ps：因为我的内容是html+js一起填充的，所以不能直接打印
按照下边三个步骤就搞定了
1.
final class InJavaScriptLocalObj {
@JavascriptInterface
public void showSource(String html) {
Log.d("HTML", html);
}
}2.
webView.addJavascriptInterface(new InJavaScriptLocalObj(), "local_obj");
webView.setWebViewClient(new WebViewClient() {
@Override
public void onPageFinished(WebView view, String url) {
super.onPageFinished(view, url);
// view.loadUrl("javascript:alert(document.getElementsByTagName('html')[0].innerHTML)");
view.loadUrl("javascript:window.local_obj.showSource('<html>'+document.getElementsByTagName('html')[0].innerHTML+'</html>');");
}原文：http://blog.csdn.net/vivian8725118/article/details/46606899