参考：http://www.cnblogs.com/hubli/p/4835549.html

APP会跳转网页时候，请参考：http://blog.csdn.net/raphael55/article/details/6975918

效果图：

1.wevbview_progressbar.xml

2.ProgressWebView.java

@SuppressWarnings("deprecation") public class ProgressWebView extends WebView {
      private final static String TAG = ProgressWebView.class.getSimpleName(); private ProgressBar progressBar; private Context context; public ProgressWebView(Context context, AttributeSet attrs) { super(context, attrs); this.context = context; progressBar = new ProgressBar(context, null, android.R.attr.progressBarStyleHorizontal); progressBar.setLayoutParams(new AbsoluteLayout.LayoutParams(AbsoluteLayout.LayoutParams.MATCH_PARENT, 3, 0, 0)); progressBar.setProgressDrawable(getResources().getDrawable(R.drawable.wevbview_progressbar)); addView(progressBar); setWebChromeClient(new WebChromeClient()); } public class WebChromeClient extends android.webkit.WebChromeClient { @Override public void onProgressChanged(WebView view, int newProgress) { Log.d(TAG, "newProgress" + newProgress); if (newProgress == 100) { progressBar.setVisibility(GONE); } else { if (progressBar.getVisibility() == GONE) progressBar.setVisibility(VISIBLE); progressBar.setProgress(newProgress); } super.onProgressChanged(view, newProgress); } // 处理javascript中的console.log @Override public boolean onConsoleMessage(ConsoleMessage cm){ android.util.Log.d(TAG, "webview console " + cm.lineNumber() + " of " + cm.sourceId() + " : " + cm.message()); return true; } // 处理javascript中的alert() @Override public boolean onJsAlert(WebView view, String url, String message, JsResult result) { result.cancel(); return true; } } @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); } }

3.MainActivity.java

ProgressWebView webView = (ProgressWebView)findViewById(R.id.them_webview);

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("http://www.cnblogs.com/hubli/p/4835549.html");

4.activity_main.xml