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Downloading Applications
Methods of Downloading
There are two options open to the developer for deploying the MIDlet to a physical
Motorola device. These are OTA (over -the-air) downloading or direct cable (Serial)
downloading through a PC to the target device.
Method 1 - OTA
To use the OTA method, the developer will have a connection through a wireless network
to a content server. This content server could be, for example, Apache
(http://httpd.apache.org)
and has extensive documentation on how to configure the platform.
The required file will be downloaded (either .jad and/or .jar) by issuing a direct URL
request to the file in question or it could be a URL request to a WAP page and a hyperlink
on that page to the target file. This request will be made through the Motorola Internet
Browser (MIB). In MIDP 2.0, the need for a JAD file before download is not required, so
the JAR file can be downloaded directly. The information about the MIDlet will be pulled
from the manifest file.
The transport mechanism used to download the file will be one of two depending on the
support from the network operators WAP Gateway and the size of file requested.
During a download of the application, the user will see the MIB 2.2.1 browser displaying
'Downloading' followed by "x% completed" for either SAR or HTTP Byte Range type
downloads.
A complete guide for setting up an OTA server can be obtained through the
MOTOCODER website (http://www.motocoder.com). This includes details of configuring
the server and also example WAP pages.
20
which is free to use, deployable on multiple operating systems,
HTTP Range – see specification RFC 2068 at
if content greater than 30k in size. Below is a ladder diagram showing the flow
through HTTP range transfer, although recall use of the .JAD is optional.
SAR (Segmentation & Reassembly) – see specification of wireless transaction
protocol at the
http://www.wapforum.org
http://www.rfc-editor.org/rfc.html
if less than 30k in size.
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