added compass drawables to the lib

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

LocationLib/src/com/TwentyCodes/android/location/CompasOverlay.java

@@ -91,22 +91,6 @@ public class CompasOverlay extends Overlay implements CompassListener {
 		this(context, null, needleResId, backgroundResId, x, y);
 	}
 
-	/**
-	 * Calculated the bearing from the current location to the current destination, or returns the bearing for north if there is no destination
-	 * @return bearing
-	 * @author ricky barrette
-	 */
-	private float calculateBearing() {
-		if( (mLocation == null) || (mDestination == null) )
-			return mBearing;
-		
-		float bearing = mBearing - GeoUtils.bearing(mLocation, mDestination).floatValue();
-		if (bearing != 0)
-			bearing = 360 - bearing;
-		
-		return bearing;
-	}
-	
 	/**
 	 * Converts dip to px
 	 * @param dip
@@ -152,7 +136,7 @@ public class CompasOverlay extends Overlay implements CompassListener {
 			//draw the compass needle
 	        Bitmap arrowBitmap = BitmapFactory.decodeResource( mContext.getResources(), mNeedleResId);
 	        Matrix matrix = new Matrix();
-	        matrix.postRotate(calculateBearing());
+	        matrix.postRotate(GeoUtils.calculateBearing(mLocation, mDestination, mBearing));
 	        Bitmap rotatedBmp = Bitmap.createBitmap(
 	            arrowBitmap, 
 	            0, 0, 

LocationLib/src/com/TwentyCodes/android/location/GeoUtils.java

@@ -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

LocationLib/src/com/TwentyCodes/android/location/UserOverlay.java

@@ -52,6 +52,7 @@ public class UserOverlay extends Overlay implements GeoPointLocationListener, Co
 	private CompasOverlay mCompass;
 	private boolean isCompassEnabled;
 	private boolean isGPSDialogEnabled;
+	private CompassListener mCompassListener;
 	
 	/**
 	 * Construct a new SkyHookUserOverlaymFollowUser
@@ -262,20 +263,21 @@ public class UserOverlay extends Overlay implements GeoPointLocationListener, Co
 			new Handler().postAtTime(new Runnable() {
 				@Override
 				public void run() {
-					if (mGPSprogress.isShowing()) {
-						mGPSprogress.cancel();
-						AlertDialog.Builder builder = new AlertDialog.Builder(mContext);
-						builder.setMessage(
-								mContext.getText(R.string.sorry_theres_trouble))
-								.setCancelable(false)
-								.setPositiveButton(mContext.getText(android.R.string.ok),
-										new DialogInterface.OnClickListener() {
-											public void onClick( DialogInterface dialog, int id) {
-												dialog.cancel();
-											}
-										});
-						builder.show();
-					}
+					if(mGPSprogress != null)
+						if (mGPSprogress.isShowing()) {
+							mGPSprogress.cancel();
+							AlertDialog.Builder builder = new AlertDialog.Builder(mContext);
+							builder.setMessage(
+									mContext.getText(R.string.sorry_theres_trouble))
+									.setCancelable(false)
+									.setPositiveButton(mContext.getText(android.R.string.ok),
+											new DialogInterface.OnClickListener() {
+												public void onClick( DialogInterface dialog, int id) {
+													dialog.cancel();
+												}
+											});
+							builder.show();
+						}
 				}
 			}, SystemClock.uptimeMillis()+90000L);
 		}
@@ -313,6 +315,8 @@ public class UserOverlay extends Overlay implements GeoPointLocationListener, Co
 	public void onCompassUpdate(float bearing) {
 		if(Debug.DEBUG)
 			Log.v(TAG, "onCompassUpdate()");
+		if(mCompassListener != null)
+			mCompassListener.onCompassUpdate(bearing);
 		mBearing = bearing;
 		mMapView.invalidate();
 	}
@@ -420,6 +424,14 @@ public class UserOverlay extends Overlay implements GeoPointLocationListener, Co
 		mCompass.setDrawables(needleResId, backgroundResId, x, y);
 	}
 	
+	/**
+	 * Sets the CompassListener
+	 * @param listener
+	 * @author ricky barrette
+	 */
+	public void setCompassListener(CompassListener listener){
+		mCompassListener = listener;
+	}
 	
 	/**
 	 * This thread is responsible for animating the user icon