你好我正在使用這個例子http://lexandera.com/2009/01/extracting-html-from-a-webview/從webview中獲取HTML。但我需要在我的超類中使用它,我不知道如何做到這一點。我只能看到AlertDialog上的html,但我不能使用它。我怎樣才能返回到我的主類作爲字符串?來自webview的android html代碼
final Context myApp = this;
/* An instance of this class will be registered as a JavaScript interface */
class MyJavaScriptInterface
{
@SuppressWarnings("unused")
public void showHTML(String html)
{
new AlertDialog.Builder(myApp)
.setTitle("HTML")
.setMessage(html)
.setPositiveButton(android.R.string.ok, null)
.setCancelable(false)
.create()
.show();
}
}
final WebView browser = (WebView)findViewById(R.id.browser);
/* JavaScript must be enabled if you want it to work, obviously */
browser.getSettings().setJavaScriptEnabled(true);
/* Register a new JavaScript interface called HTMLOUT */
browser.addJavascriptInterface(new MyJavaScriptInterface(), "HTMLOUT");
/* WebViewClient must be set BEFORE calling loadUrl! */
browser.setWebViewClient(new WebViewClient() {
@Override
public void onPageFinished(WebView view, String url)
{
/* This call inject JavaScript into the page which just finished loading. */
browser.loadUrl("javascript:window.HTMLOUT.showHTML('<head>'+document.getElementsByTagName('html')[0].innerHTML+'</head>');");
}
});
/* load a web page */
browser.loadUrl("http://lexandera.com/files/jsexamples/gethtml.html");
這與在示例中用Toast替換AlertDialog是一樣的。我只想在主類中的webView.loadUrl之後訪問html字符串,而不是在類JavaScriptInterface中。 script.loadhtml(); //// class JavaScriptInterface {public string loadhtml(){return html}}但不起作用 –