[android] - zoom to rounded levels

1 files changed, 8 insertions, 4 deletions

diff --git a/platform/android/MapboxGLAndroidSDK/src/main/java/com/mapbox/mapboxsdk/maps/Transform.java b/platform/android/MapboxGLAndroidSDK/src/main/java/com/mapbox/mapboxsdk/maps/Transform.java
index 0f6b146907..2a81ad6752 100644
--- a/platform/android/MapboxGLAndroidSDK/src/main/java/com/mapbox/mapboxsdk/maps/Transform.java
+++ b/platform/android/MapboxGLAndroidSDK/src/main/java/com/mapbox/mapboxsdk/maps/Transform.java
@@ -182,13 +182,17 @@ final class Transform implements MapView.OnMapChangedListener {
     // Cancel any animation
     cancelTransitions();
 
-    if (zoomIn) {
-      mapView.scaleBy(2.0, x, y, MapboxConstants.ANIMATION_DURATION);
-    } else {
-      mapView.scaleBy(0.5, x, y, MapboxConstants.ANIMATION_DURATION);
+    CameraPosition cameraPosition = invalidateCameraPosition();
+    if (cameraPosition != null) {
+      zoom(cameraPosition, zoomIn, x, y);
     }
   }
 
+  private void zoom(@NonNull CameraPosition cameraPosition, boolean zoomIn, float x, float y) {
+    int newZoom = (int) Math.round(cameraPosition.zoom + (zoomIn ? 1 : -1));
+    mapView.setZoom(newZoom, x, y, MapboxConstants.ANIMATION_DURATION);
+  }
+
   void setZoom(double zoom) {
     mapView.setZoom(zoom);
   }