Question

i am aware that the error is occurring because im trying to put a network call on the main thread so i need to use a handler or asynctask

however i dont seem to be able to get it right

this is the code im trying to get to work

 try {
                // Create a URL for the desired page
                URL url = new URL("http://darkliteempire.gaming.multiplay.co.uk/testdownload.txt");


                // Read all the text returned by the server
                BufferedReader in = new BufferedReader(new InputStreamReader(url.openStream()));
                String str;
                while ((str = in.readLine()) != null) {
                    // str is one line of text; readLine() strips the newline character(s)

                    eventText.setText(str);
                    eventText.setText(in.readLine());
                }
                in.close();
            } catch (MalformedURLException e) {
                Toast.makeText(getBaseContext(), "MalformedURLException", Toast.LENGTH_LONG).show();
            } catch (IOException e) {
                Toast.makeText(getBaseContext(), "IOException", Toast.LENGTH_LONG).show();
            }

and i want to call it when this button is clicked

public void onClick(View v) {

if (v.getId() == R.id.update) {
}
}

is anyone able to show me what i should wrap the first bit in and how to call it from the onClick

Answer 1

Something like

public class TalkToServer extends AsyncTask<String, String, String> {
    @Override
    protected void onPreExecute() {
        super.onPreExecute();
    }

    @Override
    protected void onProgressUpdate(String... values) {
        super.onProgressUpdate(values);

    }

    @Override
    protected String doInBackground(String... params) {
    //do your work here
        return something;
    }

    @Override
    protected void onPostExecute(String result) {
        super.onPostExecute(result);
           // do something with data here-display it or send to mainactivity
}

Do all heavy-lifting in doInBackground() and you can update the UI in the other 3 methods.

Here is the documentation on AsyncTask