Cannot display ArrayList<String> within android

Question

I'm trying to display simple text I retrieve from a URL. This code works fine if I run it using System.out.println() to the java console, but when I change to Android, no text is displayed. Since I can get text to display if I hard code a string in setText, I assume my problem is in ArrayList. Thank you in advance for your help.

onCreate

try {

    ArrayList<String> myData = new ArrayList<String>();
    LinearLayout lView = new LinearLayout(this);
    TextView myText = new TextView(this);

    BufferedReader br = null;       
    URL url;

    url = new URL("URL to plain text");
    br = new BufferedReader(new InputStreamReader(url.openStream()));
    String inputLine;

    while ((inputLine = br.readLine()) != null) {
        myData.add(inputLine);
    }

    br.close();

    myText.setText(myData.get(1));
    lView.addView(myText);
    setContentView(lView);


} catch (IOException e) {
    e.printStackTrace();
}

I hope this is prototype code, otherwise please seperate at least UI and file IO. — tilpner
– tilpner, Commented Apr 25, 2014 at 16:07
myText.setText(myData.get(1)); can't do that on a background thread. — njzk2
– njzk2, Commented Apr 25, 2014 at 16:08
and you know for a fact that myData.get(1) contains something because you logged it? — njzk2
– njzk2, Commented Apr 25, 2014 at 16:12

Denis Kulagin · Accepted Answer · 2014-04-25 16:07:54Z

1

Do it that way:

myText.setText(Arrays.toString(myData.toArray(new String[myData.size()])));

It'll print the whole contents of myData.

answered Apr 25, 2014 at 16:07

Denis Kulagin

9,04919 gold badges73 silver badges139 bronze badges

Sign up to request clarification or add additional context in comments.

3 Comments

njzk2 Over a year ago

not relevant to the question. the question is not the get the content of myData, as logging to sysout apparently works.

Denis Kulagin Over a year ago

@njzk2 I can't say, if myData.get(1) is not an empty String. So it might help to solve the problem.

heLL0 Over a year ago

thanks for that comment Denis. It is relevant to the question that I have. Ironically @njzk2 made a snarky comment on my question as well.

Collectives™ on Stack Overflow

Cannot display ArrayList<String> within android

1 Answer 1

3 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

3 Comments

Your Answer

Sign up or log in

Post as a guest

Related