rpi.rpiface.PostAsyncTask.java Source code

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Here is the source code for rpi.rpiface.PostAsyncTask.java

Source

package rpi.rpiface;

import java.io.IOException;
import java.util.LinkedList;
import java.util.List;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.message.BasicNameValuePair;

import android.content.Context;
import android.os.AsyncTask;
import android.util.Log;
import android.widget.Toast;

/**
 * Copyright (C) 2013 Javier Garca, Julio Alberto Gonzlez
 * <p>
 * This file is part of Rpi-Face. Rpi-Face is free software: you can
 * redistribute it and/or modify it under the terms of the GNU General Public
 * License as published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 * <p>
 * Rpi-Face is distributed in the hope that it will be useful, but WITHOUT ANY
 * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
 * A PARTICULAR PURPOSE. See the GNU General Public License for more details.
 * <p>
 * You should have received a copy of the GNU General Public License along with
 * Rpi-Face. If not, see <http://www.gnu.org/licenses/>.
 * <p>
 * <p>
 * Actividad que se encarga de hacer un post al servidor
 * 
 * @author Francisco Javier Garca Gmez y Julio Alberto Gonzlez Marn
 * @version 1.0
 * @since 2013-03-26
 * 
 */

public class PostAsyncTask extends AsyncTask<String, Void, Boolean> {
    /**
     * Etiqueta del log
     */
    private static final String LOGTAG = PostAsyncTask.class.getCanonicalName();
    /**
     * Contexto de la aplicacin
     */
    private Context context;

    /**
     * Crea un nuevo PostAsyncTask.
     * 
     * @param context
     *            Contexto de la aplicacin.
     */
    public PostAsyncTask(Context context) {
        this.context = context;
    }

    /**
     * Se ejecuta al principio
     */
    protected void onPreExecute() {
        Log.i(LOGTAG + " Asynctask", "Async iniciada");
    }

    /**
     * Se ejecuta en paralelo sin bloquear el sistema
     * 
     * @param param
     *            Array de parmetros: el primero se corresponde con el texto a
     *            envir, el segundo con la direccin, el tercero con el puerto y
     *            el cuarto con el path
     */
    protected Boolean doInBackground(String... param) {
        // Se asignan variables a los parmetros del asynctask
        String value = param[0];
        String rpi = param[1];
        String port = param[2];
        String rpiPath = param[3];
        String rpiParam = param[4];
        // Se crea un cliente http
        HttpClient httpClient = new DefaultHttpClient();
        // Se crea la url
        String url = rpi + ":" + port + rpiPath;
        // Se crea un objeto httpPost
        HttpPost httpPost = new HttpPost(url);
        // Se crea una lista con los parmetros
        List<NameValuePair> params = new LinkedList<NameValuePair>();
        params.add(new BasicNameValuePair(rpiParam, value));

        // String paramString = URLEncodedUtils.format(params, "iso-8859-15");
        Log.i(LOGTAG + " Asynctask" + " Http get:", url);

        try {
            // Se le pasan los parmetros debidamente formateados al httpPost
            httpPost.setEntity(new UrlEncodedFormEntity(params, "iso-8859-15"));
            // Se ejecuta el cliente pasndole como parmetro la peticin post.
            HttpResponse response = httpClient.execute(httpPost);
            Log.i(LOGTAG + " Asynctask" + " Http Response:", response.toString());
        } catch (ClientProtocolException e) {
            e.printStackTrace();
            return false;
        } catch (IOException e) {
            e.printStackTrace();
            return false;
        }
        return true;
    }

    /**
     * Se ejecuta al final
     * 
     * @param result
     *            Resultado de la tarea en segundo plano.
     */
    protected void onPostExecute(Boolean result) {
        Log.i(LOGTAG + " Asynctask", "Async terminada");
        if (!result) {
            Toast.makeText(context, "Hubo problemas con el servidor. Reintntelo ms tarde.", Toast.LENGTH_SHORT)
                    .show();
        } else {
            Toast.makeText(context, "Enviado correctamente.", Toast.LENGTH_SHORT).show();
        }
    }

}