Compass is a sample android application which implements trivial compass functionality. It was created just as a code snippet reuse in some of my projects.

The main feature of the compass is noise filter (Low-pass filter) which make the arrow more stable in comparison to other similar applications where arrow always trembles.

You can install it from google play: https://play.google.com/store/apps/details?id=com.sevencrayons.compass

Enhancements are welcome!

TODO:

• customization of place to point, see dev branch for details
• better, correct graphics
• relevant layout for different devices (tablets)
• insert an instructon about how to calibrate device sensors

How to Build

• launch Android Studio
• select Open an existing Android Studio project
• select the project folder
• select menu Run -> Run 'app'

Articles to Learn

• http://stackoverflow.com/questions/12800982/accelerometer-with-low-passfilter-in-android
• http://developer.android.com/reference/android/hardware/Sensor.html#TYPE_ACCELEROMETER
• http://stackoverflow.com/questions/1884699/android-compass-noise-algorithm
• http://en.wikipedia.org/wiki/Low-pass_filter