Programming the Mobile Web

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9780596807788: Programming the Mobile Web

Today's market for mobile apps goes beyond the iPhone to include BlackBerry, Nokia, Windows Phone, and smartphones powered by Android, webOS, and other platforms. If you're an experienced web developer, this book shows you how to build a standard app core that you can extend to work with specific devices. You'll learn the particulars and pitfalls of building mobile apps with HTML, CSS, and other standard web tools.
You'll also explore platform variations, finicky mobile browsers, Ajax design patterns for mobile, and much more. Before you know it, you'll be able to create mashups using Web 2.0 APIs in apps for the App Store, App World, Ovi Store, Android Market, and other online retailers.

  • Learn how to use your existing web skills to move into mobile development
  • Discover key differences in mobile app design and navigation, including touch devices
  • Use HTML, CSS, JavaScript, and Ajax to create effective user interfaces in the mobile environment
  • Learn about technologies such as HTML5, XHTML MP, and WebKit extensions
  • Understand variations of platforms such as Symbian, BlackBerry, webOS, Bada, Android, and iOS for iPhone and iPad
  • Bypass the browser to create offline apps and widgets using web technologies
(edited by author)
Seven Myths of the Mobile Web
by Maximiliano Firtman

As the Web has moved onto mobile devices, developers have told themselves a lot of stories about what this means for their work. While some of those stories are true, others are misleading, confusing, or even dangerous.

It’s not the mobile web; it’s just the Web!

I’ve heard this quote many times in the last few years, and it’s true. It’s really the same Web. Think about your life. You don’t have another email account just for your mobile. (OK, I know some guys that do, but I believe that’s not typical!)

You read about the last NBA game on your favorite site, like ESPN; you don’t have a desktop news source and a different mobile news source. You really don’t want another social network for your mobile; you want to use the same Facebook or Twitter account as the one you used on your desktop. It was painful enough creating your friends list on your desktop, you’ve already ignored many people...you don’t want to have to do all that work again on your mobile.

For all of these purposes, the mobile web uses the same network protocols as the whole Internet: HTTP, HTTPS, POP3, Wireless LAN, and even TCP/IP. OK, you can say that GSM, CDMA, and UMTS are not protocols used in the desktop web environment, but they are communication protocols operating at lower layers. From our point of view, from a web application approach, we are using the same protocols.

So, yes...it’s the same Web. However, when developing for the mobile web we are targeting very, very different devices. The most obvious difference is the screen size, and yes, that will be our first problem. But there are many other not-so-obvious differences. One issue is that the contexts in which we use our mobile devices are often extremely different from where and how we use our comfortable desktops or even our laptops and netbooks.

Don’t get me wrong--this doesn’t mean that, as developers, we need to create two, three, or dozens of versions duplicating our work. In this book, we are going to analyze all the techniques available for this new world. Our objective will be to make only one product, and we’ll analyze the best way to do it.

You don’t need to do anything special about your desktop website.

Almost every smartphone on the market today--for example, the iPhone and Android-based devices--can read and display full desktop websites. Yes, this is true. Users want the same experience on the mobile web as they have on their desktops. Yes, this is also true. Some statistics even indicate that users tend to choose web versions over mobile versions when using a smartphone.

However, is this because we really love zooming in and out, scrolling and crawling for the information we want, or is it because the mobile versions are really awful and don’t offer the right user experience? I’ve seen a lot of mobile sites consisting of nothing but a logo and a couple of text links. My smartphone wants more!

One website should work for all devices (desktop, mobile, TV, etc.).

As we will see, there are techniques that allow us to create only one file but still provide different experiences on a variety of devices, including desktops, mobiles, TVs, and game consoles. This vision is called “One Web.” This is to an extent possible today, but the vision won’t fully be realized for years to come. Today, there are a lot of mobile devices with very low connection speeds and limited resources--non--smartphones—that, in theory, can read and parse any file, but will not provide the best user experience and will have compatibility and performance problems if we deliver the same document as for desktop. Therefore, One Web remains a goal for the future. A little additional work is still required to provide the right user experience for each mobile device, but there are techniques that can be applied to reduce the work required and avoid code and data duplication.

Mobile web is really easy; Just create a WML file.

I’m really surprised how many mobile websites are still developed using a technology deprecated many years ago: WML (Wireless Markup Language). Even in emerging markets, there are almost no WML-only web-capable devices on the market today. The worst part of this story is that these developers think that this is the markup language for the mobile web. Wrong! WML development was called mobile web (or WAP) development a couple of years ago, when the first attempt at building a mobile web was made. There are still a small proportion of WML-only devices available in some markets, but WML is definitely not the mobile web today.

Just create an HTML file with a width of 240 Pixels, and you have a mobile website.

This is the other fast-food way to think about the mobile web. Today, there are more than 3,000 mobile devices on the market, with almost 30 different browsers (actually, more than 300 different browsers if we separate them by version number). Creating one HTML file as your mobile website will be a very unsuccessful project. In addition, doing so contributes to the belief that mobile web browsing is not useful.

Native mobile applications will kill the mobile web.

Every solution has advantages and disadvantages. The mobile web has much to offer native applications, as Chapter 12 of this book will demonstrate. The mobile web (and the new concept of mobile widgets) offers us a great multi-device application platform, including local applications that don’t require an always-connected Web with URLs and browsers.

People are not using their mobile browsers.

How many Internet connections are there in the world?

    1,802,330,457 (26% of the world’s population) at the beginning of 2010 (http://www.internetworldstats.com)

How many people have mobile devices?

    4,600,000,000 (68% of the population) at the beginning of 2010 (U.N. Telecommunications Agency, http://www.itu.int)

So, one of the reasons why people are not using their mobile browsers may be because of us, the web producers. We are not offering them what they need. There are other factors, but let’s talk about what we can do from our point of view.

Opera Mini is a mobile browser for low- and mid-range devices. It is free and it has had more than 50 million downloads to date. This tells us that 50 million users wanted to have a better mobile web experience, so they went out and got Opera Mini. Do all the 4 billion plus worldwide mobile device users know about Opera Mini? Perhaps not, so it’s difficult to know how many would be interested in trying this different mobile web experience. However, 50 million downloads for only one browser that the user had to install actively is a big number for me. When Opera Mini appeared in Apple Inc.’s App Store, from which users can download and install applications for the iPhone, iPod, and iPad, 1 million users downloaded the browser on the first day. This is quite impressive.

Today, less than 4% of total web browsing is done from mobile devices. This percentage is increasing month by month. Mobile browsing may never become as popular as desktop browsing, but it will increase a lot in the following years.

In addition, user browsing on mobile devices will likely have a higher conversion rate. How many tabs do you usually have open at once in Internet Explorer or Firefox on your desktop or laptop? On a mobile device, when you browse you are more specific and more likely to act on what you find.

Le informazioni nella sezione "Riassunto" possono far riferimento a edizioni diverse di questo titolo.

About the Author:

Maximiliano Firtman is a developer focused on mobile and RIA development. He is a professor in web and mobile technologies, and founder of ITMaster Professional Training. He is author of many books in Spanish, including books on Java ME, ASP.NET, AJAX and Professional Web 2.0.

He is founder and manager of ARFUG (Argentina RIA & Flex User Group), an official Adobe User Group covering many RIA technologies, including AJAX, Flex, AIR and Silverlight. He has spoken at conferences in Spanish and English and published dozens of articles in magazines (.CODE, Users) and online (MaestrosDelWeb, Forum Nokia).

He has been a Forum Nokia Champion since 2006, and has developed many mobile projects as MobileTinyURL.com and widgen.com.

He is an expert in AJAX, Adobe Flex, Java ME, Widgets for Mobile and iPhone development.

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