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BlackBerry Java Development Environment Development Guide

Retrieve BlackBerry device GPS location information

Task Steps

Specify a response time for retrieving the

location of the BlackBerry® device.

The time it takes to retrieve the location of the BlackBerry device for the first time depends on

several factors, such as the selected GPS mode and the GPS signal strength. In autonomous

method, typical times are less than 2 minutes. In assisted mode, typical times are less than 30

seconds.

>Invoke Criteria.setPreferredResponseTime(), providing the desired response time

in milliseconds.

Retrieve the location information for a

BlackBerry device.

> In a non-event thread, invoke LocationProvider.getLocation(int), providing a

timeout in seconds.

try {

// Specify -1 to have the implementation use its default timeout value

// for this provider.

Location location = provider.getLocation(-1);

} catch (Exception e) {

// handle LocationException, InterruptedException, SecurityException

// and IllegalArgumentException

}

Retrieve the speed of a BlackBerry

device.

1. Invoke location.getQualifiedCoordinates, storing the returned object in a

QualifiedCoordinates object.

QualifiedCoordinates coordinates = location.getQualifiedCoordinates;

2. Invoke location.getSpeed().

float speed = location.getSpeed();

Retrieve the course of a BlackBerry

device.

1. Invoke location.getQualifiedCoordinates, storing the returned object in a

QualifiedCoordinates object.

QualifiedCoordinates coordinates = location.getQualifiedCoordinates;

2. Invoke location.getCourse().

float course = location.getCourse();

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Blackberry JAVA DEVELOPMENT ENVIRONMENT - - CRYPTOGRAPHIC SMART CARD DRIVER - DEVELOPMENT GUIDE Průvodce řešením problémů Strana 204