CODEWITHSUNDEEP
javaandroidandroid-asynctask
snowparrot
snowparrot

Reputation: 297

NetworkOnMainThreadException but Using AsyncTask

I coded a class which starts a http connection for getting the text of e.g. website. I used AsyncTask but I got NetworkOnMainException. May u help me? The class

public class getXMLData extends AsyncTask<String, Void, String> {
TextView _textview;

public getXMLData(TextView textview) {
    _textview = textview;
}

protected String doInBackground(String... url)
{
    String _text = "";
    try {
        try {
            URL _url = new URL(url[0]);
            HttpURLConnection con = (HttpURLConnection) _url.openConnection();
            _text = readStream(con.getInputStream());
        }
        catch (Exception e) {
            e.printStackTrace();
        }
    }
    catch (Exception e) {
        e.printStackTrace();
    }
    return _text;
}

protected void onPostExecute(String result)
{
    _textview.setText(result.toCharArray(), 0, result.length());
}


private String readStream(java.io.InputStream in) {
    java.io.BufferedReader reader = null;
    String result = "";
    reader = new BufferedReader(new InputStreamReader(in));
    try {
        while ((reader.readLine() != null)) {
            result = result + reader.readLine();
        }
    }
    catch (java.io.IOException i)
    {

    }
    finally
    {
        try {
            reader.close();
        }
        catch (java.io.IOException e) {
            e.printStackTrace();
        }
    }
    return result;
}

Here how I start the AsyncTask:

bu_aktualize.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
          _getXMLData.doInBackground("http://www.google.de");

        }
    });

Thanks for your help.

Upvotes: 0

Views: 53

Answers (1)

CommonsWare
CommonsWare

Reputation: 1007584

You do not call doInBackground() yourself. Instead, you call execute() or executeOnExecutor() to start the AsyncTask.

You may wish to review the documentation for AsyncTask, which shows an example of setting up an AsyncTask, including a call to execute().

Upvotes: 5

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