[android] - safe guard making asyncrhonous calls to map object while it's beeing destroyed (#7613)

1 files changed, 311 insertions, 4 deletions

diff --git a/platform/android/MapboxGLAndroidSDK/src/main/java/com/mapbox/mapboxsdk/maps/NativeMapView.java b/platform/android/MapboxGLAndroidSDK/src/main/java/com/mapbox/mapboxsdk/maps/NativeMapView.java
index 8300e8024b..05d1bf1750 100755
--- a/platform/android/MapboxGLAndroidSDK/src/main/java/com/mapbox/mapboxsdk/maps/NativeMapView.java
+++ b/platform/android/MapboxGLAndroidSDK/src/main/java/com/mapbox/mapboxsdk/maps/NativeMapView.java
@@ -9,6 +9,7 @@ import android.graphics.RectF;
 import android.os.Build;
 import android.support.annotation.NonNull;
 import android.support.annotation.Nullable;
+import android.text.TextUtils;
 import android.util.DisplayMetrics;
 import android.view.Surface;
 
@@ -16,6 +17,7 @@ import com.mapbox.mapboxsdk.annotations.Icon;
 import com.mapbox.mapboxsdk.annotations.Marker;
 import com.mapbox.mapboxsdk.annotations.Polygon;
 import com.mapbox.mapboxsdk.annotations.Polyline;
+import com.mapbox.mapboxsdk.constants.MapboxConstants;
 import com.mapbox.mapboxsdk.geometry.LatLng;
 import com.mapbox.mapboxsdk.geometry.ProjectedMeters;
 import com.mapbox.mapboxsdk.offline.OfflineManager;
@@ -102,6 +104,15 @@ final class NativeMapView {
   // Methods
   //
 
+  private boolean isDestroyedOn(String callingMethod) {
+    if (destroyed && !TextUtils.isEmpty(callingMethod)) {
+      Timber.e(String.format(MapboxConstants.MAPBOX_LOCALE,
+        "You're calling `%s` after the `MapView` was destroyed, were you invoking it after `onDestroy()`?",
+        callingMethod));
+    }
+    return destroyed;
+  }
+
   public void destroy() {
     nativeDestroy(nativeMapViewPtr);
     nativeMapViewPtr = 0;
@@ -109,43 +120,66 @@ final class NativeMapView {
     destroyed = true;
   }
 
-  public boolean wasDestroyed() {
-    return destroyed;
-  }
-
   public void initializeDisplay() {
+    if (isDestroyedOn("initializeDisplay")) {
+      return;
+    }
     nativeInitializeDisplay(nativeMapViewPtr);
   }
 
   public void terminateDisplay() {
+    if (isDestroyedOn("terminateDisplay")) {
+      return;
+    }
     nativeTerminateDisplay(nativeMapViewPtr);
   }
 
   public void initializeContext() {
+    if (isDestroyedOn("initializeContext")) {
+      return;
+    }
     nativeInitializeContext(nativeMapViewPtr);
   }
 
   public void terminateContext() {
+    if (isDestroyedOn("terminateContext")) {
+      return;
+    }
     nativeTerminateContext(nativeMapViewPtr);
   }
 
   public void createSurface(Surface surface) {
+    if (isDestroyedOn("createSurface")) {
+      return;
+    }
     nativeCreateSurface(nativeMapViewPtr, surface);
   }
 
   public void destroySurface() {
+    if (isDestroyedOn("destroySurface")) {
+      return;
+    }
     nativeDestroySurface(nativeMapViewPtr);
   }
 
   public void update() {
+    if (isDestroyedOn("update")) {
+      return;
+    }
     nativeUpdate(nativeMapViewPtr);
   }
 
   public void render() {
+    if (isDestroyedOn("render")) {
+      return;
+    }
     nativeRender(nativeMapViewPtr);
   }
 
   public void resizeView(int width, int height) {
+    if (isDestroyedOn("resizeView")) {
+      return;
+    }
     width = (int) (width / pixelRatio);
     height = (int) (height / pixelRatio);
 
@@ -174,6 +208,9 @@ final class NativeMapView {
   }
 
   public void resizeFramebuffer(int fbWidth, int fbHeight) {
+    if (isDestroyedOn("resizeFramebuffer")) {
+      return;
+    }
     if (fbWidth < 0) {
       throw new IllegalArgumentException("fbWidth cannot be negative.");
     }
@@ -195,159 +232,276 @@ final class NativeMapView {
   }
 
   public void addClass(String clazz) {
+    if (isDestroyedOn("addClass")) {
+      return;
+    }
     nativeAddClass(nativeMapViewPtr, clazz);
   }
 
   public void removeClass(String clazz) {
+    if (isDestroyedOn("removeClass")) {
+      return;
+    }
     nativeRemoveClass(nativeMapViewPtr, clazz);
   }
 
   public boolean hasClass(String clazz) {
+    if (isDestroyedOn("hasClass")) {
+      return false;
+    }
     return nativeHasClass(nativeMapViewPtr, clazz);
   }
 
   public void setClasses(List<String> classes) {
+    if (isDestroyedOn("setClasses")) {
+      return;
+    }
     nativeSetClasses(nativeMapViewPtr, classes);
   }
 
   public List<String> getClasses() {
+    if (isDestroyedOn("getClasses")) {
+      return new ArrayList<>();
+    }
     return nativeGetClasses(nativeMapViewPtr);
   }
 
   public void setStyleUrl(String url) {
+    if (isDestroyedOn("setStyleUrl")) {
+      return;
+    }
     nativeSetStyleUrl(nativeMapViewPtr, url);
   }
 
   public String getStyleUrl() {
+    if (isDestroyedOn("getStyleUrl")) {
+      return null;
+    }
     return nativeGetStyleUrl(nativeMapViewPtr);
   }
 
   public void setStyleJson(String newStyleJson) {
+    if (isDestroyedOn("setStyleJson")) {
+      return;
+    }
     nativeSetStyleJson(nativeMapViewPtr, newStyleJson);
   }
 
   public String getStyleJson() {
+    if (isDestroyedOn("getStyleJson")) {
+      return null;
+    }
     return nativeGetStyleJson(nativeMapViewPtr);
   }
 
   public void setAccessToken(String accessToken) {
+    if (isDestroyedOn("setAccessToken")) {
+      return;
+    }
     nativeSetAccessToken(nativeMapViewPtr, accessToken);
   }
 
   public String getAccessToken() {
+    if (isDestroyedOn("getAccessToken")) {
+      return null;
+    }
     return nativeGetAccessToken(nativeMapViewPtr);
   }
 
   public void cancelTransitions() {
+    if (isDestroyedOn("cancelTransitions")) {
+      return;
+    }
     nativeCancelTransitions(nativeMapViewPtr);
   }
 
   public void setGestureInProgress(boolean inProgress) {
+    if (isDestroyedOn("setGestureInProgress")) {
+      return;
+    }
     nativeSetGestureInProgress(nativeMapViewPtr, inProgress);
   }
 
   public void moveBy(double dx, double dy) {
+    if (isDestroyedOn("moveBy")) {
+      return;
+    }
     moveBy(dx, dy, 0);
   }
 
   public void moveBy(double dx, double dy, long duration) {
+    if (isDestroyedOn("moveBy")) {
+      return;
+    }
     nativeMoveBy(nativeMapViewPtr, dx / pixelRatio, dy / pixelRatio, duration);
   }
 
   public void setLatLng(LatLng latLng) {
+    if (isDestroyedOn("setLatLng")) {
+      return;
+    }
     setLatLng(latLng, 0);
   }
 
   public void setLatLng(LatLng latLng, long duration) {
+    if (isDestroyedOn("setLatLng")) {
+      return;
+    }
     nativeSetLatLng(nativeMapViewPtr, latLng.getLatitude(), latLng.getLongitude(), duration);
   }
 
   public LatLng getLatLng() {
+    if (isDestroyedOn("")) {
+      return new LatLng();
+    }
     return nativeGetLatLng(nativeMapViewPtr);
   }
 
   public void resetPosition() {
+    if (isDestroyedOn("resetPosition")) {
+      return;
+    }
     nativeResetPosition(nativeMapViewPtr);
   }
 
   public double getPitch() {
+    if (isDestroyedOn("getPitch")) {
+      return 0;
+    }
     return nativeGetPitch(nativeMapViewPtr);
   }
 
   public void setPitch(double pitch, long duration) {
+    if (isDestroyedOn("setPitch")) {
+      return;
+    }
     nativeSetPitch(nativeMapViewPtr, pitch, duration);
   }
 
   public void scaleBy(double ds) {
+    if (isDestroyedOn("scaleBy")) {
+      return;
+    }
     scaleBy(ds, Double.NaN, Double.NaN);
   }
 
   public void scaleBy(double ds, double cx, double cy) {
+    if (isDestroyedOn("scaleBy")) {
+      return;
+    }
     scaleBy(ds, cx, cy, 0);
   }
 
   public void scaleBy(double ds, double cx, double cy, long duration) {
+    if (isDestroyedOn("scaleBy")) {
+      return;
+    }
     nativeScaleBy(nativeMapViewPtr, ds, cx / pixelRatio, cy / pixelRatio, duration);
   }
 
   public void setScale(double scale) {
+    if (isDestroyedOn("setScale")) {
+      return;
+    }
     setScale(scale, Double.NaN, Double.NaN);
   }
 
   public void setScale(double scale, double cx, double cy) {
+    if (isDestroyedOn("setScale")) {
+      return;
+    }
     setScale(scale, cx, cy, 0);
   }
 
   public void setScale(double scale, double cx, double cy, long duration) {
+    if (isDestroyedOn("setScale")) {
+      return;
+    }
     nativeSetScale(nativeMapViewPtr, scale, cx / pixelRatio, cy / pixelRatio, duration);
   }
 
   public double getScale() {
+    if (isDestroyedOn("getScale")) {
+      return 0;
+    }
     return nativeGetScale(nativeMapViewPtr);
   }
 
   public void setZoom(double zoom) {
+    if (isDestroyedOn("setZoom")) {
+      return;
+    }
     setZoom(zoom, 0);
   }
 
   public void setZoom(double zoom, long duration) {
+    if (isDestroyedOn("setZoom")) {
+      return;
+    }
     nativeSetZoom(nativeMapViewPtr, zoom, duration);
   }
 
   public double getZoom() {
+    if (isDestroyedOn("getZoom")) {
+      return 0;
+    }
     return nativeGetZoom(nativeMapViewPtr);
   }
 
   public void resetZoom() {
+    if (isDestroyedOn("resetZoom")) {
+      return;
+    }
     nativeResetZoom(nativeMapViewPtr);
   }
 
   public void setMinZoom(double zoom) {
+    if (isDestroyedOn("setMinZoom")) {
+      return;
+    }
     nativeSetMinZoom(nativeMapViewPtr, zoom);
   }
 
   public double getMinZoom() {
+    if (isDestroyedOn("getMinZoom")) {
+      return 0;
+    }
     return nativeGetMinZoom(nativeMapViewPtr);
   }
 
   public void setMaxZoom(double zoom) {
+    if (isDestroyedOn("setMaxZoom")) {
+      return;
+    }
     nativeSetMaxZoom(nativeMapViewPtr, zoom);
   }
 
   public double getMaxZoom() {
+    if (isDestroyedOn("getMaxZoom")) {
+      return 0;
+    }
     return nativeGetMaxZoom(nativeMapViewPtr);
   }
 
   public void rotateBy(double sx, double sy, double ex, double ey) {
+    if (isDestroyedOn("rotateBy")) {
+      return;
+    }
     rotateBy(sx, sy, ex, ey, 0);
   }
 
   public void rotateBy(double sx, double sy, double ex, double ey,
                        long duration) {
+    if (isDestroyedOn("rotateBy")) {
+      return;
+    }
     nativeRotateBy(nativeMapViewPtr, sx / pixelRatio, sy / pixelRatio, ex, ey, duration);
   }
 
   public void setContentPadding(int[] padding) {
+    if (isDestroyedOn("setContentPadding")) {
+      return;
+    }
     nativeSetContentPadding(nativeMapViewPtr,
       padding[1] / pixelRatio,
       padding[0] / pixelRatio,
@@ -356,191 +510,323 @@ final class NativeMapView {
   }
 
   public void setBearing(double degrees) {
+    if (isDestroyedOn("setBearing")) {
+      return;
+    }
     setBearing(degrees, 0);
   }
 
   public void setBearing(double degrees, long duration) {
+    if (isDestroyedOn("setBearing")) {
+      return;
+    }
     nativeSetBearing(nativeMapViewPtr, degrees, duration);
   }
 
   public void setBearing(double degrees, double cx, double cy) {
+    if (isDestroyedOn("setBearing")) {
+      return;
+    }
     nativeSetBearingXY(nativeMapViewPtr, degrees, cx / pixelRatio, cy / pixelRatio);
   }
 
   public double getBearing() {
+    if (isDestroyedOn("getBearing")) {
+      return 0;
+    }
     return nativeGetBearing(nativeMapViewPtr);
   }
 
   public void resetNorth() {
+    if (isDestroyedOn("resetNorth")) {
+      return;
+    }
     nativeResetNorth(nativeMapViewPtr);
   }
 
   public long addMarker(Marker marker) {
+    if (isDestroyedOn("addMarker")) {
+      return 0;
+    }
     Marker[] markers = {marker};
     return nativeAddMarkers(nativeMapViewPtr, markers)[0];
   }
 
   public long[] addMarkers(List<Marker> markers) {
+    if (isDestroyedOn("addMarkers")) {
+      return new long[] {};
+    }
     return nativeAddMarkers(nativeMapViewPtr, markers.toArray(new Marker[markers.size()]));
   }
 
   public long addPolyline(Polyline polyline) {
+    if (isDestroyedOn("addPolyline")) {
+      return 0;
+    }
     Polyline[] polylines = {polyline};
     return nativeAddPolylines(nativeMapViewPtr, polylines)[0];
   }
 
   public long[] addPolylines(List<Polyline> polylines) {
+    if (isDestroyedOn("addPolylines")) {
+      return new long[] {};
+    }
     return nativeAddPolylines(nativeMapViewPtr, polylines.toArray(new Polyline[polylines.size()]));
   }
 
   public long addPolygon(Polygon polygon) {
+    if (isDestroyedOn("addPolygon")) {
+      return 0;
+    }
     Polygon[] polygons = {polygon};
     return nativeAddPolygons(nativeMapViewPtr, polygons)[0];
   }
 
   public long[] addPolygons(List<Polygon> polygons) {
+    if (isDestroyedOn("addPolygons")) {
+      return new long[] {};
+    }
     return nativeAddPolygons(nativeMapViewPtr, polygons.toArray(new Polygon[polygons.size()]));
   }
 
   public void updateMarker(Marker marker) {
+    if (isDestroyedOn("updateMarker")) {
+      return;
+    }
     LatLng position = marker.getPosition();
     Icon icon = marker.getIcon();
     nativeUpdateMarker(nativeMapViewPtr, marker.getId(), position.getLatitude(), position.getLongitude(), icon.getId());
   }
 
   public void updatePolygon(Polygon polygon) {
+    if (isDestroyedOn("updatePolygon")) {
+      return;
+    }
     nativeUpdatePolygon(nativeMapViewPtr, polygon.getId(), polygon);
   }
 
   public void updatePolyline(Polyline polyline) {
+    if (isDestroyedOn("updatePolyline")) {
+      return;
+    }
     nativeUpdatePolyline(nativeMapViewPtr, polyline.getId(), polyline);
   }
 
   public void removeAnnotation(long id) {
+    if (isDestroyedOn("removeAnnotation")) {
+      return;
+    }
     long[] ids = {id};
     removeAnnotations(ids);
   }
 
   public void removeAnnotations(long[] ids) {
+    if (isDestroyedOn("removeAnnotations")) {
+      return;
+    }
     nativeRemoveAnnotations(nativeMapViewPtr, ids);
   }
 
   public long[] queryPointAnnotations(RectF rect) {
+    if (isDestroyedOn("queryPointAnnotations")) {
+      return new long[] {};
+    }
     return nativeQueryPointAnnotations(nativeMapViewPtr, rect);
   }
 
   public void addAnnotationIcon(String symbol, int width, int height, float scale, byte[] pixels) {
+    if (isDestroyedOn("addAnnotationIcon")) {
+      return;
+    }
     nativeAddAnnotationIcon(nativeMapViewPtr, symbol, width, height, scale, pixels);
   }
 
   public void setVisibleCoordinateBounds(LatLng[] coordinates, RectF padding, double direction, long duration) {
+    if (isDestroyedOn("setVisibleCoordinateBounds")) {
+      return;
+    }
     nativeSetVisibleCoordinateBounds(nativeMapViewPtr, coordinates, padding, direction, duration);
   }
 
   public void onLowMemory() {
+    if (isDestroyedOn("onLowMemory")) {
+      return;
+    }
     nativeOnLowMemory(nativeMapViewPtr);
   }
 
   public void setDebug(boolean debug) {
+    if (isDestroyedOn("setDebug")) {
+      return;
+    }
     nativeSetDebug(nativeMapViewPtr, debug);
   }
 
   public void cycleDebugOptions() {
+    if (isDestroyedOn("cycleDebugOptions")) {
+      return;
+    }
     nativeToggleDebug(nativeMapViewPtr);
   }
 
   public boolean getDebug() {
+    if (isDestroyedOn("getDebug")) {
+      return false;
+    }
     return nativeGetDebug(nativeMapViewPtr);
   }
 
   public boolean isFullyLoaded() {
+    if (isDestroyedOn("isFullyLoaded")) {
+      return false;
+    }
     return nativeIsFullyLoaded(nativeMapViewPtr);
   }
 
   public void setReachability(boolean status) {
+    if (isDestroyedOn("setReachability")) {
+      return;
+    }
     nativeSetReachability(nativeMapViewPtr, status);
   }
 
   public double getMetersPerPixelAtLatitude(double lat) {
+    if (isDestroyedOn("getMetersPerPixelAtLatitude")) {
+      return 0;
+    }
     return nativeGetMetersPerPixelAtLatitude(nativeMapViewPtr, lat, getZoom());
   }
 
   public ProjectedMeters projectedMetersForLatLng(LatLng latLng) {
+    if (isDestroyedOn("projectedMetersForLatLng")) {
+      return null;
+    }
     return nativeProjectedMetersForLatLng(nativeMapViewPtr, latLng.getLatitude(), latLng.getLongitude());
   }
 
   public LatLng latLngForProjectedMeters(ProjectedMeters projectedMeters) {
+    if (isDestroyedOn("latLngForProjectedMeters")) {
+      return new LatLng();
+    }
     return nativeLatLngForProjectedMeters(nativeMapViewPtr, projectedMeters.getNorthing(),
       projectedMeters.getEasting());
   }
 
   public PointF pixelForLatLng(LatLng latLng) {
+    if (isDestroyedOn("pixelForLatLng")) {
+      return new PointF();
+    }
     PointF pointF = nativePixelForLatLng(nativeMapViewPtr, latLng.getLatitude(), latLng.getLongitude());
     pointF.set(pointF.x * pixelRatio, pointF.y * pixelRatio);
     return pointF;
   }
 
   public LatLng latLngForPixel(PointF pixel) {
+    if (isDestroyedOn("latLngForPixel")) {
+      return new LatLng();
+    }
     return nativeLatLngForPixel(nativeMapViewPtr, pixel.x / pixelRatio, pixel.y / pixelRatio);
   }
 
   public double getTopOffsetPixelsForAnnotationSymbol(String symbolName) {
+    if (isDestroyedOn("getTopOffsetPixelsForAnnotationSymbol")) {
+      return 0;
+    }
     return nativeGetTopOffsetPixelsForAnnotationSymbol(nativeMapViewPtr, symbolName);
   }
 
   public void jumpTo(double angle, LatLng center, double pitch, double zoom) {
+    if (isDestroyedOn("jumpTo")) {
+      return;
+    }
     nativeJumpTo(nativeMapViewPtr, angle, center.getLatitude(), center.getLongitude(), pitch, zoom);
   }
 
   public void easeTo(double angle, LatLng center, long duration, double pitch, double zoom,
                      boolean easingInterpolator) {
+    if (isDestroyedOn("easeTo")) {
+      return;
+    }
     nativeEaseTo(nativeMapViewPtr, angle, center.getLatitude(), center.getLongitude(), duration, pitch, zoom,
       easingInterpolator);
   }
 
   public void flyTo(double angle, LatLng center, long duration, double pitch, double zoom) {
+    if (isDestroyedOn("flyTo")) {
+      return;
+    }
     nativeFlyTo(nativeMapViewPtr, angle, center.getLatitude(), center.getLongitude(), duration, pitch, zoom);
   }
 
   public double[] getCameraValues() {
+    if (isDestroyedOn("getCameraValues")) {
+      return new double[] {};
+    }
     return nativeGetCameraValues(nativeMapViewPtr);
   }
 
   // Runtime style Api
 
   public Layer getLayer(String layerId) {
+    if (isDestroyedOn("getLayer")) {
+      return null;
+    }
     return nativeGetLayer(nativeMapViewPtr, layerId);
   }
 
   public void addLayer(@NonNull Layer layer, @Nullable String before) {
+    if (isDestroyedOn("")) {
+      return;
+    }
     nativeAddLayer(nativeMapViewPtr, layer.getNativePtr(), before);
   }
 
   public void removeLayer(@NonNull String layerId) throws NoSuchLayerException {
+    if (isDestroyedOn("removeLayer")) {
+      return;
+    }
     nativeRemoveLayerById(nativeMapViewPtr, layerId);
   }
 
   public void removeLayer(@NonNull Layer layer) throws NoSuchLayerException {
+    if (isDestroyedOn("removeLayer")) {
+      return;
+    }
     nativeRemoveLayer(nativeMapViewPtr, layer.getNativePtr());
   }
 
   public Source getSource(@NonNull String sourceId) {
+    if (isDestroyedOn("getSource")) {
+      return null;
+    }
     return nativeGetSource(nativeMapViewPtr, sourceId);
   }
 
   public void addSource(@NonNull Source source) {
+    if (isDestroyedOn("addSource")) {
+      return;
+    }
     nativeAddSource(nativeMapViewPtr, source.getNativePtr());
   }
 
   public void removeSource(@NonNull String sourceId) throws NoSuchSourceException {
+    if (isDestroyedOn("removeSource")) {
+      return;
+    }
     nativeRemoveSourceById(nativeMapViewPtr, sourceId);
   }
 
   public void removeSource(@NonNull Source source) throws NoSuchSourceException {
+    if (isDestroyedOn("removeSource")) {
+      return;
+    }
     nativeRemoveSource(nativeMapViewPtr, source.getNativePtr());
   }
 
   public void addImage(@NonNull String name, @NonNull Bitmap image) {
+    if (isDestroyedOn("addImage")) {
+      return;
+    }
     //Check/correct config
     if (image.getConfig() != Bitmap.Config.ARGB_8888) {
       image = image.copy(Bitmap.Config.ARGB_8888, false);
@@ -558,6 +844,9 @@ final class NativeMapView {
   }
 
   public void removeImage(String name) {
+    if (isDestroyedOn("removeImage")) {
+      return;
+    }
     nativeRemoveImage(nativeMapViewPtr, name);
   }
 
@@ -565,6 +854,9 @@ final class NativeMapView {
 
   @NonNull
   public List<Feature> queryRenderedFeatures(PointF coordinates, String... layerIds) {
+    if (isDestroyedOn("queryRenderedFeatures")) {
+      return new ArrayList<>();
+    }
     Feature[] features = nativeQueryRenderedFeaturesForPoint(nativeMapViewPtr, coordinates.x / pixelRatio,
       coordinates.y / pixelRatio, layerIds);
     return features != null ? Arrays.asList(features) : new ArrayList<Feature>();
@@ -572,6 +864,9 @@ final class NativeMapView {
 
   @NonNull
   public List<Feature> queryRenderedFeatures(RectF coordinates, String... layerIds) {
+    if (isDestroyedOn("queryRenderedFeatures")) {
+      return new ArrayList<>();
+    }
     Feature[] features = nativeQueryRenderedFeaturesForBox(
       nativeMapViewPtr,
       coordinates.left / pixelRatio,
@@ -583,10 +878,16 @@ final class NativeMapView {
   }
 
   public void scheduleTakeSnapshot() {
+    if (isDestroyedOn("scheduleTakeSnapshot")) {
+      return;
+    }
     nativeScheduleTakeSnapshot(nativeMapViewPtr);
   }
 
   public void setApiBaseUrl(String baseUrl) {
+    if (isDestroyedOn("setApiBaseUrl")) {
+      return;
+    }
     nativeSetAPIBaseURL(nativeMapViewPtr, baseUrl);
   }
 
@@ -833,10 +1134,16 @@ final class NativeMapView {
   private native void nativeSetAPIBaseURL(long nativeMapViewPtr, String baseUrl);
 
   int getWidth() {
+    if (isDestroyedOn("")) {
+      return 0;
+    }
     return mapView.getWidth();
   }
 
   int getHeight() {
+    if (isDestroyedOn("")) {
+      return 0;
+    }
     return mapView.getHeight();
   }