android 获取WebView的网页高度

wv.getSettings().setJavaScriptEnabled(true);wv.addJavascriptInterface(new HeightGetter(), "jo");wv.setWebViewClient(new WebViewClient() {public boolean shouldOverrideUrlLoading(WebView view, String url) {return false;}public void onPageFinished(WebView view, String url) {wv.loadUrl("javascript:window.jo.run(document.documentElement.scrollHeight+'');");}});wv.loadUrl("http://www.baidu.com");

private class HeightGetter {@JavascriptInterfacepublic void run(final String height) {runOnUiThread(new Runnable() {public void run() {Toast.makeText(getApplicationContext(), height, 0).show();}});}}