Help with Jsoup usage in Android

Question

I am trying to connect to a website and pull off some specific information. I was using HTMLCleaner and xpath but it doesnt seem to support all the xpath queries I need.

I am trying to use Jsoup now, after reading the good reviews. But the problem is whenever I run the program it force closes. Following is my trial program. Please let me know where I am going wrong. (I have Internet Permission set in the manifest file).

Thank you.

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

import org.jsoup.Jsoup;
import org.jsoup.nodes.Document;
import org.jsoup.nodes.Element;
import org.jsoup.select.Elements;
import java.io.IOException;

public class jTrial extends Activity {
     /** Called when the activity is first created. */

    @Override
    public void onCreate(Bundle savedInstanceState) {
        String myString = null;     
        super.onCreate(savedInstanceState);
        setContentView(R.layout.search);
        try{
            Document doc = Jsoup.connect("http://google.com/").get();

            Elements divs = doc.select("div");

            for (Element div : divs) {
                myString=div.text();
            }
        }
        catch(IOException e){
            myString=e.getMessage();
        }
        TextView tv=new TextView(this);
        tv.setText(myString);
        //this.setContentView(tv);
    }
}

Thanks.

^ Agreed. post your log. Pretty hard to help without specific errors. — Pure Function, Jul 21 '11 at 00:35
1st broaden your exception catching (ie include Exception)... and include the null check on your textview from below 2nd the TextView has nowhere to go, ie. you have not positioned it anywhere, nor given it a place to live in your Activity's view... That in itself should not force close your app, but I thought it worth mentioning :) Also, this is not a guessing game, for us, as we know how to do this (at east, I have had success with Jsoup), so if you refuse to post the LogCat output, you will not get very far, even with a bounty... ;) — Dan, Jul 21 '11 at 14:53

score 0 · Answer 1 · edited Jan 22 '12 at 00:58

0

You should download the Jsoup jar file from http://jsoup.org/download

Create a new directory "libs" in the project directory, and copy this jar file into the libs directory. Creating the "libs" in the res folder gives an error since res Folder are only allowed to be those defined by Android. Then Right click on the project and open Build path -> configure build path. Select Libraries tab and add jars. Navigate to your project libs directory and add the Jsoup jar file. Reimport all the packages again.

edited Jan 22 '12 at 00:58

meha0250

203
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answered Jul 19 '11 at 00:12

dcanh121

4,665
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I already included the jsoup jar file in the build path. Still not working. Thanks. – user841811 Jul 20 '11 at 19:15

Nikola Despotoski · Answer 2 · 2011-07-25T01:08:58.297

You probably getting Exception when you try to (Since, you havent posted the LogCat)

    for (Element div : divs) 
    {
       myString=myString+" " +div.text();  //if it was like you did, than you'll see only the last element or use div.getElementsByTag("div"); 
    }
    TextView tv=new TextView(this);
            tv.setText(myString);

If you want to parse the <divs from the html probably you should use div.getElementsByTag("div") because you are searching for HTML tag and then parsing. Either you get the TextView wrong or your myString is null (might be NullPointerException).

Try rewriting that part like (I hope you have TextView in your search.xml)

TextView tv=(TextView)findViewById(R.id.yourTextView);
if(myString!=null)  // if it is null you'll know that something with the Jsoup isnt right
{
       tv.setText(myString);
}else { 
tv.seText("myString is null");
}

Help with Jsoup usage in Android

2 Answers2