Distance Finder

Simple application to calculate distance from current location to a designated target on Google Map. User simply click a target on the map, the great circle distance between two points is then calculated.

Reference: http://en.wikipedia.org/wiki/Great-circle_distance
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ChangeLog V1.0.1 - V1.0.4
- add clear button.
- update distance upon location changed.
- To make the line between two points 2 px width.
- Replace distance calculation using haversine formula to avoid rounding error
- Retain zoom factor onResume