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GoogleTileLayer.java
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GoogleTileLayer.java
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/*
* 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);
}
}