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问GoogleMaps CancelableCallback不会更改我的相机角度和位置。我做错了什么？
EN

Stack Overflow用户

提问于 2020-12-18 23:45:07

回答 1查看 43关注 0票数 0

我已经添加了放置在onMapReady()中的相机位置和动画回调。

CameraPosition cameraPosition =
               new CameraPosition.Builder()
                       .target(new LatLng(currentRoute.locations.get(1).getLatitude(),
                               currentRoute.locations.get(1).getLongitude()))
                       .tilt(60)
                       .bearing((float)currentRoute.getRouteEdges().getFirst().getHeading(currentRoute.getStart(), currentRoute.getFinish())-40)
                       .zoom(20)
                       .build();

       CameraUpdate update = (CameraUpdateFactory.newCameraPosition(cameraPosition));

       turnByTurnMap.animateCamera(update, new GoogleMap.CancelableCallback() {
           @Override
           public void onFinish() {
               if(currentPosition<currentRoute.locations.size()-1){
                   float bearing = HelperMethods.latLongToLocationDouble(currentRoute.locations.get(currentPosition).getLatitude(),
                           currentRoute.locations.get(currentPosition).getLongitude()).bearingTo(HelperMethods.latLongToLocationDouble(currentRoute.locations.get(currentPosition+1).getLatitude(),
  currentRoute.locations.get(currentPosition+1).getLongitude()));
                   CameraPosition cameraPosition =
                           new CameraPosition.Builder()
                                   .target(new LatLng(currentRoute.locations.get(currentPosition).getLatitude(),
                                           currentRoute.locations.get(currentPosition).getLongitude()))
                                   .tilt(60)
                                   .bearing(bearing)
                                   .zoom(20)
                                   .build();
                   currentPosition++;
               }
           }

           @Override
           public void onCancel() {

           }
       });

为什么摄像机不能沿着这些位置移动。位置数组中有8个位置。为什么摄像头没有更新？

编辑:我已经将animateCamera添加到回调中，但是回调从未被调用过。我重新发布了当前的实现，我已经在回调中登录，但它从未被调用过？

CameraPosition cameraPosition =
                new CameraPosition.Builder()
                        .target(new LatLng(currentRoute.locations.get(1).getLatitude(),
                                currentRoute.locations.get(1).getLongitude()))
                        .tilt(60)
                        .bearing((float)currentRoute.getRouteEdges().getFirst().getHeading(currentRoute.getStart(), currentRoute.getFinish())-40)
                        .zoom(20)
                        .build();

        CameraUpdate update = (CameraUpdateFactory.newCameraPosition(cameraPosition));

        turnByTurnMap.animateCamera(update,
                3000,
                routeAnimationCancelableCallback);

        routeAnimationCancelableCallback = new GoogleMap.CancelableCallback() {

            @Override
            public void onCancel() {

            }
            @Override
            public void onFinish() {
                Log.d(TAG, "onFinish: here");
                if(currentPosition<currentRoute.locations.size()-1){
                    float bearing = HelperMethods.latLongToLocationDouble(currentRoute.locations.get(currentPosition+1).getLatitude(),
                            currentRoute.locations.get(currentPosition+1).getLongitude()).bearingTo(HelperMethods.latLongToLocationDouble(currentRoute.locations.get(currentPosition+1).getLatitude(),
                            currentRoute.locations.get(currentPosition+2).getLongitude()));
                    CameraPosition cameraPosition =
                            new CameraPosition.Builder()
                                    .target(new LatLng(currentRoute.locations.get(currentPosition+1).getLatitude(),
                                            currentRoute.locations.get(currentPosition+1).getLongitude()))
                                    .tilt(60)
                                    .bearing(bearing)
                                    .zoom(10)
                                    .build();
                    CameraUpdate update = (CameraUpdateFactory.newCameraPosition(cameraPosition));

                    turnByTurnMap.animateCamera(update,
                            3000,
                            routeAnimationCancelableCallback);
                    currentPosition++;
                }


            }
        };

java

android

google-maps

回答 1

Stack Overflow用户

回答已采纳

发布于 2020-12-21 02:22:14

考虑到第二个代码发布，只需在设置routeAnimationCancelableCallback之后将初始调用移动到animateCamera。这还包括在回调中调用animateCamera的初始修复。

    // initial call to animateCamera was here...


    routeAnimationCancelableCallback = new GoogleMap.CancelableCallback() {

        @Override
        public void onCancel() {

        }
        @Override
        public void onFinish() {
            Log.d(TAG, "onFinish: here");
            if(currentPosition<currentRoute.locations.size()-1){
                float bearing = HelperMethods.latLongToLocationDouble(currentRoute.locations.get(currentPosition+1).getLatitude(),
                        currentRoute.locations.get(currentPosition+1).getLongitude()).bearingTo(HelperMethods.latLongToLocationDouble(currentRoute.locations.get(currentPosition+1).getLatitude(),
                        currentRoute.locations.get(currentPosition+2).getLongitude()));
                CameraPosition cameraPosition =
                        new CameraPosition.Builder()
                                .target(new LatLng(currentRoute.locations.get(currentPosition+1).getLatitude(),
                                        currentRoute.locations.get(currentPosition+1).getLongitude()))
                                .tilt(60)
                                .bearing(bearing)
                                .zoom(10)
                                .build();
                CameraUpdate update = (CameraUpdateFactory.newCameraPosition(cameraPosition));

                turnByTurnMap.animateCamera(update,
                        3000,
                        routeAnimationCancelableCallback);
                currentPosition++;
            }


        }
    };


    // and moved to here...

    turnByTurnMap.animateCamera(update,
            3000,
            routeAnimationCancelableCallback);

票数 0

页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持

原文链接：

https://stackoverflow.com/questions/65359906

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