on Compass Accuracy Change
  This gets invoked when the compass accuracy status changes from one value to another. It provides an integer value which is identical to the SensorManager class constants: 
- SENSOR_STATUS_NO_CONTACT
 - SENSOR_STATUS_UNRELIABLE
 - SENSOR_STATUS_ACCURACY_LOW
 - SENSOR_STATUS_ACCURACY_MEDIUM
 - SENSOR_STATUS_ACCURACY_HIGH
 
Parameters
compass Status
the new accuracy of this sensor, one of SensorManager.SENSOR_STATUS_*