获得应用使用的位置（无线定位系统）
下面是如何使用的WiFi定位可以定期获得位置。这段代码将使您获得使用WiFi定位设备位置的定期更新。PRIVILEGE需要：http://tizen.org/privilege/location
// PRIVILEGE needed to be set in tizen-manifest.xml:
// http://tizen.org/privilege/location
#include <locations.h>
#include <dlog.h> // for logging purposes
// Declaring location manager (in this example it is a global variable):
location_manager_h location_manager;
// Defining callback function for location update
// The callback will be called periodically, as defined during callback registration.
void position_updated_cb(double latitude, double longitude, double altitude, time_t timestamp, void *user_data)
{
LOGI("Location update: Latitude: %f, Longitude: %f, timestamp: %d", latitude, longitude, timestamp);
}
// On startup of your service:
void startup()
{
// Creating location manager for WiFi Positioning System
// The LOCATIONS_METHOD_WPS setting means that this location manager will use
// only WiFi networks to check the device's location.
if(location_manager_create(LOCATIONS_METHOD_WPS, &location_manager) == LOCATIONS_ERROR_NONE)
{
LOGI("Location manager created.");
// Setting callback for position update - update will be done every 15 seconds.
if (location_manager_set_position_updated_cb(location_manager, position_updated_cb, 15, NULL) == LOCATIONS_ERROR_NONE)
{
LOGI("Location position update callback added.");
}
// Starting service
if(location_manager_start(location_manager)== LOCATIONS_ERROR_NONE)
{
LOGI("Location service started.");
}
}
}
// On shutdown of your service:
void shutdown()
{
//unset the callback
if (location_manager_unset_position_updated_cb(location_manager) == LOCATIONS_ERROR_NONE)
{
LOGI("Callback unregistered.");
}
// It is not necessary to call location_manager_stop() just before calling
// location_manager_destroy because the service is stopped automatically
// before destruction.
if (location_manager_destroy(location_manager) == LOCATIONS_ERROR_NONE)
{
LOGI("Location manager destroyed.");
}
location_manager = NULL;
}
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