Save google map for offline use

Question

I am doing a project on Google map. My requirement is to save the Google map when online and to use in offline mode. In Ios, they used GMSTileURLConstructor. In the same, Is there any probabilities to save map. If yes, can you provide me any idea or link.

    -(void)ViewOfflineMap
    {
          GMSTileURLConstructor urls = ^(NSUInteger x, NSUInteger y, NSUInteger zoom) {
               NSString *strMap=[NSString      stringWithFormat:@"http://mt0.google.com/vt/x=%ld&y=%ld&z=%ld",(long)x,(long)y,(long)zoom];
               return [NSURL URLWithString:strMap];
          };

    GMSURLTileLayer *layer=[GMSURLTileLayer tileLayerWithURLConstructor:urls];
    layer.zIndex=100;
    layer.map=mapView_;
    }

Thanks in advance.

Answer 1

I have one solution. We can save map as tiles using UrlTileProvider. It saves the map tiles, based on the zooming level and x and y axis covered area in your screen.

TileProvider tileProvider = new UrlTileProvider(256, 256) {
    @Override
    public URL getTileUrl(int x, int y, int zoom) {

        String s = String.format(
                "http://my.image.server/images/%d%d%d.png", zoom, x, y);

        if (!checkTileExists(x, y, zoom)) {
            return null;
        }

        try {
            return new URL(s);
        } catch (MalformedURLException e) {
            throw new AssertionError(e);
        }
    }

    private boolean checkTileExists(int x, int y, int zoom) {
        int minZoom = 12;
        int maxZoom = 16;

        if ((zoom < minZoom || zoom > maxZoom)) {
            return false;
        }

        return true;

    }
};

tileOverlay = map.addTileOverlay(new TileOverlayOptions()
        .tileProvider(tileProvider));