我正在尝试学习Android,当我尝试使用Jsoup解析HTML时,我收到错误,我的应用停止了。我的布局中有一个按钮,当我点击它时,我希望应用程序更新TextView并编写HTML页面标题。这是代码(必要部分):
public void onClick(View arg0) {
// TODO Auto-generated method stub
new Title().execute(new String[] {url}); // I have url of an html address as a string above
}
}
class Title extends AsyncTask <String, Void, String> {
String pageTitle;
protected String doInBackground(String... params) {
try {
Document doc = Jsoup.connect(params[0]).get();
pageTitle = doc.title();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return pageTitle;
}
protected void onPostExecute (String... params) {
MainActivity.title.setText(params[0]);
}
}
当我点击按钮时,它会显示&#34;不幸的是,App已停止。&#34;
有谁能告诉我我做错了什么?
答案 0 :(得分:0)
在doInBackground()中尝试:
{
String pageTitle;
Element ele;
protected String doInBackground(String... params) {
try {
Document doc = Jsoup.connect(params[0]).get();
t =doc.select("title");
pageTitle = t.text();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return pageTitle;
}