|Version 76 (modified by 8 years ago) ( diff ),|
Blueprint for Mobile Clients
Table of Contents
We want a versatile client for Mobile devices to be able to talk to Sahana Eden servers which can be easily maintained and adapted to meet new requirements rather than the point solutions which have been developed to date which are unmaintained & not adaptable.
The ideal would be the ability to generate the code using the same core framework and data models. XForms are promising here, although our current XForm interface isn't complete (doesn't handle either Images or Locations) and can only handle data entry, not reporting.
The simplest way to do this is to provide a layout for the web application suitable for smaller screens:
An initial protoype should be developed in static HTML/CSS which can then be ported to Eden.
- download a couple of pages' HTML & CSS & tweak the CSS until it is fully resizable.
Ideally, though, they should have local storage for use completely offline & then be able to sync back to the server using whatever connectivity becomes available:
- compressed multi-part SMS to get maximal throughput
- forms should be updatable via SMS
- photos should stay offline until the phone has better connectivity, but then the photo needs to be used to update the same record
- J2ME eedocs:
- Python docs:
- J2ME eedocs:
Using the open XForms standard means that we can support handsets using both Android & J2ME.
- Written in Django, so should be easy to port to Sahana Eden:
- Written in GWT, so includable in Eden as a simple HTML page:
- Written in Ruby Rack, so harder to integrate as-is:
XForms can be submitted using SMS by including the encoding format within the XForm so that client & server agree on the encoding:
Documentation on the current implementation is here: http://wiki.sahanafoundation.org/phase2/doku.php/dev:j2meclient
- This needs updating to the latest version of JavaRosa
This supports using Mesh4j to do synchronisation via SMS:
Another XForms/J2MEPolish client (Xfolite):
KUIX can be used to develop lightweight applications which work across may handhelds & forms can be customised easily via XML/CSS:
Old, un-maintained J2ME client for the PHP back-end, which just uses XML-RPC (=> requires Internet):
Sahana Software Foundation have a developer license which can be used by anyone interested in developing this.
This has a lot of industry backing for a truly cross-platform solution:
Cross-platform (Android/iPhone) HTML5 environment based on ExtJS
OpenLayers now has touch support:
On our map, the Panning/Zooming works already, but Popups cannot be clicked yet.
We'd also like to move the LayerTree to a native-style widget.
Taking the Map offline:
- iPhone: http://www.offmaps.com
OpenStreetMap on Android:
Google Latitude would make an excellent Mobile Presence tool: