MainActivity

package info.rekayasa.owm;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import net.aksingh.owmjapis.CurrentWeather;
import net.aksingh.owmjapis.OpenWeatherMap;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import android.app.Activity;
import android.os.AsyncTask;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;


public class MainActivity extends Activity {
    List<String> list = new ArrayList<String>();
    TextView tvCity, tvTemperature, tvDescription;
    EditText etCity;
    Button btnGet;
    String cityName;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        tvCity = (TextView) findViewById(R.id.tvCity);
        tvTemperature = (TextView) findViewById(R.id.tvTemperature);
        tvDescription = (TextView) findViewById(R.id.tvDescription);
        etCity = (EditText) findViewById(R.id.etCity);
        btnGet = (Button) findViewById(R.id.btnGet);
        btnGet.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                tvCity.setText("");
                tvTemperature.setText("");
                tvDescription.setText("");

                cityName = etCity.getText().toString();
                new MyOwm().execute();
                etCity.setText("");
            }
        });
    }


    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();
        if (id == R.id.action_settings) {
            return true;
        }
        return super.onOptionsItemSelected(item);
    }

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

        @Override
        protected String doInBackground(Void... params) {
            OpenWeatherMap owm = new OpenWeatherMap("");
            CurrentWeather cwd;
            try {
                cwd = owm.currentWeatherByCityName(cityName);
                list.clear();
                // checking data retrieval was successful or not
                if (cwd.isValid()) {
                    // checking if city name is available
                    if (cwd.hasCityName()) {
                        //printing city name from the retrieved data
                        String cwdRaw = cwd.getRawResponse();
                        JSONObject json = new JSONObject(cwdRaw);
                        JSONArray weatherlist = json.getJSONArray("weather");
                        JSONObject c = weatherlist.getJSONObject(0);
                        String description = c.getString("description");
                        System.out.println("Rawresponse: " + cwdRaw);
                        System.out.println("Description: " + description);
                        System.out.println("City: " + cwd.getCityName());
                        list.add(cwd.getCityName());
                        list.add(description);
                    }

                    // checking if max. temp. and min. temp. is available
                    if (cwd.getMainInstance().hasMaxTemperature() && cwd.getMainInstance().hasMinTemperature()) {
                        // printing the max./min. temperature
                        list.add(String.valueOf(cwd.getMainInstance().getMaxTemperature()));
                        list.add(String.valueOf(cwd.getMainInstance().getMinTemperature()));
                        System.out.println("Temperature: " + cwd.getMainInstance().getMaxTemperature()
                                    + "/" + cwd.getMainInstance().getMinTemperature() + "\'F");
                    }
                }

            } catch (IOException e) {
                e.printStackTrace();
            } catch (JSONException e) {
                e.printStackTrace();
            }
            return null;
        }

        @Override
        protected void onPostExecute(String result) {
            super.onPostExecute(result);
            tvCity.setText(list.get(0));
            tvDescription.setText(list.get(1));
            tvTemperature.setText(list.get(2)+"/"+list.get(3)+"\'F");
        }

    }
}