Question

I’ve been trying to fix this problem almost all day (or it feels like that), and I really can’t do it myself. So I hope you can help.

First of all, I have a button that is clicked – when that happens, a txt file from the internet is read and saved in a String. While this is going on, a ProcessDialog appears to show that the file is retrieved.

In the code below you’ll see a TextView called tv2, it is purely implemented for testing purposes.

@Override
public void onCreate(Bundle savedInstanceState)
{
    super.onCreate(savedInstanceState);
    setContentView(R.layout.music);

    final TextView tv2 = (TextView)findViewById(R.id.textView1);
    Button btnMusicAll = (Button)findViewById(R.id.btnMusicAll);
    btnMusicAll.setOnClickListener(new OnClickListener()
    {
        public void onClick(View v)
        {
            String wait = getString(R.string.pleaseWait);
            String retrievingInfo = getString(R.string.retrievingInfo);                             

            getReleaseInfoProgressDialog = ProgressDialog.show(Music.this, wait, retrievingInfo, true);

            new Thread()
            {
                public void run()
                {
                    try
                    {
                        headers = getStringFromUrl(getString(R.string.rlsHeaderURL));
                        setHeaders(headers,tv2);
                    }
                    catch(Exception e)
                    {
                        String error = getString(R.string.error0x01);
                        MessageShort(error);
                    }

                    // Remove progress dialog
                    getReleaseInfoProgressDialog.dismiss();
                }
            }.start();              
        }
    });
}

And the method setHeaders:

public void setHeaders(final String hdr, final TextView tv)
{       
    try
    {
        runOnUiThread(
                new Runnable()
                {
                    public void run()
                    {                           
                            tv.setText(hdr);
                    }
                });
    }           
    catch(Exception e)
    {
        e.printStackTrace();
    }
}

Now, I want to be able to use the String ‘headers’. Because I want to split it up and use it afterwards.
For example, I have been trying to expand the public void run() method above to the following:

public void run()
{                           
    tv.setText(hdr);
    hej = hdr.split("\n");
    MessageShort(hej[1]);
}

MessageShort is simply a Toast method that takes a String as parameter.
‘hej’ is declared as:

public String[] hej = {};

If ‘hdr’ (‘headers’) is “text01\ntext02\ntext03”, ‘hej’ would be hej[0]=text01, hej[1]=text02, etc.

This also works ok, a Toast message appears stating “text02” for hej[1].

The real problem here is the fact that I can not use ‘hej’ or ‘headers’ outside these running threads. For example, if I – after the method btnMusicAll.setOnClickListener – write the same MessageShort statement (MessageShort(hej[1]);) – the application crashes! It also crashes if I try to use ‘headers’ somehow.

Please help.

Answer 1

Closing.

I managed to make it work, but not sure if it’s the best way to do it.

I use AsyncTask, and after I’ve dismissed the ProgressDialog in the onPostExecute method, I use the putExtra method for the Intent in which I need the String (that was retrieved from the internet). I’m sure this would work too in my old code above (without the use of AsyncTask).