GPS Library in J2ME
This is the first and
only free and open source API for cell phones that provides the
possibility to build locationsbased applications on cell phones that use
a Bluetooth GPS device.
It is originally a
license work for the
What it does: It makes
much easier the programming of J2ME applications that need to get coordinates
or other informations from a Bluetooth GPS receiver.
This API makes the Bluetooth connexion with the GPS device simpler, and
manages automatically the messages it sends so you can get the coordinates,
as well as others informations like direction, speed, informations on the fix and informations
on the satellites in view of the receiver. And because it's in J2ME, it can be
used on any phone who meets the requirements.
It also provides some
methods to convert the coordinates between the coordinate systems of the GPS
(WSG84) and other coordinates systems (Swiss, French Lambert's and Belgian
Lambert at the moment). It can also calculate the distance between two points.
There is a tracker who can record the coordinates every x seconds and save those
records into a file in a format which can be open with other programs such as ArcExplorer to show the patch on a map.
Moreover you can
configure your GPS receiver with the API by using simple methods. You can activate
or deactivate SBAS (WASS/EGNOS), DGPS, set the rate of the NMEA sentences and
switch between the SiRF and NMEA protocols.
An example of a
saved record opened with ArcExplorer.
Requirements: - A cell phone with CLDC
1.1, JSR82.
- JSR75 (optional).
- A Bluetooth GPS receiver.
This zip archive contains the library, the javadoc, some examples of code and a complete testing
application.
|
|
|
|
|
Some pictures from the testing program.
You can also download the report of our work, wich contains informations about this API, the testing application and explainations about the GPS and coordinates systems (in french).