Jsoup無法正確獲取HTML（？）

Question

好的，我使用Jsoup從網站上下載了一些html，並試圖將所說的html放在listview中。 該應用程序編譯沒有錯誤，但是當我單擊按鈕時，列表視圖為空。 這（imo）可能是由於以下事實：我沒有正確實現jsoup代碼，並且沒有下載html，或者即使正確下載了html，也沒有正確地將其添加到listview中（是的，我已經實現了互聯網許可）。 這是我的代碼：

package davidgb.baseballspain;
import android.os.AsyncTask;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.Button;
import android.widget.ListView;
import android.widget.TextView;
import org.jsoup.Jsoup;
import org.jsoup.nodes.Document;
import org.jsoup.select.Elements;

public class MainActivity extends AppCompatActivity {
@Override

protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    Button but1 = (Button) findViewById(R.id.but);
    but1.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View v) {
            new doit().execute();
        }
    });}

public class doit extends AsyncTask<Void, Void, Void> {
ListView lista = (ListView)findViewById(R.id.lista);
    String result1;
    String result2;
    String result3;
    String result4;
    String result5;
    String result6;

    String[] resultsizq = {result1, result3, result5,};
    String[] resultsder = {result2, result4, result6,};

    @Override
    protected void onPostExecute(Void aVoid) {
       CustomAdapter customAdapter = new CustomAdapter();
       lista.setAdapter(customAdapter);
   }

    Class CustomAdapter extends BaseAdapter{
       @Override
        public int getCount() {
            return resultsizq.length;
        }
        @Override
       public Object getItem(int position) {
            return null;
        }
        @Override
        public long getItemId(int position) {
            return 0;
        }
        @Override
        public View getView(int position, View view, ViewGroup parent) {
            view = getLayoutInflater().inflate(R.layout.customlayout,null);

            TextView resultsiz= (TextView)view.findViewById(R.id.resultsiz);
            TextView resultsde= (TextView)view.findViewById(R.id.resultsde);


            resultsiz.setText(resultsizq[position]);
            resultsde.setText(resultsder[position]);

           return view;
        }
    }



    protected Void doInBackground(Void... params) {

        try {

            Document doc = Jsoup.connect("http://www.rfebs.es/estadisticas/2017/liga/B_res.php").get();


            Elements result = doc.getElementsByClass("bianco_me");

            if (result.size() > 0) {

                result1 = result.get(1).text();

                result2 = result.get(2).text();

                result3 = result.get(3).text();

                result4 = result.get(4).text();

                result5 = result.get(5).text();

                result6 = result.get(6).text();

            }



        } catch (Exception e) {

            e.printStackTrace();
        }

        return null;
    }

}}

Answer 1

我使用以下Java代碼檢索網站徽標

@Override
        protected Void doInBackground(Void... params) {
            try {
// Connect to the web site
                Document document = Jsoup.connect(url).get();
// Using Elements to get the class data
                Elements img = document.select("div[class=header-logo] a[title=AndroidBegin] img[src]");
// Locate the src attribute
                String imgSrc = img.attr("src");
// Download image from URL
                InputStream input = new java.net.URL(imgSrc).openStream();
// Decode Bitmap
                bitmap = BitmapFactory.decodeStream(input);
            } catch (IOException e) {
                e.printStackTrace();
            }
            return null;
        }

網站源代碼為

<div class="header-logo"><a href="http://www.androidbegin.com/" rel="home" title="AndroidBegin"><img src="http://www.androidbegin.com/wp-content/uploads/2013/04/Web-Logo.png" alt="AndroidBegin" class="header-logo" /></a></div>         
    </div><!-- $header_logo_align -->