CPI greater than one means over budget, less than one means under budget & equal to one means same as per budget.
Sensor Manager: This class provides methods regarding the registration of sensor event listeners, the management of data acquisition, and calibration. It also provides methods for accessing and listing sensors.
Sensor: This class creates an instance of a specific sensor, providing methods that allow you to determine its capabilities.
SensorEvent: This class provides information on a sensor event by creating a sensor event object.
SensorEventListener: This interface provides two callback methods that can receive notifications of sensor events.
