Optimized RemoveAnnotations to a single call

android/java/MapboxGLAndroidSDK/src/main/java/com/mapbox/mapboxgl/annotations/Annotation.java

@@ -23,7 +23,7 @@ public abstract class Annotation {
         return alpha;
     }
 
-    public long getId() {
+    public Long getId() {
         return id;
     }
 

android/java/MapboxGLAndroidSDK/src/main/java/com/mapbox/mapboxgl/annotations/Marker.java

@@ -49,17 +49,6 @@ public class Marker extends Annotation {
         return anchorV;
     }
 
-    /**
-     * NOTE: Google Maps Android API uses String for IDs.
-     *
-     * Internal C++ id is stored as unsigned int.
-     *
-     * @return the annotation id
-     */
-    public long getId() {
-        return id;
-    }
-
     public LatLng getPosition() {
         return position;
     }

android/java/MapboxGLAndroidSDK/src/main/java/com/mapbox/mapboxgl/views/MapView.java

@@ -270,9 +270,16 @@ public class MapView extends SurfaceView {
     }
 
     public void removeAnnotations() {
-        for (Annotation annotation : annotations) {
-            annotation.remove();
+        long[] ids = new long[annotations.size()];
+        for(int i=0; i<annotations.size(); i++) {
+            Long id = annotations.get(i).getId();
+            if(id == null) {
+                ids[i] = -1;
+            } else {
+                ids[i] = id;
+            }
         }
+        mNativeMapView.removeAnnotations(ids);
     }
 
     //

android/java/MapboxGLAndroidSDK/src/main/java/com/mapbox/mapboxgl/views/NativeMapView.java

@@ -239,6 +239,10 @@ class NativeMapView {
         nativeRemoveAnnotation(mNativeMapViewPtr, id);
     }
 
+    public void removeAnnotations(long[] ids) {
+        nativeRemoveAnnotations(mNativeMapViewPtr, ids);
+    }
+
     public LatLng getLatLng() {
         return nativeGetLatLng(mNativeMapViewPtr);
     }
@@ -481,6 +485,8 @@ class NativeMapView {
 
     private native void nativeRemoveAnnotation(long nativeMapViewPtr, long id);
 
+    private native void nativeRemoveAnnotations(long nativeMapViewPtr, long[] id);
+
     private native LatLng nativeGetLatLng(long nativeMapViewPtr);
 
     private native void nativeResetPosition(long nativeMapViewPtr);