Getting magnetic field results as degrees

by Mark Murphy » Tue, 15 Dec 2009 08:45:31 GMT


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That's because you don't.

 http://github.com/commonsguy/cw-advandroid/tree/master/Sensor/Compass/ 

Or, to quote from the docs:

"Sensor.TYPE_ORIENTATION:

All values are angles in degrees.

values[0]: Azimuth, angle between the magnetic north direction and the Y
axis, around the Z axis (0 to 359). 0=North, 90=East, 180=South, 270=West"

 http://developer.android.com/reference/android/hardware/SensorEvent.html 

What you are trying to do is not use the compass
(Sensor.TYPE_ORIENTATION), but rather the raw magnetic field
(Sensor.TYPE_MAGNETIC_FIELD). *That* might need trigonometry to achieve
what you need, but I suspect the vast majority of things that need the
compass can just use the degrees supplied by the compass.

-- 
Mark Murphy (a Commons Guy)
 http://commonsware.com  |  http://twitter.com/commonsguy 

Android Consulting/App Development:  http://commonsware.com/consulting 

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