challenges going mobile
TRANSCRIPT
Challenges When Going Mobile
using APEX & jQuery Mobile
Christian Rokitta
About me• Oracle Developer since 1993• Oracle Employee 1996-1999• Developed web applications with
mod_plsql since 1999• Developing with APEX since 2008• Independent developer since 2010• Speaker (5th Kscope)• Author (Oracle APEX for mobile Web applications)
• Oracle ACE (2013)• Trainer (APEX, CSS/HTML/JS)• Product Development
Founding Member
Customer Case
apex.oracle.com/community
Customer Case
Customer Case
Agenda
• What makes jQuery Mobile different?
• How does this effect developing in APEX?• What are effective tools to develop
mobile web applications?
What is jQuery Mobile
• jQuery Mobile is a touch-friendly UI framework built on jQuery Core that works across all popular mobile, tablet and desktop platforms.
• Very simple (HTML) structure
• Look and Feel is applied after “page” is loaded
Basic page template<!DOCTYPE html><html><head> <title>Page Title</title> <meta name="viewport" content="width=device-width, initial-scale=1"> <link rel="stylesheet" href="http://code.jquery.com/mobile/[version]/jquery.mobile-[version].min.css" /> <script src="http://code.jquery.com/jquery-[version].min.js"></script> <script src="http://code.jquery.com/mobile/[version]/jquery.mobile-[version].min.js"></script></head><body><div data-role="page"> <div data-role="header"> <h1>Page Title</h1> </div><!-- /header --> <div role="main" class="ui-content"> <p>Page content goes here.</p> </div><!-- /content --> <div data-role="footer"> <h4>Page Footer</h4> </div><!-- /footer --></div><!-- /page --></body></html>
Multi-page template structureA single HTML document can contain multiple "pages" that are loaded together by stacking multiple divs with a data-role of "page".
Each "page" block needs a unique id (id="foo") that will be used to link internally between "pages" (href="#foo").
When a link is clicked, the framework will look for an internal "page" with the id and transition it into view.
Multi-page template structure<body>
<!-- Start of first page --><div data-role="page" id="foo">
<div data-role="header"><h1>Foo</h1>
</div><!-- /header --><div role="main" class="ui-content">
…</div><!-- /content --><div data-role="footer">
<h4>Page Footer</h4></div><!-- /footer -->
</div><!-- /page -->
<!-- Start of second page --><div data-role="page" id="bar">
<div data-role="header"><h1>Bar</h1>
</div><!-- /header --><div role="main" class="ui-content">
… </div><!-- /content --><div data-role="footer">
<h4>Page Footer</h4></div><!-- /footer -->
</div><!-- /page --></body>
Ajax Navigation• jQuery Mobile includes an Ajax navigation system to support a rich set of
animated page transitions by automatically 'hijacking' standard links and form submissions and turning them into an Ajax request.
• Whenever a link is clicked or a form is submitted, that event is automatically intercepted by the Ajax nav system and is used to issue an Ajax request based on the href or form action instead of reloading the page.
• When the requested page loads, jQuery Mobile parses the document for an element with the data-role="page" attribute, inserts that code into the DOM of the original page and applies all the styles and behavior.
• Now that the requested page is in the DOM and enhanced, it is animated into view with a transition.
• Whenever jQuery Mobile loads a page via Ajax, it flags the page to be removed from the DOM when you navigate away from it later
How does this effect developing in APEX?
Demo
Remember!
The id attribute of all your elements must be not only unique on a given page, but also unique across the pages in a site.
This is because jQuery Mobile's single-page navigation model allows many different "pages" to be present in the DOM at the same time.
Note to myself:
Don’t forget to show the strange behaviour after F5-ing and submitting a
page!
Page Processing vs AJAX
• Speed/Bandwidth
• Page loading, as seen before
• User Experience
Implicit vs Explicit AJAX in APEX• Implicit: using PL/SQL Dynamic Action– less control except when using it “SJAX”
• Explicit: using APEX Javascript API– apex.server.process– more coding– more flexibility
Basic AJAX Call Syntax
apex.server.process("P7_AJAX_CALL", {x01 : "test",pageItems :
"#P7_FIELD1,#P7_FIELD2"}, {
dataType : "text",success : function (pData) {
$s("P7_FIELD2", pData);}
});
Adding Options to AJAX Callapex.server.process("P7_AJAX_CALL", {
x01 : "test",pageItems : "#P7_FIELD1,#P7_FIELD2"
}, {dataType : "text",success : function (pData) {
$s("P7_FIELD2", pData);},beforeSend : function () {
$.mobile.loading("show");},complete : function () {
$.mobile.loading("hide");}
});
Testing and De-bugging
Browser Toolkit: Emulation
Emulate (Chrome):• Device• Network Throttle• Touch Events
Demowhen time allows and connection works …
Remote Debuggingon Android with Chrome
Demo
Questions & Discussion
http://rokitta.blogspot.com
@crokitta
http://www.themes4apex.com
? ? ?
http://plus.google.com/+ChristianRokitta
http://nl.linkedin.com/in/rokit/
