[android] #5934 - resolves memory leaks on animators + location listeners

platform/android/MapboxGLAndroidSDK/src/main/java/com/mapbox/mapboxsdk/maps/MapView.java

@@ -1493,6 +1493,14 @@ public class MapView extends FrameLayout {
         if (mMapboxMap.getUiSettings().isZoomControlsEnabled()) {
             mZoomButtonsController.setVisible(false);
         }
+
+        // make sure we don't leak location listener
+        if (mMyLocationListener != null) {
+            // cleanup to prevent memory leak
+            LocationServices services = LocationServices.getLocationServices(getContext());
+            services.removeLocationListener(mMyLocationListener);
+            mMyLocationListener = null;
+        }
     }
 
     // Called when view is hidden and shown

platform/android/MapboxGLAndroidSDK/src/main/java/com/mapbox/mapboxsdk/maps/widgets/MyLocationView.java

@@ -320,11 +320,6 @@ public class MyLocationView extends View {
         setBearing(position.bearing);
     }
 
-    public void onPause() {
-        compassListener.onPause();
-        toggleGps(false);
-    }
-
     public void onResume() {
         if (myBearingTrackingMode == MyBearingTracking.COMPASS) {
             compassListener.onResume();
@@ -334,6 +329,37 @@ public class MyLocationView extends View {
         }
     }
 
+    public void onPause() {
+        compassListener.onPause();
+        toggleGps(false);
+    }
+
+    @Override
+    protected void onDetachedFromWindow() {
+        super.onDetachedFromWindow();
+        // cleanup to prevent memory leaks
+        if (locationChangeAnimator != null) {
+            locationChangeAnimator.cancel();
+            locationChangeAnimator = null;
+        }
+
+        if (accuracyAnimator != null) {
+            accuracyAnimator.cancel();
+            accuracyAnimator = null;
+        }
+
+        if (directionAnimator != null) {
+            directionAnimator.cancel();
+            directionAnimator = null;
+        }
+
+        if (userLocationListener != null) {
+            LocationServices services = LocationServices.getLocationServices(getContext());
+            services.removeLocationListener(userLocationListener);
+            userLocationListener = null;
+        }
+    }
+
     public void update() {
         if (isEnabled()) {
             myLocationBehavior.invalidate();