How To Work Osmdroid With Web Map Service (wms) Used By The Private Provider?

I'm trying to put the OSMDroid to work with WMS, but I do not find a way to put the WMS working. Objective: OSMDroid working with WMS (projection EPSG:4326) Tentative: I followed t

Solution 1:

You need to convert the ESPG:4326 to WebMercantor BB format. I have successfully used this code for doing that:

/*
* Sources http://wiki.openstreetmap.org/wiki/Slippy_map_tilenames
* code based on  https://www.azavea.com/blog/2013/01/14/wms-on-android/
*/publicclassWebMercatorBoundingBox {
    double north;
    double south;
    double east;   
    double west;


    // Web Mercator n/w corner of the map.privatestaticfinaldouble[] TILE_ORIGIN = {-20037508.34789244,    20037508.34789244};
    //array indexes for that dataprivatestaticfinalintORIG_X=0;
    privatestaticfinalintORIG_Y=1; // "// Size of square world map in meters, using WebMerc projection.privatestaticfinaldoubleMAP_SIZE=20037508.34789244 * 2;

    protectedWebMercatorBoundingBox(finalint x, finalint y, finalint zoom) {
        north = tile2lat(y, zoom);
        south = tile2lat(y + 1, zoom);
        west = tile2lon(x, zoom);
        east = tile2lon(x + 1, zoom);
    }
    doubletile2lon(int x, int z) {
        doubletileSize= MAP_SIZE / Math.pow(2.0, z);
        return  TILE_ORIGIN[ORIG_X] + x * tileSize;
    }

    doubletile2lat(int y, int z) {
        doubletileSize= MAP_SIZE / Math.pow(2.0, z);
        return TILE_ORIGIN[ORIG_Y] - y * tileSize;
    }

    publicdoublegetNorth(){
        returnthis.north;
    }
    publicdoublegetSouth(){
        returnthis.south;
    }
    publicdoublegetEast(){
        returnthis.east;
    }
    publicdoublegetWest(){
        returnthis.west;
    }

}

Then you can create a tile with a WMSTileProvider source which extends the OnlineTileSourceBase and overrides the getTileURLString by converting it to the X,Y,Zoom to WebMercatorBoundingBox.

publicclassTileProviderFactory{

     publicstaticWMSTileProvidergetWmsTileProvider(String version, String url, String layers, String fileFormat) {
        String[] baseUrl = {url};
        final StringWMS_FORMAT_STRING =
            url +
            "?service=WMS" +
            "&version=" + version +
            "&request=GetMap" +
            "&LAYERS=" + layers +
            "&bbox=%f,%f,%f,%f" +
            "&width=256" +
            "&height=256" +
            "&srs=EPSG:3857" +
            "&format=" + fileFormat;

    WMSTileProvider tileProvider = newWMSTileProvider(baseUrl, 256) {

        @OverridepublicStringgetTileURLString(MapTile mapTile) {
            WebMercatorBoundingBox bb = newWebMercatorBoundingBox(mapTile.getX(), mapTile.getY(),     mapTile.getZoomLevel());
                String s = String.format(
                        Locale.ENGLISH,
                        WMS_FORMAT_STRING,
                        bb.getWest(),
                        bb.getSouth(),
                        bb.getEast(),
                        bb.getNorth());
               Log.d(TAG,"Fetching map tile: " + s);
               return s;
           }
        };
        return tileProvider;
    }
}


publicabstractclassWMSTileProviderextendsOnlineTileSourceBase {

    // cql filtersprivateString cqlString = "";

    // Construct with tile size in pixels, normally 256, see parent class.publicWMSTileProvider(String[] baseurl, int tileSizeInPixels) {
        super("WMS tile source", 0 ,20,tileSizeInPixels,"png",baseurl);

    }

    protectedStringgetCql() {
        returnURLEncoder.encode(cqlString);
    }

    publicvoidsetCql(String c) {
        cqlString = c;
    }

}