How to get data from a url that returns XML or JSON in Android

Use volley Library...It will be very useful to you..here is the link for you...Download and examine that Be patience while you are doing the first time after that it will be very easy...

https://github.com/ogrebgr/android_volley_examples

or

you can use Asynctask to get the JSON data from the server.

import android.app.Activity;
import android.os.AsyncTask;
import android.os.Bundle;
import android.provider.Settings.System;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import android.view.View.OnClickListener;

public class AsyncTaskActivity extends Activity implements OnClickListener {

Button btn;

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);
    btn = (Button) findViewById(R.id.button1);
    // because we implement OnClickListener we only have to pass "this"
    // (much easier)
    btn.setOnClickListener(this);
}

public void onClick(View view) {
    // detect the view that was "clicked"
    switch (view.getId()) {
    case R.id.button1:
        new LongOperation().execute("");
        break;
    }
}

private class LongOperation extends AsyncTask<String, Void, String> {

    @Override
    protected String doInBackground(String... params) {
         String url = params[0];

        HttpClient httpClient = new DefaultHttpClient();
        HttpGet request = new HttpGet(url);           
        request.setHeader("Content-Type", "text/xml");
        HttpResponse response;
        try {
            response = httpClient.execute(request);
        } catch (ClientProtocolException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        return response;
    }

    @Override
    protected void onPostExecute(String result) {
        // Result is in String Format
        // you can use JSON api to convert into JSONObject

    }

    @Override
    protected void onPreExecute() {}

    @Override
    protected void onProgressUpdate(Void... values) {}
}

}