Blackberry JAVA DEVELOPMENT ENVIRONMENT - - GPS AND MAPS - DEVELOPMENT GUIDE Manual do Utilizador descarregar pdf (Página 25)

For RIM and BlackBerry partner use only. Beta documentation. Content and software are subject to change.

3: Displaying location information on a BlackBerry device

Clear data specific to a location document with an id attribute

You can only remove data from a map that is from a location document that has an id attribute in the <lbs>

element.

>Create a String that sets the clear attribute to the id of the location document that contains the data to

remove from a map.

String document = "<lbs clear='Montreal' ><location lon='-7938675' lat='4367022'

label='Toronto, ON' description='Toronto' zoom='10'/></lbs>";

Clear data specific to all location documents with an id attribute

You can only remove data from a map that is from a location document that has an id attribute in the <lbs>

element.

>Create a String that sets the clear attribute to Docs.

String document = "<lbs clear='Docs' ><location lon='-7938675' lat='4367022'

label='Toronto, ON' description='Toronto' zoom='10'/></lbs>";

Clear data specific to specific location documents with an id attribute

You can only remove data from a map that is from a location document that has an id attribute in the <lbs>

element.

>Create a String that sets the clear attribute to a comma-delimited list of ids, for example

String document = "<lbs clear='MONTREAL','OTTAWA' ><location lon='-7938675'

lat='4367022' label='Toronto, ON' description='Toronto' zoom='10'/></lbs>";

Clear all location data from a map

You can only remove data from a map that is from a location document that has an id attribute in the <lbs>

element.

>Create a String that sets the clear attribute to Locations, for example

String document = "<lbs clear='Locations' ><location lon='-7938675' lat='4367022'

label='Toronto, ON' description='Toronto' zoom='10'/></lbs>";

Displaying location information in your application

A BlackBerry® Application can use the MapField class to display a map in a UI field. For a BlackBerry Application

to use the

MapField class, BlackBerry® Maps must be installed on the BlackBerry device and the BlackBerry

device must be able to download data from a location-based services map server.

A MapField gets data either from a location-based services map server or the BlackBerry device with BlackBerry

Maps installed. If location information is not present on the BlackBerry device, the

MapField requests data from

the location-based services map server. See the API reference for the BlackBerry Java Development Environment

for more information about the MapField API.

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Blackberry JAVA DEVELOPMENT ENVIRONMENT - - GPS AND MAPS - DEVELOPMENT GUIDE Manual do Utilizador Página 25