<?php
/**
 * File to handle all API requests
 * Accepts GET and POST
 *
 * Each request will be identified by TAG
 * Response will be JSON data
 
  /**
 * check for POST request
 */
if (isset($_POST['tag']) && $_POST['tag'] != '') {
    // get tag
    $tag = $_POST['tag'];
 
    // include db handler
    require_once 'include/DB_Functions.php';
    $db = new DB_Functions();
 
    // response Array
    $response = array("tag" => $tag, "success" => 0, "error" => 0);
 
    // check for tag type
    if ($tag == 'login') {
        // Request type is check Login
        $email = $_POST['email'];
        $password = $_POST['password'];
 
        // check for user
        $user = $db->getUserByEmailAndPassword($email, $password);
        if ($user != false) {
            // user found
            // echo json with success = 1
            $response["success"] = 1;
            $response["uid"] = $user["unique_id"];
            $response["user"]["name"] = $user["name"];
            $response["user"]["email"] = $user["email"];
            $response["user"]["created_at"] = $user["created_at"];
            $response["user"]["updated_at"] = $user["updated_at"];
            echo json_encode($response);
        } else {
            // user not found
            // echo json with error = 0
            $response["error"] = 1;
            $response["error_msg"] = "Incorrect email or password!";
            echo json_encode($response);
        }
    } else if ($tag == 'register') {
        // Request type is Register new user
        $name = $_POST['name'];
        $email = $_POST['email'];
        $password = $_POST['password'];
 
        // check if user is already existed
        if ($db->isUserExisted($email)) {
            // user is already existed - error response
            $response["error"] = 2;
            $response["error_msg"] = "User already existed";
            echo json_encode($response);
        } else {
            // store user
            $user = $db->storeUser($name, $email, $password);
            if ($user) {
                // user stored successfully
                $response["success"] = 1;
                $response["uid"] = $user["unique_id"];
                $response["user"]["name"] = $user["name"];
                $response["user"]["email"] = $user["email"];
                $response["user"]["created_at"] = $user["created_at"];
                $response["user"]["updated_at"] = $user["updated_at"];
                echo json_encode($response);
            } else {
                // user failed to store
                $response["error"] = 1;
                $response["error_msg"] = "Error occured in Registartion";
                echo json_encode($response);
            }
        }
    } else {
        echo "Invalid Request";
    }
} else {
    echo "Access Denied";
}
?>

<?php
 
define("DB_HOST", "localhost");
define("DB_USER", "yourUser");
define("DB_PASSWORD", "yourPass");
define("DB_DATABASE", "yourDbName");
?>

<?php
 
class DB_Connect {
 
    // constructor
    function __construct() {
 
    }
 
    // destructor
    function __destruct() {
        // $this->close();
    }
 
    // Connecting to database
    public function connect() {
        require_once 'config.php';
        // connecting to mysql
        $con = mysql_connect(DB_HOST, DB_USER, DB_PASSWORD);
        // selecting database
        mysql_select_db(DB_DATABASE);
 
        // return database handler
        return $con;
    }
 
    // Closing database connection
    public function close() {
        mysql_close();
    }
 
}
 
?>

ProgressDialog progressDialog = new ProgressDialog(getActivity());
progressDialog.setMessage("Logging in...");
LoginTask loginTask = new LoginTask(getActivity(), progressDialog);
loginTask.execute();

public class LoginTask extends AsyncTask {
 
	private ProgressDialog progressDialog;
	private Polling activity;
	private JSONParser jsonParser;
	private static String loginURL = "http://davidjkelley.net/android_api/";
	private static String registerURL = "http://davidjkelley.net/android_api/";
	private static String KEY_SUCCESS = "success";
	private static String KEY_ERROR = "error";
	private static String KEY_ERROR_MSG = "error_msg";
	private static String KEY_UID = "uid";
	private static String KEY_NAME = "name";
	private static String KEY_EMAIL = "email";
	private static String KEY_CREATED_AT = "created_at";
	private int responseCode = 0;
 
	public LoginTask(Polling activity, ProgressDialog progressDialog)
	{
		this.activity = activity;
		this.progressDialog = progressDialog;
	}

	protected void onPreExecute() {
		progressDialog.show();
	}

protected Integer doInBackground(String... arg0) {
  EditText userName = (EditText)activity.findViewById(R.id.emailEditText);
  EditText passwordEdit = (EditText)activity.findViewById(R.id.passEditText);
  String email = userName.getText().toString();
  String password = passwordEdit.getText().toString();
  UserFunctions userFunction = new UserFunctions();
  JSONObject json = userFunction.loginUser(email, password);
 
// check for login response
    try {
	if (json.getString(KEY_SUCCESS) != null) {
	  String res = json.getString(KEY_SUCCESS);
 
	  if(Integer.parseInt(res) == 1){
		//user successfully logged in
		// Store user details in SQLite Database
		DatabaseHandler db = new DatabaseHandler(activity.getApplicationContext());
		JSONObject json_user = json.getJSONObject("user");
		// Clear all previous data in database
		userFunction.logoutUser(activity.getApplicationContext());
		db.addUser(json_user.getString(KEY_NAME), json_user.getString(KEY_EMAIL),
		  json.getString(KEY_UID), json_user.getString(KEY_CREATED_AT));
                //Login Success
		responseCode = 1;
 
	        }else{
		  responseCode = 0;
		//Error in login
		}
	        }
 
  } catch (NullPointerException e) {
    e.printStackTrace();
 
  }
  catch (JSONException e) {
    e.printStackTrace();
  }
 
return responseCode;
}

	protected void onPostExecute(Integer responseCode)
	{
		EditText userName = (EditText)activity.findViewById(R.id.emailEditText);
		EditText passwordEdit = (EditText)activity.findViewById(R.id.passEditText);
 
		if (responseCode == 1) {
			//return a successful login
			progressDialog.dismiss();
			activity.loginReport(responseCode);
			userName.setText("");
			passwordEdit.setText("");
			//shared prefences, store name
 
		}
		if (responseCode == 0) {
			//return an error in login
			progressDialog.dismiss();
			activity.loginReport(responseCode);
 
		}
	}

package com.davekelley.polling;
 
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.List;
import library.DatabaseHandler;
import library.JSONParser;
import library.UserFunctions;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
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 org.json.JSONException;
import org.json.JSONObject;
import com.actionbarsherlock.R;
import android.app.ProgressDialog;
import android.content.Context;
import android.content.Intent;
import android.os.AsyncTask;
import android.support.v4.app.FragmentActivity;
import android.util.Log;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;
 
public class RegisterTask extends AsyncTask {
 
	private ProgressDialog progressDialog;
	private Polling activity;
	private int id = -1;
	private JSONParser jsonParser;
	private static String loginURL = "http://davidjkelley.net/android_api/";
	private static String registerURL = "http://davidjkelley.net/android_api/";
	private static String KEY_SUCCESS = "success";
	private static String KEY_ERROR = "error";
	private static String KEY_ERROR_MSG = "error_msg";
	private static String KEY_UID = "uid";
	private static String KEY_NAME = "name";
	private static String KEY_EMAIL = "email";
	private static String KEY_CREATED_AT = "created_at";
	//TextView loginErrorMsg = (EditText)activity.findViewById(R.id.loginErrorMsg);
	private int responseCode = 0;
 
	public RegisterTask(Polling activity, ProgressDialog progressDialog){
	this.activity = activity;
	this.progressDialog = progressDialog;
	}
 
	@Override
	protected void onPreExecute(){
		progressDialog.show();
	}
 
	@Override
	protected Integer doInBackground(String... arg0) {
		EditText userName = (EditText)activity.findViewById(R.id.emailEditText);
		EditText passwordEdit = (EditText)activity.findViewById(R.id.passEditText);
		String email = userName.getText().toString();
		String password = passwordEdit.getText().toString();
		Log.v(email, password);
		UserFunctions userFunction = new UserFunctions();
        JSONObject json = userFunction.registerUser( email, password);
 
        // check for login response
        try {
            if (json.getString(KEY_SUCCESS) != null) {
                //registerErrorMsg.setText("");
                String res = json.getString(KEY_SUCCESS);
                if(Integer.parseInt(res) == 1){
                    // user successfully registred
                    // Store user details in SQLite Database
                    DatabaseHandler db = new DatabaseHandler(activity.getApplicationContext());
                    JSONObject json_user = json.getJSONObject("user");
 
                    // Clear all previous data in database
                    userFunction.logoutUser(activity.getApplicationContext());
                    db.addUser(json_user.getString(KEY_NAME),
                    	json_user.getString(KEY_EMAIL), json.getString(KEY_UID),
                    	json_user.getString(KEY_CREATED_AT));
                    //successful registration
                    responseCode = 1;
                }else{
                    // Error in registration
                	responseCode = 0;
                }
            }
        } catch (JSONException e) {
            e.printStackTrace();
        }
	return responseCode;
    }
 
	@Override
	protected void onPostExecute(Integer responseCode){
	EditText userName = (EditText)activity.findViewById(R.id.emailEditText);
	EditText passwordEdit = (EditText)activity.findViewById(R.id.passEditText);
	String s = userName.getText().toString();
 
		if (responseCode == 1) {
		progressDialog.dismiss();
		activity.registerReport(responseCode, s);
		userName.setText("");
		passwordEdit.setText("");
		}
		if (responseCode == 0) {
		progressDialog.dismiss();
		activity.registerReport(responseCode, null);
 
		}
	}
}