content: /*
   * Copyright (C) 2019  Ziwei Huang
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *      http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  package cn.forward.tiledmapview.layer.google;
  
  import android.graphics.Bitmap;
  import android.graphics.BitmapFactory;
  
  import cn.forward.tiledmapview.config.WebMercatorTileConfig;
  import cn.forward.tiledmapview.core.ITiledMapView;
  import cn.forward.tiledmapview.core.IProjection;
  import cn.forward.tiledmapview.layer.PicassoTileImageLoader;
  import cn.forward.tiledmapview.layer.TileImageCache;
  import cn.forward.tiledmapview.layer.TileLayer;
  import cn.forward.tiledmapview.projection.WebMercatorProjection;
  import cn.forward.tiledmapview.projection.Wgs84ToGcj02Transformation;
  
  /**
   * @author ziwei huang
   */
  public class GoogleTileLayer extends TileLayer {
  
      public GoogleTileLayer(ITiledMapView mapView, GoogleOnlineTileImageSource.ImgType imgType) {
          this(mapView, imgType, 2f, "zh-CN", new PicassoTileImageLoader());
      }
  
      public GoogleTileLayer(ITiledMapView mapView, GoogleOnlineTileImageSource.ImgType imgType, float scale, String language, TileImageCache.ITileImageLoader imageLoader) {
          Bitmap placeHolder = BitmapFactory.decodeResource(mapView.getContext().getResources(), cn.forward.tiledmapview.R.drawable.grid);
          initialize(mapView, new TileImageCache(mapView, new GoogleOnlineTileImageSource(imgType, scale, language), imageLoader, placeHolder));
  
          mapView.setTileConfig(new WebMercatorTileConfig(0, 17, scale));
          IProjection projection = new WebMercatorProjection(new Wgs84ToGcj02Transformation()); // 由于tile url有gl=CN参数，故需进行Wgs84ToGcj02Transformation
          mapView.setProjection(projection);
      }
  
  }
  