Building Android Apps with HTML, CSS, and JavaScript: Making by Jonathan Stark, Brian Jepson

By Jonathan Stark, Brian Jepson

It’s precise: in the event you be aware of HTML, CSS, and JavaScript, you have already got the instruments you want to boost Android functions. Now up-to-date for HTML5, the second one variation of this hands-on consultant indicates you ways to exploit open resource net criteria to layout and construct apps that may be tailored for any Android device.

You’ll how one can create an Android-friendly net app at the platform of your selection, after which use Adobe’s loose PhoneGap framework to transform it to a local Android app. detect why device-agnostic cellular apps are the wave of the longer term, and begin development apps that supply larger flexibility and a wider reach.
* Convert an internet site right into a internet software, entire with growth signs and different good points
* upload animation with JQTouch to make your net app appear and feel like a local Android app
* utilize client-side information garage with apps that run while the Android gadget is offline
* Use PhoneGap to hook into complex Android positive factors, together with the accelerometer, geolocation, and indicators
* try and debug your app on the internet with actual clients, and put up the completed product to the Android industry

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Extra info for Building Android Apps with HTML, CSS, and JavaScript: Making Native Apps with Standards-Based Web Tools

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The range of allowable values is 0 to 1, where 0 is fully transparent and 1 is fully opaque; decimal values between 0 and 1 will be rendered translucent. The line-height declaration moves the text down vertically in the box so it’s not flush against the top border. The border-width and -webkit-border-image lines require a bit of explanation. These two properties together allow you to assign portions of a single image to the border area of an element. If the box resizes because the text increases or decreases, the border image will stretch to accommodate it.

Match function uses a language, regular expressions, that is often embedded within other programming languages such as JavaScript, PHP, and Perl. Although this regular expression is simple, more complex expressions can be a bit intimidating, but are well worth becoming familiar with. html. Roll Your Own Back Button The elephant in the room at this point is that the user has no way to navigate back to previous pages (remember that we’ve hijacked all the links, so the browser page history won’t work).

Crashing). Figure 3-1. Without a progress indicator of some kind, your app will seem unresponsive and your users will get frustrated Simple Bells and Whistles | 41 Thanks to jQuery, providing a progress indicator only takes two lines of code. We’ll just append a loading div to the body when loadPage() starts and remove the loading div when hijackLinks() is done. Example 3-4 shows a modified version of Example 3-3. js are shown in bold. Example 3-4. css to style the progress div. Example 3-5. 7); color: white; font-size: 18px; font-weight: bold; height: 80px; left: 60px; line-height: 80px; margin: 0 auto; position: absolute; text-align: center; top: 120px; width: 200px; } 42 | Chapter 3: Advanced Styling Simulating Real-World Network Performance If you are testing this web application on a local network, the network speeds will be so fast you won’t ever see the progress indicator.

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