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IPhone /Android & MySQL

Learn to create a web service facilitating iPhone/Android communication with a remote MySQL database. Includes setting up Apache, MySQL operations, client protocol, JSON handling & smartphone app development.

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IPhone /Android & MySQL

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  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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