Question

我想要可见的标记（例如默认的Google地图）放置图标可见性。 在默认地图中，图标的可见性根据地图相机的缩放级别和相机位置而更改。更改相机位置时，其他人可以看到该特定区域的图标。现在，我从SQLite数据库中获取了可见区域的数据，但是我从地图上删除了所有标记，然后再次添加。因此，在此过程中，标记会闪烁（删除并再次添加）。

我的代码：

@Override
public void onCameraIdle() {
    Log.i("TAG", "onCameraIdle");
    if (cameraMoveReason == REASON_GESTURE) {
        LatLngBounds bounds = mGoogleMap.getProjection().getVisibleRegion().latLngBounds;
        double minLat;
        double maxLat;
        double minLng;
        double maxLng;
        if (bounds.northeast.latitude > bounds.southwest.latitude) {
            minLat = bounds.southwest.latitude;
            maxLat = bounds.northeast.latitude;
        } else {
            minLat = bounds.northeast.latitude;
            maxLat = bounds.southwest.latitude;
        }

        if (bounds.northeast.longitude > bounds.southwest.longitude) {
            minLng = bounds.southwest.longitude;
            maxLng = bounds.northeast.longitude;
        } else {
            minLng = bounds.northeast.longitude;
            maxLng = bounds.southwest.longitude;
        }

        LocationDAO locationDAO = new LocationDAO(getActivity());
        //Fetching data from SQLite database with latlng bounds
        ArrayList<LocationDTO> locationDTOArrayList = locationDAO.getLocations(minLat, maxLat, minLng, maxLng);
        googleMap.clear();
        for (LocationDTO locationDTO : locationDTOArrayList) {
            LatLng latLng = new LatLng(locationDTO.getLatitude(), locationDTO.getLongitude());

            Bitmap sourceBitmap = BitmapFactory.decodeResource(activity.getResources(),
                    R.drawable.ic_location_white);
            Bitmap bitmapIcon = changeBitmapColor(sourceBitmap, Color.parseColor(locationDTO.getColor()));


            Marker marker = googleMap.addMarker(new MarkerOptions().position(latLng)
                    .icon(BitmapDescriptorFactory.fromBitmap(bitmapIcon)));
            marker.setSnippet(String.valueOf(locationDTOArrayList.indexOf(locationDTO)));
            marker.setTag(locationDTOArrayList.indexOf(locationDTO));
        }
        cameraMoveReason = -1;
    }
}

@Override
public void onCameraMoveCanceled() {
    Log.i("TAG", "onCameraMoveCanceled");
}

@Override
public void onCameraMoveStarted(int i) {
    cameraMoveReason = i;
    Log.i("TAG", "onCameraMoveStarted : " + i);
}

请提出一些建议，以实现流畅的图标可见性。

Check the video to understand my requirement

如何显示默认的Android Google Map Places图标之类的标记

0 个答案: