无法在Android应用程序中读取html文件标题Jsoup

Question

I am trying to parse HTML files from my local file system using Jsoup. I have created a small Android application, where the user can input filename and gets the title of the HTML file displayed in TextView. However, each time I try to get the title from the Document element, I get null. How can I fix this error? Here is my code for the button click function:

 public void onClick(View view){
        MyTask myTask = new MyTask();
        myTask.execute();
    }
lass MyTask extends AsyncTask<Void,Void,Void>{
        String title;

     @Override
        protected Void doInBackground(Void... voids) {
            Document doc = null;
            File file = new File("file:///android_asset/olx.html");

            try {
                doc = Jsoup.parse(file, "UTF-8");
            } catch (Exception e) {
                e.printStackTrace();
            }

            if (doc != null)
                title = "success" + doc.title();
            else
                title = "Error. Can't read title! ";

            return null;
        }

        @Override
        protected void onPostExecute(Void result) {
            super.onPostExecute(result);
            outputText.setText(title);
        }
    }

Answer 1

请使用这个。

 String title = doc.select("head title").text();