diff --git a/app/src/main/java/org/ntlab/amaryllis/client/fragment/MapsFragment.java b/app/src/main/java/org/ntlab/amaryllis/client/fragment/MapsFragment.java
index 680755a..0e4c0d5 100644
--- a/app/src/main/java/org/ntlab/amaryllis/client/fragment/MapsFragment.java
+++ b/app/src/main/java/org/ntlab/amaryllis/client/fragment/MapsFragment.java
@@ -32,10 +32,12 @@
 import com.google.android.gms.maps.CameraUpdateFactory;
 import com.google.android.gms.maps.GoogleMap;
 import com.google.android.gms.maps.OnMapReadyCallback;
+import com.google.android.gms.maps.Projection;
 import com.google.android.gms.maps.SupportMapFragment;
 import com.google.android.gms.maps.model.CameraPosition;
 import com.google.android.gms.maps.model.LatLng;
 import com.google.android.gms.maps.model.MarkerOptions;
+import com.google.android.gms.maps.model.VisibleRegion;
 
 import org.ntlab.amaryllis.client.Amaryllis;
 import org.ntlab.amaryllis.client.MainActivity;
@@ -109,10 +111,11 @@
 //            String longitude = amaryllis.getLongitude();
 //            double latitude1 = Double.parseDouble(latitude);
 //            double longitude1 = Double.parseDouble(longitude);
-            LatLng sydney = new LatLng(35, 135);
-//            MapsFragment.this=
-            googleMap.addMarker(new MarkerOptions().position(sydney).title("Marker in Sydney"));
-            googleMap.moveCamera(CameraUpdateFactory.newLatLng(sydney));
+
+
+
+            MapsFragment.this.googlemap = googleMap;
+
         }
     };
 
@@ -175,20 +178,35 @@
 
     @Override
     public void onLocationChanged(Location location) {
-        Log.d("DEBUG", "lat : " + location.getLatitude());
-        Log.d("DEBUG", "lon : " + location.getLongitude());
-        Call<ArrayList<Voicememo>> call = voicememosService.getVoicememos(latmax,latmin,longmax,longmin);
-        call.enqueue(new Callback<ArrayList<Voicememo>>() {
-            @Override
-            public void onResponse(Call<ArrayList<Voicememo>> call, Response<ArrayList<Voicememo>> response) {
+        if(googlemap != null) {
+            Log.d("DEBUG", "lat : " + location.getLatitude());
+            Log.d("DEBUG", "lon : " + location.getLongitude());
+            LatLng sydney = new LatLng(location.getLatitude(), location.getLongitude());
+            MapsFragment.this.googlemap.addMarker(new MarkerOptions().position(sydney).title("Marker in Sydney"));
+            MapsFragment.this.googlemap.moveCamera(CameraUpdateFactory.newLatLng(sydney));
+            Projection p = googlemap.getProjection();
+            VisibleRegion vr = p.getVisibleRegion();
+            latmax = vr.latLngBounds.northeast.latitude;
+            latmin = vr.latLngBounds.southwest.latitude;
+            longmax = vr.latLngBounds.northeast.longitude;
+            longmin = vr.latLngBounds.southwest.longitude;
+//            System.out.println(latmax + "!!!!!!!!!!!!!");
+//            System.out.println(latmin + "!!!!!!!!!!!!!");
+//            System.out.println(longmax + "!!!!!!!!!!!!!");
+//            System.out.println(longmin + "!!!!!!!!!!!!!");
+            Call<ArrayList<Voicememo>> call = voicememosService.getVoicememos(latmax, latmin, longmax, longmin);
+            call.enqueue(new Callback<ArrayList<Voicememo>>() {
+                @Override
+                public void onResponse(Call<ArrayList<Voicememo>> call, Response<ArrayList<Voicememo>> response) {
 
-            }
+                }
 
-            @Override
-            public void onFailure(Call<ArrayList<Voicememo>> call, Throwable t) {
+                @Override
+                public void onFailure(Call<ArrayList<Voicememo>> call, Throwable t) {
 
-            }
-        });
+                }
+            });
+        }
 
     }