Mobile Programming Lecture 15. Web APIs and Mashups

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1 Mobile Programming Lecture 15 Web APIs and Mashups

2 Agenda Web APIs Creating your own Web API Mashups programmableweb.com Gamification

3 Web APIs - What are they? Data, data, data, there's data somewhere and I want to use it Google data, Facebook data, Twitter data, ESPN data, music data, movie data, my own data I don't want to see the data graphically, I just want to use it for my app!

4 Creating your own Web API Let's say you have a server, which hosts a very valuable database That is, the community sees your data as a money-maker VeryValuableTable Server

5 Creating your own Web API e.g. VeryValuableDatabase VeryValuableTable id fname lname password 1 Martin Brown mbrown@cs.fsu.edu *(&^==*&^% 2 Abe Lincoln VeryValuableTable Server

6 Creating your own Web API 1.Create a file on your server, e.g. api.php 2.Construct a query from the arguments to api.php, e.g. a. HTTP GET b. SELECT fname, lname from VeryValuableTable WHERE id = 1 1.return the data in JSON format

7 Creating your own Web API That's the basic idea Your API may also allow HTTP POST/PUT/DELETE There's a lot more to creating a Web API to consider Security Developer registration/api keys Web API Architecture Documentation for your API users Service for your API users etc...

8 Creating your own Web API Creating a REST API with PHP REST APIs RESTful

9 Web API Consumer versus Provider Using an existing Web API No need for a server Don't have to write server-side code Quicker way to communicate over the Internet Platform independent because of XML/JSON Creating your own Web API Full control over the data (you write the SQL queries) You can use your existing relational database for other purposes Data integrity This may be the way to go if you already have a sophisticated relational DB up and running May be a money-maker

10 Web API Consumer versus Provider Using an existing Web API API may have bugs, which you cannot fix API may be discontinued o face.com o x-stream.ly o Imagine if you were using the MySpace API in 2004! Terms of service may change o Google Translate used to be free! Creating your own Web API Need for maintenance / bug fixes Time consuming Have to really consider the cost

11 Communicating via the Internet Send JSON Read JSON Client A Read JSON Database / Custom Server Send JSON Client B

12 API Management Services "When launching and managing your API, many companies choose to do all the work themselves, unaware that there are service providers available to help you plan, deploy, launch and manage your API infrastructure and ecosystem" Source

13 Mashups A web mashup is a web page or application that combines data from two or more external online sources

14 Mashups A mashup is an application that combines multiple APIs to create a new service

15 Mashups A mashup is an application that combines multiple APIs to create a new service +

16 Mashups A mashup is an application that combines multiple APIs to create a new service +

17 Mashups A mashup is an application that combines multiple APIs to create a new service + =

18 Mashups A mashup is an application that combines multiple APIs to create a new service + =?

19 Mashups A mashup is an application that combines multiple APIs to create a new service + =

20 Mashups geogreeting is pretty cool

21 Mashups Mashups as a whole weren't doing too well back in 2007 Mashups are making a comeback o Google Now o Zapier o Any others?

22 programmableweb.com API Directory Mashup Directory

23 Some other Interesting Web APIs Media Information o The Movie Database o The OMDB Api o TheTVDB Music Information o last.fm Sports o ESPN Government

24 The Volley Library We can make HTTP gets the old fashioned way (HttpClient) A better method is the Volley class Uses a queue to perform automatic scheduling Supports concurrent network connections Prioritize and cancel requests Add to build.gradle: compile 'com.android.volley:volley:1.1.0'

25 The Volley Library public void runquery(view v) { RequestQueue queue = Volley.newRequestQueue(this); JsonObjectRequest jsonobjectrequest = new JsonObjectRequest(Request.Method.GET, url, null, new Response.Listener<JSONObject>() public void onresponse(jsonobject response) { handleresponse(response); } }, new Response.ErrorListener() { public void onerrorresponse(volleyerror error) { mtextresults.settext(getstring(r.string.error_search)); } }); // Add request to the RequestQueue queue.add(jsonobjectrequest);

26 Gamification Which one of these would you consider fun? Changing a baby's diaper Clipping someone else's toenails Planting crops Waiting tables

27 Gamification Which one of these would you consider fun? Diaper Dash Sally's Salon Farmville Diner Dash

28 Gamification - a definition "the use of game design elements in non-game contexts", Deterding, Sebastian, Dan Dixon, and Rilla Khaled. "Gamification: Toward a definition."chi 2011 (2011):

29 Gamification Google Tech Talk on Gamification by Sebastian Detering Why I Quit Playing FourSquare by Arsenio Santos

30 References The Mobile Lab at Florida State University

Android development. Outline. Android Studio. Setting up Android Studio. 1. Set up Android Studio. Tiberiu Vilcu. 2.

Android development. Outline. Android Studio. Setting up Android Studio. 1. Set up Android Studio. Tiberiu Vilcu. 2. Outline 1. Set up Android Studio Android development Tiberiu Vilcu Prepared for EECS 411 Sugih Jamin 15 September 2017 2. Create sample app 3. Add UI to see how the design interface works 4. Add some code