#include <sensor.h>
#include <dlog.h> // for logging purposes

//sensor event callback implementation
void sensor_event_callback(sensor_h sensor, sensor_event_s *event, void *user_data)
{
    sensor_type_e type;
    sensor_get_type(sensor, &type);
    if(type == SENSOR_ACCELEROMETER)
    {
        LOGI("accelerometer: %f, %f, %f", event->values[0], event->values[1], event->values[2]);
    }
}

//You must declare sensor handle and sensor listener handle.
sensor_h sensor;
sensor_listener_h listener;

//Starting sensor listener
sensor_type_e type = SENSOR_ACCELEROMETER;

if (sensor_get_default_sensor(type, &sensor) == SENSOR_ERROR_NONE)
{
    if (sensor_create_listener(sensor, &listener) == SENSOR_ERROR_NONE
        && sensor_listener_set_event_cb(listener, 100, sensor_event_callback, NULL) == SENSOR_ERROR_NONE)
    {
        if (sensor_listener_start(listener) == SENSOR_ERROR_NONE)
        {
            LOGI("sensor listener started!");
        }
    }
}

//Stopping sensor listener
int err = sensor_listener_stop(listener);
//handle error codes as you wish
err = sensor_destroy_listener(listener);