added geofencing stuff

app/src/main/java/com/a1/nextlocation/data/Data.java

@@ -11,6 +11,15 @@ public enum Data {
     private int locationsVisited = 0;
     private long totalTime = 0;
     private double zoom = 0;
+    private LocationProximityListener locationProximityListener;
+
+    public LocationProximityListener getLocationProximityListener() {
+        return locationProximityListener;
+    }
+
+    public void setLocationProximityListener(LocationProximityListener locationProximityListener) {
+        this.locationProximityListener = locationProximityListener;
+    }
 
     public double getZoom() {
         return zoom;
@@ -50,5 +59,10 @@ public enum Data {
         return locationsVisited;
     }
 
+    @FunctionalInterface
+    public interface LocationProximityListener {
+        void onLocationVisited(Location location);
+    }
+
 
 }

app/src/main/java/com/a1/nextlocation/data/Location.java

@@ -25,6 +25,8 @@ public class Location implements Parcelable {
     private String imageUrl;
     private String iconUrl;
 
+    private boolean visited;
+
     public Location(@NotNull String name, String coordinates, String description, @Nullable String imageUrl) {
         this.name = name;
         this.coordinates = coordinates;
@@ -171,4 +173,12 @@ public class Location implements Parcelable {
         parcel.writeString(description);
         parcel.writeString(imageUrl);
     }
+
+    public boolean isVisited() {
+        return visited;
+    }
+
+    public void setVisited(boolean visited) {
+        this.visited = visited;
+    }
 }