com.guendouz.dzgeekhangout.OpenWeatherMapExample.java Source code

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Here is the source code for com.guendouz.dzgeekhangout.OpenWeatherMapExample.java

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/*
 * Copyright 2013 Mohamed Guendouz.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.guendouz.dzgeekhangout;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.Iterator;

import org.apache.http.HttpResponse;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;
import org.json.JSONException;
import org.json.JSONObject;

import android.app.Activity;
import android.os.AsyncTask;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;

/**
 * 
 * @author Mohamed Guendouz
 * 
 */
public class OpenWeatherMapExample extends Activity implements OnClickListener {

    private static final String WEATHER_DATA_URL = "http://api.openweathermap.org/data/2.5/weather?q=Saida,dz";

    private Button btnGetWeatherInfo;
    private EditText weatherinfo;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_open_weather_map);

        btnGetWeatherInfo = (Button) findViewById(R.id.btnGetWeatherInfo);
        weatherinfo = (EditText) findViewById(R.id.weatherInfo);
        btnGetWeatherInfo.setOnClickListener(this);

    }

    @Override
    public void onClick(View v) {
        if (v.getId() == R.id.btnGetWeatherInfo) {
            new OpenWeatherMapRequest().execute();

        }

    }

    class OpenWeatherMapRequest extends AsyncTask<Void, Void, String> {

        @Override
        protected void onPreExecute() {
            super.onPreExecute();
        }

        @Override
        protected String doInBackground(Void... params) {

            InputStream inputStream;
            BufferedReader reader;
            String jsonData = null;

            HttpClient client = new DefaultHttpClient();
            HttpGet httpGet = new HttpGet(WEATHER_DATA_URL);

            try {
                HttpResponse httpResponse = client.execute(httpGet);
                if (httpResponse.getStatusLine().getStatusCode() == 200) {
                    inputStream = httpResponse.getEntity().getContent();
                    reader = new BufferedReader(new InputStreamReader(inputStream));
                    String line = "";
                    StringBuilder builder = new StringBuilder();
                    while ((line = reader.readLine()) != null)
                        builder.append(line);

                    jsonData = builder.toString();

                }
            } catch (ClientProtocolException e) {
                e.printStackTrace();
            } catch (IOException e) {
                e.printStackTrace();
            }
            return jsonData;
        }

        @Override
        protected void onPostExecute(String result) {
            if (result != null && !result.trim().equals("")) {
                try {
                    JSONObject weatherData = new JSONObject(result);
                    Iterator<String> keysIterator = weatherData.keys();
                    StringBuilder builder = new StringBuilder();
                    while (keysIterator.hasNext()) {
                        String key = keysIterator.next();
                        builder.append(key.toUpperCase()).append(" = ").append(weatherData.get(key)).append("\n");
                    }

                    weatherinfo.setText(builder.toString());

                } catch (JSONException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }

            }
        }

    }

}