Android自定义带进度条WebView仿微信加载过程

public class ProgressBarWebView extends WebView{}

public ProgressBarWebView(Context context) {    super(context);  }

public ProgressBarWebView(Context context, AttributeSet attrs) {    super(context, attrs);  }

public ProgressBarWebView(Context context, AttributeSet attrs,      int defStyleAttr) {    super(context, attrs, defStyleAttr);  }

//首选创建一个进度条，我们这里创建的是一个横向的进度条progressBar = new ProgressBar(context, null, android.R.attr.progressBarStyleHorizontal); //设置该进度条的位置参数progressBar.setLayoutParams(new LayoutParams(LayoutParams.FILL_PARENT, 10, 0, 0)); //我们想要设置该进度条的背景样式 Drawable drawable = context.getResources().getDrawable(R.drawable.progress_bar_states);//设置背景样式  progressBar.setProgressDrawable(drawable); //调用本身的addView（其实是调用ViewManager里的方法，看源码）方法讲进度条添加到当前布局视图中addView(progressBar); //正常想获取或这进行交互一般要实现一下两个方法，Myweblient()可以限制不用手机本身的浏览器，MyChromeClient（）可以获得网页加载的进度，title等setWebViewClient(new Myweblient()); setWebChromeClient(new MyChromeClient()); //是否可以缩放 getSettings().setSupportZoom(true); getSettings().setBuiltInZoomControls(true); 

//需要自己设置要不会打开手机浏览器  private class Myweblient extends WebViewClient{    @Override    public boolean shouldOverrideUrlLoading(WebView view, String url) {      view.loadUrl(url);      return true;    }  }

private class MyChromeClient extends WebChromeClient{    @Override     public void onProgressChanged(WebView view, int newProgress) {       if (newProgress == 100) { //当网页全部加载完毕时        progressBar.setVisibility(GONE);       } else {         if (progressBar.getVisibility() == GONE)           progressBar.setVisibility(VISIBLE);         progressBar.setProgress(newProgress);       }       super.onProgressChanged(view, newProgress);     }   }

<?xml version="1.0" encoding="utf-8"?><layer-list xmlns:android="http://schemas.android.com/apk/res/android" >  <!-- 进度条背景 -->  <item android:id="@android:id/background">     <shape>       <corners android:radius="2dp" />       <gradient         android:angle="270"         android:centerColor="#E3E3E3"         android:endColor="#E6E6E6"         android:startColor="#C8C8C8" />     </shape>   </item>   <!-- 绿色的进度值 -->  <item android:id="@android:id/progress">     <clip>       <shape>         <corners android:radius="2dp" />         <gradient           android:centerColor="#4AEA2F"           android:endColor="#31CE15"           android:startColor="#5FEC46" />       </shape>     </clip>   </item></layer-list>

//布局中<com.example.videodemo.ProgressBarWebView     android:id="@+id/ss"    android:layout_width="match_parent"    android:layout_height="match_parent"/>

ProgressBarWebView webView=(ProgressBarWebView) findViewById(R.id.ss);webView.loadUrl("http://www.baidu.com/");