Building Mobile Web Applications Using HTML5 & CSS3

Building Mobile Web Applications Using

HTML5 & CSS3 5 Week Training CourseAugust 7 - Sept. 4, 2012

InstructorsTom Cornyn & Pankil Patel

Presented By South Bay Mobile User Group

Week 1Class Overview

South Bay Mobile User Group

Class Application Projects• Convert a standard website into a mobile compatible website

• Build a weather application that utilizes animation


New HTML Elements

• <section>• <nav>• <header>• <canvas>• <video>• <audio>


• What's new in HTML5, CSS3, and Javascript for mobile development

• You will learn how to style mobile apps that respond to a mobile device's vertical and horizontal orientation

• Mobile browser DOM API

• The mobile viewport

• ReST APIs

• Make AJAX calls

• Create basic animations (HTML5 Canvas API)


Orientation Detection


Geolocation


Web SQL Database


Form Field Types


HTML5 Video and Audio


Week 2Agenda


HTML5 & CSS3


The Viewport Meta Tag

• Device-width

• User-scale• Device-height


Device Emulators

• Android SDK• XCode for OSX• iPod Touch


Full-Screen (iOS standalone) Mode

• Adding a home screen icon

• The Mobile Bookmark Bubble JavaScript widget

• The hiding the chrome of the Safari mobile browser


CSS Resets


• How they work• What they do

The Orientationchange Event

• How to bind to it • What to do with it


Week 3Agenda


HTML5 & CSS3



• Using form fields in mobile apps• How to build mobile library-independent, jpeg-based

animation for a mobile weather web app (noaa.socktan.com)

• Optimizing page load timeso Checklist for client-side optimizationo Correct load sequence ordering

• Content delivery networks, cloud services.• How to turn RSS feeds into content-rich,

asynchronous mobile web apps for fun and for profit.• Outline asynchronous http (XHR) requests and

JavaScript DOM insertions using Twitter, et cetera.

Week 4Instructor - Pankil Patel

[email protected]


HTML5 & CSS3


Agenda

• Web Storageo Offline Web Applicationso Local Storage/Session Storageo Web SQLo Indexed DB

• Geo Location


Offline Web Applications

• Overview• Application Cache Events• Demo• Sample Websites


Offline Web Applications: Overview

• Browsers supporting Offline web storage



HTML file

Cache Manifest file which contains- Files to cache- Exclusions- Fallback

References

• How it works

User browses



• What gets cachedo Master Entrieso The manifesto Explicit Entrieso Fallback Entries


Application Cache EventsIf the browser visits a web page, has NOT seen the web page before and as a result does not recognize the manifest file, the following events will ensue.Checking Event - occurs when the browser visits a web page and reads the manifest attribute on the <html> element.

Downloading Event - if the browser has never come across this manifest file before, it will download all the resources given in the manifest file.

Progress Event - contains information of how many files have been downloaded and how many files are left to be downloaded.

Cached Event - occurs once all the files have been downloaded and the offline web application is equipped to be used offline.

If the browser has visited the web page before and recognizes the manifest file the following events will ensue.Noupdate Event - this will take place if the cache manifest has not changed.

Downloading Event - if the cache manifest has changed the resources the file will be downloaded again.

Progress Event - this contains information of how many files have been downloaded and how many files are left to be downloaded.

Updateready Event - after the re-downloading is complete, this event is triggered, indicating that the new offline version is ready to be used.


Demo


Sample Websites & API LinksSample Websites• Microsoft Kids Story Book

o http://bit.ly/PHum3r

API Links• Safari Developer Center

o http://bit.ly/OADt6M


http://bitly.com/bundles/pankilpatel/1





Local Storage & Session Storage

• Overview• API• Demo• Sample Websites


Local & Session Storage Overview

• Browsers supporting local & session storage


Local & Session Storage Overview

• Limitations of Cookieso 4KB per cookieo Sent with every HTTP request

• Local/Session Storageo Simple API to get/set key/value pairo Size of 5MB/domain, some browsers allow 10MBo Local storage available to all browser windows, data available

when browser is closed and reopened.o Session storage available to a particular browser window


Local & Session Storage APIinterface Storage {

readonly attribute unsigned long length;

getter DOMString key(in unsigned long index);

getter any getItem(in DOMString key);

setter creator void setItem(in DOMString key, in any value);

deleter void removeItem(in DOMString key);

void clear();

};

[Constructor(DOMString type, optional StorageEventInit eventInitDict)]

interface StorageEvent : Event {

readonly attribute DOMString key;

readonly attribute DOMString? oldValue;

readonly attribute DOMString? newValue;

readonly attribute DOMString url;

readonly attribute Storage? storageArea;

};


Demo


Sample Websites & Links

• Contacts Applicationo http://bit.ly/d2qV6h

• Chrome storageo http://bit.ly/MXxRoT


http://bit.ly/d2qV6h

http://bit.ly/d2qV6h

http://bit.ly/MXxRoT



Web SQL

• Overview• API• Demo• Sample Websites


Web SQL Overview

• Browsers supporting Web SQL


Web SQL Overview

• Web SQL dBs can be used on client-side• The specification is based around SQLite

(3.1.19)• http://www.w3.org/TR/webdatabase/• At any given time only one version of the

database can exist.


http://www.w3.org/TR/webdatabase/

http://www.w3.org/TR/webdatabase/

API – Asynchronous DBinterface Database {

void transaction(in SQLTransactionCallback callback, in optional SQLTransactionErrorCallback errorCallback, in optional SQLVoidCallback successCallback);

void readTransaction(in SQLTransactionCallback callback, in optional SQLTransactionErrorCallback errorCallback, in optional SQLVoidCallback successCallback);

readonly attribute DOMString version;

void changeVersion(in DOMString oldVersion, in DOMString newVersion, in optional SQLTransactionCallback callback, in optional SQLTransactionErrorCallback errorCallback, in optional SQLVoidCallback successCallback);

};

[Callback=FunctionOnly , NoInterfaceObject]

interface SQLVoidCallback {

void handleEvent();

};


interface SQLTransactionCallback {

void handleEvent(in SQLTransaction transaction);

};


interface SQLTransactionErrorCallback {

void handleEvent(in SQLError error);

};


API – Execute SQLtypedef sequence<any> ObjectArray;

interface SQLTransaction {

void executeSql(in DOMString sqlStatement, in optional ObjectArray arguments, in optional SQLStatementCallback callback, in optional SQLStatementErrorCallback errorCallback);

};

[Callback=FunctionOnly, NoInterfaceObject]

interface SQLStatementCallback {

void handleEvent(in SQLTransaction transaction, in SQLResultSet resultSet);

};

[Callback=FunctionOnly, NoInterfaceObject]

interface SQLStatementErrorCallback {

boolean handleEvent(in SQLTransaction transaction, in SQLError error);

};


Demo


Sample Website

• Transaction Rollback testo http://bit.ly/b9CiAz

• Add/Update Web SQL entrieso http://bit.ly/O09nbP


http://bit.ly/b9CiAz

http://bit.ly/b9CiAz

http://bit.ly/O09nbP

http://bit.ly/O09nbP

Indexed DB

• Overview

• API

• Demo

• Sample Websites


Indexed DB - Overview

• Browsers supporting Indexed DB


Indexed DB – Overview

• Provides in-order retrieval of keys

• Efficient searching over values

• Storage of duplicate values for a key

• Uses transactional databases to store keys and their corresponding values(one or more per key)

• http://www.w3.org/TR/IndexedDB/

• http://mzl.la/RdDamY


http://www.w3.org/TR/IndexedDB/

http://www.w3.org/TR/IndexedDB/

http://mzl.la/RdDamY

http://mzl.la/RdDamY

Indexed DB – Asynchronous APIIDBCursor - iterates over object stores and indexes.IDBDatabase - represents a connection to a database. It's the only way to get a transaction on the database.IDBFactory - provides access to a database.IDBEnvironment - provides access to a client-side database. It is implemented by window objects.IDBIndex - provides access to the metadata of an index.IDBObjectStore - represents an object store.IDBOpenDBRequest - represents a request to open a database.IDBRequest - provides access to results of asynchronous requests to databases and database objects. It is what you get when you call an asynchronous method.IDBTransaction - represents a transaction. You create a transaction on a database, specify the scope (such as which object stores you want to access), and determine the kind of access (read only or write) that you want.IDBVersionChangeEvent - indicates that the version of the database has changed.


Demo


Sample Websites

• API Exampleso http://bit.ly/SNhnlv

• Microsofto http://ie.microsoft.com/testdrive/HTML5/Cookbook/


http://bit.ly/SNhnlv



http://ie.microsoft.com/testdrive/HTML5/Cookbook/

http://ie.microsoft.com/testdrive/HTML5/Cookbook/

Geolocation

• Overview

• API

• Demo

• Sample Websites


Geolocation – Overview

• Browsers supporting Geolocation


Geolocation - Overview

• API that provides scripted access to geographical location information associated with the hosting device

• API is agnostic of the underlying source of the information

• Sources can be IP address, RFID, Wi-Fi and Bluetooth MAC addresses, and GSM/CDMA cell IDs, as well as user input

• No guarantee is given that the API returns the device's actual location

Geolocation API[NoInterfaceObject]

interface Geolocation {

void getCurrentPosition(PositionCallback successCallback,

optional PositionErrorCallback errorCallback,

optional PositionOptions options);

long watchPosition(PositionCallback successCallback,

optional PositionErrorCallback errorCallback,

optional PositionOptions options);

void clearWatch(long watchId);

};

callback PositionCallback = void (Position position);

callback PositionErrorCallback = void (PositionError positionError);


Demo

• http://www.e-radiance.com/html5/geolocation.html


http://www.e-radiance.com/html5/geolocation.html

http://www.e-radiance.com/html5/geolocation.html

Sample Websites

• Microsofto http://ie.microsoft.com/testdrive/HTML5/Geolocation/Default.html

• Googleo https://google-developers.appspot.com/maps/documentation/jav

ascript/examples/map-geolocation

http://ie.microsoft.com/testdrive/HTML5/Geolocation/Default.html

http://ie.microsoft.com/testdrive/HTML5/Geolocation/Default.html

https://google-developers.appspot.com/maps/documentation/javascript/examples/map-geolocation

https://google-developers.appspot.com/maps/documentation/javascript/examples/map-geolocation

Good to know sites

• HTML5o Mozilla Dev. Network: http://mzl.la/SOfTpLo IE Test Drive: http://bit.ly/9CbjcEo Html5 Demos: http://bit.ly/cVRHk5o Html5 Test: http://html5test.com/o CSS3 Test: http://css3test.com/o Markup Validation Service: http://validator.w3.org/

http://mzl.la/SOfTpL



http://bit.ly/9CbjcE

http://bit.ly/9CbjcE

http://bit.ly/cVRHk5

http://bit.ly/cVRHk5

http://html5test.com/

http://css3test.com/

http://css3test.com/

http://validator.w3.org/

http://validator.w3.org/

Questions

Building Mobile Web Applications Using HTML5 & CSS3

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