添加时标记抛出错误，如何解决？

Question

我正在尝试使用此处的sdk添加照片标记，但它会引发空点错误，我不明白为什么它是空指针错误或代码错误？

目录图像：https://i.stack.imgur.com/c7J4v.jpg

 private void loadMapScene() {
        // Load a scene from the SDK to render the map with a map style.
        mapView.getMapScene().loadScene(MapStyle.NORMAL_DAY, new MapScene.LoadSceneCallback() {
            @Override
            public void onLoadScene(@Nullable MapScene.ErrorCode errorCode) {
                if (errorCode == null) {
                    mapView.getCamera().setTarget(new GeoCoordinates(17.3850, 78.4867));
                    mapView.getCamera().setZoomLevel(14);

                    GeoCoordinates geoCoordinates= new GeoCoordinates(17.3850, 78.4867);

                    MapImage mapImage = MapImageFactory.fromResource(context.getResources(), R.drawable.here_car);

                    MapMarker mapMarker = new MapMarker(geoCoordinates);
                    mapMarker.addImage(mapImage, new MapMarkerImageStyle());

                    mapView.getMapScene().addMapMarker(mapMarker);



                } else {
                    Log.d(TAG, "onLoadScene failed: " + errorCode.toString());
                }
            }
        });


    }

编辑1错误：

W/System.err: java.lang.NullPointerException: Attempt to invoke virtual method 'android.content.res.Resources android.content.Context.getResources()' on a null object reference
W/System.err:     at com.example.death.MainActivity$7.onLoadScene(MainActivity.java:272)
        at com.here.sdk.core.threading.RunnableImpl.run(Native Method)
        at com.here.sdk.core.threading.MainThreadTaskRunner.a(Unknown Source:10)
        at com.here.sdk.core.threading.MainThreadTaskRunner.lambda$93nD-I9pqERpDgqXkXMj7C0moag(Unknown Source:0)
        at com.here.sdk.core.threading.-$$Lambda$MainThreadTaskRunner$93nD-I9pqERpDgqXkXMj7C0moag.run(Unknown Source:4)
        at android.os.Handler.handleCallback(Handler.java:873)
        at android.os.Handler.dispatchMessage(Handler.java:99)
        at android.os.Looper.loop(Looper.java:193)

Answer 1

似乎您错过了设置context的位置。试试这个：

Context context = MainActivity.this;
Resources resources = context.getResources();
MapImage mapImage = MapImageFactory.fromResource(resources, R.drawable.here_car);

根据堆栈跟踪，您正在从您的主要活动中执行此操作。

Answer 2

尝试像这样添加图像作为标记：

BitmapDescriptor icon = BitmapDescriptorFactory.fromResource(R.drawable.her_car)

MarkerOptions markerOptions = new MarkerOptions().position(latLng)
         .title("Current Location")
         .snippet("")
         .icon(icon);

mMarker = googleMap.addMarker(markerOptions);

希望这会有所帮助！