By Damon Oehlman
Developing purposes for Android and different cellular units utilizing net applied sciences is now good within sight. while the functions of HTML5 are mixed with CSS3 and JavaScript, net software builders have a chance to advance compelling cellular purposes utilizing customary instruments. not just is it attainable to construct cellular internet apps that believe nearly as good as local apps, yet to additionally write an program as soon as and feature it run numerous various devices.
whereas the HTML5 specification continues to be evolving, there's a lot that may be used right away to construct cellular net apps. cellular internet apps are actually commencing to supply some of the beneficial properties that have been as soon as in simple terms on hand to native-language-based apps in Java, Objective-C, and so forth. Pro Android net Apps teaches builders already accustomed to net program improvement, how one can code and constitution an internet app to be used at the Android cellular platform.
- Understand either the why and the way of cellular internet app improvement, targeting the Android platform.
- Learn the way to constitution cellular net apps via a few useful, real-world software examples.
- Discover what cloud systems akin to Google AppEngine need to provide Android internet apps, for either internet hosting net apps and delivering equipment to cloud facts synchronization options.
- Get a true photo of the prestige of HTML5 on Android and different cellular units, together with a few issues to observe out for whilst construction your individual purposes.
- Understand the functions of the internet program stack, and the way to counterpoint people with local bridging frameworks comparable to PhoneGap to entry local good points of the gadget.
- Gain an realizing of different UI frameworks which are to be had for development cellular internet apps.
- Learn tips to contain mapping and leverage location-based companies in cellular net apps to create enticing cellular reports.
- Enable social integration along with your Android net app and achieve entry to hundreds of thousands of strength users.
After analyzing this booklet, you won't purely have a better realizing of the realm of net apps on Android, but additionally tips on how to leverage extra instruments and frameworks to extend the achieve of your cellular internet apps. also, throughout the functional samples within the ebook you've got been given good publicity of the place either the possibilities and demanding situations lie while construction cellular apps the net way.
Read or Download Pro Android Web Apps: Develop for Android using HTML5, CSS3 & JavaScript (Books for Professionals by Professionals) PDF
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Additional info for Pro Android Web Apps: Develop for Android using HTML5, CSS3 & JavaScript (Books for Professionals by Professionals)
GetElementById("simple"); // set the canvas top to the window peak and width canvas. width = window. innerWidth; canvas. peak = window. innerHeight; // get a connection with our drawing context context = canvas. getContext("2d"); } // resetContext $(window). bind("resize", resetCanvas). bind("reorient", resetCanvas); $(document). ready(function() { window. scrollTo(0, 1); resetCanvas(); record. physique. addEventListener("mousedown", function(evt) { if (buttonDown === zero) { context. moveTo(evt. pageX, evt. pageY); } // if ++buttonDown; }, false); CHAPTER 7: Exploring Interactivity rfile. physique. addEventListener("mousemove", function(evt) { if (buttonDown > zero) { context. lineTo(evt. pageX, evt. pageY); context. stroke(); } // if }, false); record. physique. addEventListener("mouseup", function(evt) { --buttonDown; }, false); }); })(); to check this code, run it utilizing an HTML5-compatible computer browser. As pointed out in earlier chapters, Chrome is an effective selection, because it relies on WebKit and has a few very good instruments help. determine 7–2 exhibits a pattern drawing after mouse interplay. observe: you'll be brooding about why we're operating code in a computer browser while it is a publication on cellular improvement. good, within the previous instance, we're operating with mouse occasions, so a laptop browser is needed. also, as you start to paintings extra with cellular net app improvement, you will discover machine browsers are a huge a part of your improvement technique. there's very little improvement instruments help on cellular browsers at this level, so it’s vital to not disregard your desktop-based WebKit browser as a huge a part of your improvement device set. 133 134 bankruptcy 7: Exploring Interactivity determine 7–2. utilizing mouse occasions and the HTML5 canvas permits tragic artists to specific themselves. whereas the previous code works good adequate in a browser, it does completely not anything beneficial on an Android device—unless in fact you think about with the ability to scroll the name bar that we concealed again into view precious. Interactivity: the way in which of contact In transitioning to utilizing contact occasions, let’s first have a look at the event-naming conventions, as displayed in desk 7–1. desk 7–1. How contact occasions Relate to Respective Mouse occasions interplay sort commence occasion “Continue” occasion finish occasion Mouse mousedown mouseover mouseup contact landing touchmove touchup CHAPTER 7: Exploring Interactivity The naming of those features offers us a clue to the variations among operating with contact and mouse occasions. either mouse and contact occasions have “down” and “up” occasions to indicate that interplay has began and ended, respectively. the first distinction, although, is among the mouseover and touchmove occasions. a slightly occasion has no inspiration of soaring, and hence we don't have any touchover occasion, so it truly is changed with the touchmove occasion, signifying contact occasion has began and the contact issues are altering. this can be a tremendous aspect to notice, as accepted internet strategies equivalent to “hover states” haven't any influence on cellular units, so it’s very important to think about replacement mechanisms to supply suggestions in your app clients.