar.setLayoutParams( new LayoutParams(LayoutParams.FILL_PARENT, 3, 0, 0));
        addView(progressbar);
         //         setWebViewClient(new WebViewClient(){});
        setWebChromeClient( new WebChromeClient());
    }

     public  class WebChromeClient  extends android.webkit.WebChromeClient {
        @Override
         public  void onProgressChanged(WebView view,  int newProgress) {
             if (newProgress == 100) {
                progressbar.setVisibility(GONE);
            }  else {
                 if (progressbar.getVisibility() == GONE)
                    progressbar.setVisibility(VISIBLE);
                progressbar.setProgress(newProgress);
            }
             super.onProgressChanged(view, newProgress);
        }

    }

    @Override
     protected  void onScrollChanged( int l,  int t,  int oldl,  int oldt) {
        LayoutParams lp = (LayoutParams) progressbar.getLayoutParams();
        lp.x = l;
        lp.y = t;
        progressbar.setLayoutParams(lp);
         super.onScrollChanged(l, t, oldl, oldt);
    }
}

/**
 * 加载网页的Activity
 * 
 *  @author  农民伯伯
 *  @see   http://www.cnblogs.com/over140/archive/2013/03/07/2947721.html
 * 
  */
public  class WebActivity  extends BaseActivity {

     private ProgressWebView webview;
     private String url;
     private String name;

    @Override
     protected  void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
        setContentView(R.layout.commom_web);

         //  ~~~ 获取参数
        url = getIntent().getStringExtra("url");
        name = getIntent().getStringExtra("name");

         //  ~~~ 绑定控件
        webview = (ProgressWebView) findViewById(R.id.webview);

         //  ~~~ 设置数据
        titleText.setText(name);
        webview.getSettings().setJavaScriptEnabled( true);
        webview.setDownloadListener( new DownloadListener() {
            @Override
             public  void onDownloadStart(String url, String userAgent, String contentDisposition, String mimetype,  long contentLength) {
                 if (url !=  null && url.startsWith("http://"))
                    startActivity( new Intent(Intent.ACTION_VIEW, Uri.parse(url)));
            }
        });

        webview.loadUrl(url);
    }
}

<? xml version="1.0" encoding="utf-8" ?>
< LinearLayout  xmlns:android ="http://schemas.android.com/apk/res/android"
    android:layout_width ="fill_parent"
    android:layout_height ="fill_parent"
    android:orientation ="vertical"   >

     < include  layout ="@layout/include_title"   />

     < com.nmbb.ui.widget.ProgressWebView
         android:id ="@+id/webview"
        android:layout_width ="fill_parent"
        android:layout_height ="fill_parent"   />

</ LinearLayout >