Hi I am working on Android Sensor in which user can change the Sensor type. If user chooses the magnetic north direction then how can the application shows the needle direction? Basically my question is to calculate the degree of rotation of compass needle to show the magnetic north. I am implementing the SensorEventListner and override the method onSensorChanged(). this method has parameter Sensor and this parameter has value for x, y and z axis. Now after getting all these values what is formula to show the magnetic north and true north.
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