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Communicating with MySQL Database from iPhone/Android Using Web Services and JSON

DESCRIPTION

This project demonstrates how to create a web service that enables iPhone and Android applications to communicate with a remote MySQL database. By implementing a custom database client protocol, smartphone applications can post requests via HTTP to an Apache server, which in turn interacts with a MySQL database. The server processes these requests and sends back the data in JSON format, allowing for efficient data handling. The tutorial includes basic MySQL operations such as creating, reading, and deleting tables and rows, along with sample code.

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Communicating with MySQL Database from iPhone/Android Using Web Services and JSON

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Presentation Transcript

  1. IPhone/Android & MySQL Hongsheng Lu CSE40333/60333 2011 Spring University of Notre Dame

  2. Background • The need to communicate with a remote database • Create a web service which iphone/android can talk to. The web service communicates with the database. • Write your own database client protocol.

  3. Setting in the lab Apache MySQL 1. iPhone/Android posts a request to spike using HTTP 2. Apache connects to MySQL database 3. Apache returns data to iPhone/Android 4. iPhone/Andorid processes the data Server Spike.cse.nd.edu

  4. Demo basic MySQL operations Create, read, drop tables; Insert, delete rows; Web service step up; push data; pull data; Sample code <?php mysql_connect("host","username","password"); mysql_select_db("PeopleData"); $q=mysql_query("SELECT * FROM people WHERE birthyear>'".$_REQUEST['year']."'"); while($e=mysql_fetch_assoc($q))         $output[]=$e; print(json_encode($output)); mysql_close(); ?>

  5. Smart phone side JSON: JavaScript Object Notation. format is often used for serializing and transmitting structured data over a network connection. It is primarily used to transmit data between a server and web application, serving as an alternative to XML //convert response to string //http post HttpClienthttpclient = new DefaultHttpClient(); HttpPosthttppost = new HttpPost("http://example.com/getAllPeopleBornAfter.php"); httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs)); HttpResponse response = httpclient.execute(httppost); HttpEntity entity = response.getEntity(); InputStream is = entity.getContent(); //parse json data JSONArrayjArray = new JSONArray(result);         for(inti=0;i<jArray.length();i++){ JSONObjectjson_data = jArray.getJSONObject(i); Log.i("log_tag","id: "+json_data.getInt("id")+                         ", name: "+json_data.getString("name")+                         ", sex: "+json_data.getInt("sex")+                         ", birthyear: "+json_data.getInt("birthyear")

  6. Smart phone side • JSON-framework for iphone. Tutorial will be given.

  7. Links • JSON-framework • Download: http://code.google.com/p/json-framework/ • Tutorial: http://iphonedevelopertips.com/cocoa/json-framework-for-iphone-part-2.html • Tutorial: http://www.mobileorchard.com/tutorial-json-over-http-on-the-iphone/ • MySQL • Download : http://www.mysql.com/ • Tutorial: http://dev.mysql.com/doc/refman/5.0/en/tutorial.html • Android • Tutorial: http://www.helloandroid.com/tutorials/connecting-mysql-database • Tutorial: http://www.androidcompetencycenter.com/2009/10/json-parsing-in-android/

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