android百度地图自定义marker，使用网络图片

由于提供的基础marker只提供icon，所以如果marker需要显示更多信息，就需要自定义View
使用网络图片标记marker，需要等图片加载完毕再添加marker

for (GridPoint gridPoint : pointList) {
    //这个是自定义marker 视图，和普通视图一样
    View inflate = LayoutInflater.from(MapGridActivity.this).inflate(R.layout.map_point_marker, null);
    ImageView imageView = inflate.findViewById(R.id.iv_point);
    TextView textView = inflate.findViewById(R.id.tv_point);
    Glide.with(MapGridActivity.this)
            .asBitmap()
            .load(Constant.FILE_URL+gridPoint.getMapPointType().getShowImage())
            .into(new SimpleTarget<Bitmap>() {
                @Override
                public void onResourceReady(@NonNull Bitmap resource, @Nullable Transition<? super Bitmap> transition) {
                    LatLng point = new LatLng(gridPoint.getLat(), gridPoint.getLon());
                    imageView.setImageBitmap(resource);
                    textView.setText(gridPoint.getName());
                    baiduMap.addOverlay(new MarkerOptions()
                    .position(point)
                    .icon(BitmapDescriptorFactory.fromView(inflate)));
                }
            });