使用osmdroid6.0.2加载谷歌、高德、天地图等瓦片地图

研究了一星期多的Osmdroid6.0.2，深感这个开源的android地图包强大，因为使用其他瓦片涉及知识产权，请大家谨慎使用，本文只做研究测试。

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新建GoogleTileSource类继承org.osmdroid.tileprovider.tilesource.TileSourceFactory类，具体对应的资源都有注释

public class GoogleTileSource extends TileSourceFactory {
    //谷歌卫星混合
    public static final OnlineTileSourceBase GoogleHybrid = new XYTileSource("Google-Hybrid",
            0, 19, 512, ".png", new String[]{
            "http://mt0.google.cn",
            "http://mt1.google.cn",
            "http://mt2.google.cn",
            "http://mt3.google.cn",

    }) {
        @Override
        public String getTileURLString(long pMapTileIndex) {
            Log.d("url", getBaseUrl() + "/vt/lyrs=y&scale=2&hl=zh-CN&gl=CN&src=app&x=" + MapTileIndex.getX(pMapTileIndex) + "&y=" + MapTileIndex.getY(pMapTileIndex) + "&z=" + MapTileIndex.getZoom(pMapTileIndex));
            return getBaseUrl() + "/vt/lyrs=y&scale=2&hl=zh-CN&gl=CN&src=app&x=" + MapTileIndex.getX(pMapTileIndex) + "&y=" + MapTileIndex.getY(pMapTileIndex) + "&z=" + MapTileIndex.getZoom(pMapTileIndex);
        }
    };
    
    //谷歌卫星
    public static final OnlineTileSourceBase GoogleSat = new XYTileSource("Google-Sat",
            0, 19, 512, ".png", new String[]{
            "http://mt0.google.cn",
            "http://mt1.google.cn",
            "http://mt2.google.cn",
            "http://mt3.google.cn",

    }) {
        @Override
        public String getTileURLString(long pMapTileIndex) {

            return getBaseUrl() + "/vt/lyrs=s&scale=2&hl=zh-CN&gl=CN&src=app&x=" + MapTileIndex.getX(pMapTileIndex) + "&y=" + MapTileIndex.getY(pMapTileIndex) + "&z=" + MapTileIndex.getZoom(pMapTileIndex);

        }
    };
    //谷歌地图
    public static final OnlineTileSourceBase GoogleRoads = new XYTileSource("Google-Roads",
            0, 18, 512, ".png", new String[]{
            "http://mt0.google.cn",
            "http://mt1.google.cn",
            "http://mt2.google.cn",
            "http://mt3.google.cn",

    }) {
        @Override
        public String getTileURLString(long pMapTileIndex) {
            return getBaseUrl() + "/vt/lyrs=m&scale=2&hl=zh-CN&gl=CN&src=app&x=" + MapTileIndex.getX(pMapTileIndex) + "&y=" + MapTileIndex.getY(pMapTileIndex) + "&z=" + MapTileIndex.getZoom(pMapTileIndex);
        }
    };
    //谷歌地形
    public static final OnlineTileSourceBase GoogleTerrain = new XYTileSource("Google-Terrain",
            0, 16, 512, ".png", new String[]{
            "http://mt0.google.cn",
            "http://mt1.google.cn",
            "http://mt2.google.cn",
            "http://mt3.google.cn",

    }) {
        @Override
        public String getTileURLString(long pMapTileIndex) {
            return getBaseUrl() + "/vt/lyrs=t&scale=2&hl=zh-CN&gl=CN&src=app&x=" + MapTileIndex.getX(pMapTileIndex) + "&y=" + MapTileIndex.getY(pMapTileIndex) + "&z=" + MapTileIndex.getZoom(pMapTileIndex);
        }
    };
    //谷歌地形带标注
    public static final OnlineTileSourceBase GoogleTerrainHybrid = new XYTileSource("Google-Terrain-Hybrid",
            0, 16, 512, ".png", new String[]{
            "http://mt0.google.cn",
            "http://mt1.google.cn",
            "http://mt2.google.cn",
            "http://mt3.google.cn",

    }) {
        @Override
        public String getTileURLString(long pMapTileIndex) {
            return getBaseUrl() + "/vt/lyrs=p&scale=2&hl=zh-CN&gl=CN&src=app&x=" + MapTileIndex.getX(pMapTileIndex) + "&y=" + MapTileIndex.getY(pMapTileIndex) + "&z=" + MapTileIndex.getZoom(pMapTileIndex);
        }
    };
    //高德地图
    public static final OnlineTileSourceBase AutoNaviVector = new XYTileSource("AutoNavi-Vector",
            0, 20, 256, ".png", new String[]{
            "https://wprd01.is.autonavi.com/appmaptile?",
            "https://wprd02.is.autonavi.com/appmaptile?",
            "https://wprd03.is.autonavi.com/appmaptile?",
            "https://wprd04.is.autonavi.com/appmaptile?",

    }) {
        @Override
        public String getTileURLString(long pMapTileIndex) {
            return getBaseUrl() + "x=" + MapTileIndex.getX(pMapTileIndex) + "&y=" + MapTileIndex.getY(pMapTileIndex) + "&z="
                    + MapTileIndex.getZoom(pMapTileIndex)+"&lang=zh_cn&size=1&scl=1&style=7&ltype=7";
        }
    };
    //影像地图 _W是墨卡托投影  _c是国家2000的坐标系
    public static final OnlineTileSourceBase tianDiTuImgTileSource = new XYTileSource("TianDiTuImg", 1, 18, 768, ".png",
            new String[]{"http://t1.tianditu.com/DataServer?T=img_w",
                    "http://t2.tianditu.com/DataServer?T=img_w",
                    "http://t3.tianditu.com/DataServer?T=img_w",
                    "http://t4.tianditu.com/DataServer?T=img_w",
                    "http://t5.tianditu.com/DataServer?T=img_w",
                    "http://t6.tianditu.com/DataServer?T=img_w"}) {
        @Override
        public String getTileURLString(final long pMapTileIndex) {
            return getBaseUrl() + "&X=" + MapTileIndex.getX(pMapTileIndex) + "&Y=" + MapTileIndex.getY(pMapTileIndex)
                    + "&L=" + MapTileIndex.getZoom(pMapTileIndex);
        }
    };

    //影像标注 _W是墨卡托投影  _c是国家2000的坐标系
    public static final OnlineTileSourceBase tianDiTuCiaTileSource = new XYTileSource("TianDiTuCia", 1, 18, 768, ".png",
            new String[]{"http://t1.tianditu.com/DataServer?T=cia_w",
                    "http://t2.tianditu.com/DataServer?T=cia_w",
                    "http://t3.tianditu.com/DataServer?T=cia_w",
                    "http://t4.tianditu.com/DataServer?T=cia_w",
                    "http://t5.tianditu.com/DataServer?T=cia_w",
                    "http://t6.tianditu.com/DataServer?T=cia_w"}) {
        @Override
        public String getTileURLString(final long pMapTileIndex) {
            Log.d("url", getBaseUrl() + "&X=" + MapTileIndex.getX(pMapTileIndex) + "&Y=" + MapTileIndex.getY(pMapTileIndex)
                    + "&L=" + MapTileIndex.getZoom(pMapTileIndex));
            return getBaseUrl() + "&X=" + MapTileIndex.getX(pMapTileIndex) + "&Y=" + MapTileIndex.getY(pMapTileIndex)
                    + "&L=" + MapTileIndex.getZoom(pMapTileIndex);
        }
    };

}

然后在主程序MainActivity中的mapview中使用如下代码：

        map = (MapView) findViewById(R.id.map);
        map.setTileSource(GoogleTileSource.MAPNIK)

因为是继承的，所以原来包中自带的OpenStreetMap、OpenSea的瓦片资源都可以继续引用。

问题：

• 为了保密高德、谷歌.cn、天地图使用的是GCJ02（火星坐标系），手机gps数据是WGS-84坐标系，需要进行转换。
• 为什么没有百度，因为百度的瓦片分割和高德谷歌都不一样，还有百度使用的自己的BD09坐标系 即百度坐标系，估计GCJ02坐标系经加密后的坐标系。