布局：

进度条样式：

进度图片：

代码：

public class WebChromeClient extends android.webkit.WebChromeClient {  @Override  public void onProgressChanged(WebView view, int newProgress) {   if (newProgress == 100) {    mProgressBar.setVisibility(GONE);   } else {    if (mProgressBar.getVisibility() == GONE)     mProgressBar.setVisibility(VISIBLE);    mProgressBar.setProgress(newProgress);   }   super.onProgressChanged(view, newProgress);  } } @Override protected void onScrollChanged(int l, int t, int oldl, int oldt) {  LayoutParams lp = (LayoutParams) mProgressBar.getLayoutParams();  lp.x = l;  lp.y = t;  mProgressBar.setLayoutParams(lp);  super.onScrollChanged(l, t, oldl, oldt); }}