webview正常加載iframe標籤下的視頻

mWebview = (WebView) inflate.findViewById(R.id.wb);
WebSettings webSettings = mWebview.getSettings();
// 設置WebView屬性，能夠執行Javascript腳本
webSettings.setJavaScriptEnabled(true);
webSettings.setPluginState(WebSettings.PluginState.ON);// 可以使用插件
webSettings.setLayoutAlgorithm(WebSettings.LayoutAlgorithm.NARROW_COLUMNS);
mWebview.loadDataWithBaseURL(null,mExt.getTutorial(), "text/html",  "utf-8", null);