Simple application to calculate distancefromcurrent location to a designated target on Google Map. Usersimplyclick a target on the map, the great circle distance betweentwopoints 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 toavoidrounding error
- Retain zoom factor onResume