如何使用Jsoup返回一個字符串數組？

Question

如何將使用jsoup庫提取的所有href鏈接存儲到字符串數組？

然後將它全部顯示在TextView中？

我不知道如何使用的AsyncTask與字符串數組，我也不知道如何提取從谷歌的href鏈接中做FOR LOOP。我不知道該怎麼處理，才能停止FOR LOOP。我目前的代碼只返回最後一個href鏈接。我希望有人能向我說明。我感謝你的時間！

package com.example.jsouptestarray; 

import java.io.IOException; 

import org.jsoup.Jsoup; 
import org.jsoup.nodes.Document; 
import org.jsoup.nodes.Element; 
import org.jsoup.select.Elements; 

import com.example.jsouptestarray.R; 


import android.os.AsyncTask; 
import android.os.Bundle; 
import android.app.Activity; 
import android.widget.TextView; 

public class MainActivity extends Activity { 

    TextView text; 
    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_main); 

     new MyTask().execute(); 

     } 


    private class MyTask extends AsyncTask<Void, Void, String> { 

      @Override 
      protected String doInBackground(Void... params) { 

      Document doc; 
      String linkText = ""; 

      try { 
       doc = Jsoup.connect("https://www.google.com/").get(); 
       Elements links = doc.getElementsByTag("a"); 
       for (Element el : links) { 
        linkText = el.attr("href"); 
         System.out.println("Href Found!"); 
         System.out.println("Href attribute is : "+linkText); 
       } 


      } catch (IOException e) { 
       // TODO Auto-generated catch block 
       e.printStackTrace(); 
      } 


      return linkText; 
      } 


      @Override 
      protected void onPostExecute(String result) {   
      //if you had a ui element, you could display the title 
      ((TextView)findViewById (R.id.textView2)).append (result ); 
      } 
     } 

} 

Answer 1

更改AsyncTask類爲從doInBackground返回字符串的ArrayList：

private class MyTask extends AsyncTask<Void, Void, ArrayList<String>> { 

ArrayList<String> arr_linkText=new ArrayList<String>(); 

      @Override 
      protected ArrayList<String> doInBackground(Void... params) { 

      Document doc; 
      String linkText = ""; 

      try { 
       doc = Jsoup.connect("https://www.google.com/").get(); 
       Elements links = doc.getElementsByTag("a"); 
       for (Element el : links) { 
        linkText = el.attr("href"); 
        arr_linkText.add(linkText); // add value to ArrayList 
       } 
       } catch (IOException e) { 
       // TODO Auto-generated catch block 
       e.printStackTrace(); 
      } 
      return arr_linkText;  //<< retrun ArrayList from here 
      } 


      @Override 
      protected void onPostExecute(ArrayList<String> result) {   

      // get all value from result to display in TextView 
       TextView textview=(TextView)findViewById(R.id.textView2); 
       for (String temp_result : result) { 
       System.out.println("links :: "+temp_result); 

          textview.append (temp_result +"\n"); 
      } 
      } 
     }