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added compass drawables to the lib

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CompasOverlay.java
updated all methods that set mX and mY to use dip instead of px
updated default drawables to compass_sm.png and needle_sm.png

added RadiusOverlay.java and LocationSelectedListener.java to the library
This commit is contained in:
Ricky Barrette
2012-01-12 13:30:48 +00:00
parent d2d643afe6
commit 5cf1e61c6c
46 changed files with 86 additions and 59 deletions
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28
LocationLib/src/com/TwentyCodes/android/location/GeoUtils.java
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@@ -37,6 +37,30 @@ public class GeoUtils {
public static final int EARTH_RADIUS_KM = 6371;
public static final double MILLION = 1000000;
/**
* Calculates the bearing from the user location to the destination location, or returns the bearing for north if there is no destination.
* This method is awesome for make a compass point toward the destination rather than North.
* @param user location
* @param dest location
* @param bearing Degrees East from compass
* @return Degrees East of dest location
* @author ricky barrette
*/
public static float calculateBearing(GeoPoint user, GeoPoint dest, float bearing) {
if( (user == null) || (dest == null) )
return bearing;
float heading = bearing(user, dest).floatValue();
bearing = (360 - heading) + bearing;
if (bearing > 360)
return bearing - 360;
return bearing;
}
/**
* computes the bearing of lat2/lon2 in relationship from lat1/lon1 in degrees East
@@ -44,7 +68,7 @@ public class GeoUtils {
* @param lon1 source lon
* @param lat2 destination lat
* @param lon2 destination lon
* @return the bearing of lat2/lon2 in relationship from lat1/lon1 in degrees East
* @return the bearing of lat2/lon2 in relationship from lat1/lon1 in degrees East of true north
* @author Google Inc.
*/
public static double bearing(double lat1, double lon1, double lat2, double lon2) {
@@ -57,7 +81,7 @@ public class GeoUtils {
}
/**
* computes the bearing of lat2/lon2 in relationship from lat1/lon1 in degrees East
* computes the bearing of lat2/lon2 in relationship from lat1/lon1 in degrees East of true north
* @param p1 source geopoint
* @param p2 destination geopoint
* @return the bearing of p2 in relationship from p1 in degrees East