Android Open Source - Alkomer Login Async Task

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Back to project page Alkomer.
License

The source code is released under:
MIT License
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Java Source Code

package cz.jmx.tomik.alkomer.android.threads;
/*  w ww.j a v  a 2  s .c  o m*/
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLConnection;
import java.util.ArrayList;
import java.util.Date;

import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

import android.app.Activity;
import android.app.AlertDialog;
import android.app.Dialog;
import android.app.ProgressDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.SharedPreferences;
import android.content.SharedPreferences.Editor;
import android.os.AsyncTask;
import android.preference.PreferenceManager;
import android.util.Log;
import android.widget.Toast;
import cz.jmx.tomik.alkomer.android.DashboardActivity;
import cz.jmx.tomik.alkomer.android.R;
import cz.jmx.tomik.alkomer.android.database.DataHelper;
import cz.jmx.tomik.alkomer.android.drinks.Glass;
import cz.jmx.tomik.alkomer.android.models.User;
import cz.jmx.tomik.alkomer.android.tools.DataTime;

/**
 * Alkomer - Server App
 * --------------------
 * Login ASyncTask
 *
 * @copyright   Copyright (c) 2011 Tomas Vitek
 * @author      Tomas Vitek ~ http://tomik.jmx.cz

 * @package     Alkomer
 * @version     1.0
 */
public class LoginAsyncTask extends AsyncTask<String[], Void, StringBuffer> {
  
  protected Context context;
  protected Activity activity;
  protected String email, password;
  protected ProgressDialog dialog;
  
  public LoginAsyncTask(Activity activity, ProgressDialog dialog) {    
    this.context = activity.getApplicationContext();
    this.activity = activity;
    this.dialog = dialog;
  }

  @Override
  protected StringBuffer doInBackground(String[]... arg0) {
    
    email = arg0[0][0];
    password = arg0[0][1];
    
    User user = new User(email, password);
    
    URL url = null;
        
    try {
      url = new URL("https://"+context.getResources().getString(R.integer.apiVersion)+".alko-mer.appspot.com/load?email="+user.getEmail()+"&password="+user.getPassword()+"&hashcode="+user.hashCode());
    } catch (MalformedURLException e) {
      Log.e("Login Error", e.getMessage());
    }
    
        URLConnection conn = null;
        
        StringBuffer bf = new StringBuffer();
        
    try {
      conn = url.openConnection();
      BufferedReader rd = new BufferedReader(new InputStreamReader(conn.getInputStream()));
      String line = "";
      
      while ((line = rd.readLine()) != null) {
        bf.append(line);
      }
    } catch (IOException e) {
      Log.e("Login Error", e.getMessage());
    }
    
    return bf;
    
  }
  
  protected void onPostExecute(StringBuffer sb) {
    
    if (sb.toString().equals("0")) {      
      dialog.dismiss();
      Toast.makeText(context, "U?ivatel neexistuje nebo bylo zad?no ?patn? heslo!", Toast.LENGTH_LONG).show();      
    } else {
      
      ArrayList<Glass> list = new ArrayList<Glass>();
      
      final DataHelper db = new DataHelper(context);
      
      db.deleteAll();
      
      try {
        JSONObject json = new JSONObject(sb.toString());
        int weight = json.getInt("weight");
        String gender = json.getString("gender");
        
        json = (JSONObject) json.getJSONObject("drinks");        
        JSONArray ids = json.names();
        
        if (ids != null) {        
          for (int i=0; i < ids.length(); i++) {          
            JSONObject obj = (JSONObject) json.getJSONObject(ids.optString(i));
            int id = obj.getInt("id");
            String _time = obj.getString("time");
            Date time = DataTime.convertFromStringToDate(_time, context);
            
            Glass g = new Glass(time, id);
            list.add(g);
            
            db.insert(time, id);          
          }
        }
        
        SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context);
          Editor editor = prefs.edit();
          editor.putString("email", email);
          editor.putString("password", password);
          editor.putInt("weight", weight);
          editor.putString("gender", gender);
          editor.putBoolean("deleteInfoShown", false);

          editor.commit();  
          
        dialog.dismiss();
        Toast.makeText(context, "V?tejte!", Toast.LENGTH_LONG).show();
        //activity.finish();
        Intent intent = new Intent(activity, DashboardActivity.class);
        activity.startActivity(intent);        
        
      } catch (JSONException e) {
        Log.e("Login Error", e.getMessage());
        
        dialog.dismiss();
        AlertDialog.Builder builder = new AlertDialog.Builder(activity);
          builder.setTitle("Chyba!")
        .setMessage("P?i komunikaci se serverem do?lo k chyb?, ujist?te se, ?e m?te funk?n? internetov? p?ipojen?.")                   
        .setCancelable(false)
        .setIcon(R.drawable.simple_icon)
            .setPositiveButton("OK", new DialogInterface.OnClickListener() {
                 public void onClick(DialogInterface dialog, int id) {
                   dialog.dismiss();
                 }
             });
          Dialog d = builder.create();
          d.show();
      }
      
      db.close();
    }
    

    }

  
  
}
Java Source Code List
