How to pass a string in AsyncTask?

Issue

So I have a URL within Method1 like so

public void Method1 (String x) {
    String Url = "http://MYURL.com/?country=" + x + "&api_key=APIKEY";
    new AsyncTaskParseJson().execute();
}

I need to pass the Url into my AsyncTask which is as follows

public class AsyncTaskParseJson extends AsyncTask<String, String, String> {

    @Override
    protected void onPreExecute() {}

    @Override
    protected String doInBackground(String... arg0)  {

        try {
            // create new instance of the httpConnect class
            httpConnect jParser = new httpConnect();

            // get json string from service url
            String json = jParser.getJSONFromUrl(ServiceUrl);

            // save returned json to your test string
            jsonTest = json.toString();

        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }

    @Override
    protected void onPostExecute(String strFromDoInBg) {
        textLastLocation = (TextView) findViewById(R.id.lastlocation);
        textLastLocation.setText(jsonTest);
    }
}

I need it so the ServiceUrl = the Url from the method. I can't figure out how to do this even from looking at other peoples questions and answers

Solution

The first parameter on AsyncTask<First, Second, Third> will define the parameter to be passed on execute(), so you define it as String and pass the url. Then:

public void Method1 (String x) {
   String Url = "http://MYURL.com/?country=" + x + "&api_key=APIKEY";
   new AsyncTaskParseJson().execute(url);
}

On your AsyncTask, you can get it on the arg0 (array), i(ndex based on the order on how you passed it on execute())

public class AsyncTaskParseJson extends AsyncTask<String, String, String> {

  @Override
  protected void onPreExecute() {}

  @Override
  protected String doInBackground(String... arg0)  {
    String url = arg0[0]; // this is your passed url
    try {
        // create new instance of the httpConnect class
        httpConnect jParser = new httpConnect();

        // get json string from service url
        String json = jParser.getJSONFromUrl(ServiceUrl);

        // save returned json to your test string
        jsonTest = json.toString();

    } catch (Exception e) {
        e.printStackTrace();
    }
    return null;
  }

  @Override
  protected void onPostExecute(String strFromDoInBg) {
    textLastLocation = (TextView) findViewById(R.id.lastlocation);
    textLastLocation.setText(jsonTest);
  }
}

Answered By - Tenten Ponce