compass-geolocation
Calculate compass bearing / heading to location in Android
Ok I figured this out. For anyone else trying to do this you need: a) heading: your heading from the hardware compass. This is in degrees east of magnetic north b) bearing: the bearing from your location to the destination location. This is in degrees east of true north. myLocation.bearingTo(destLocation); c) declination: the difference between … Read more
Android phone orientation overview including compass
You might want to check out the One Screen Turn Deserves Another article. It explains why you need the rotation matrix. In a nutshell, the phone’s sensors always use the same coordinate system, even when the device is rotated. In applications that are not locked to a single orientation, the screen coordinate system changes when … Read more