How To Create Osmdroid Xytilesource For Offline Tiles In Version 4.1?

I have offline osmdroid maps working using version 4.0. Upgrading to 4.1, they no longer work. I have narrowed the problem down to the XYTileSource, in which aBaseUrl changed from

Solution 1:

I tried to provide a full answer here: Download maps for osmdroid

If you have an "old" tiles.zip, open it, and check:

• the root directory name => put it as the "aName" of XYTileSource constructor (is it really "tiles"?)
• the tiles images extension => put it as the aImageFileNameEnding (is it really ".png"?)

The aResourceId and aBaseUrl params are not used for zip files.

Solution 2:

I see that you are using XYTileSource, which by default extends OnlineTileSourceBase.

I have found a workaround for the Url issue, by creating a CustomTileSource class. Something like below:

publicclassCustomTileSourceextendsOnlineTileSourceBase{

publicstaticString[] TILE_URL = {"my_url"};

//constructor is default - I changed nothing herepublic CustomTileSource (String aName, string aResourceId, int aZoomMinLevel, int aZoomMaxLevel,
            int aTileSizePixels, String aImageFilenameEnding, String[] url) {
        super(
                aName,
                aResourceId,
                aZoomMinLevel,
                aZoomMaxLevel,
                aTileSizePixels,
                aImageFilenameEnding,
                url);
        // TODO Auto-generated constructor stub
    }

    /**
     * returns the url for each tile, depending on zoom level
     *///this is where I changed the return statement to take the first url from the string array of urls
    @Override
    publicString getTileURLString(MapTile aTile) {
        return TILE_URL[0] + aTile.getX() + "+" + aTile.getY() + "+" + aTile.getZoomLevel();
    }
}

In my code, where I need to instantiate the tilesource, I use:

 CustomTileSource  tileSource = new CustomTileSource ("Default", ResourceProxy.string.offline_mode, MIN_ZOOM_LVL, MAX_ZOOM_LVL, DEFAULT_TILE_SIZE, TILE_FORMAT, CustomTileSource.TILE_URL);
//MIN_ZOOM_LVL, MAX_ZOOM_LVL, DEFAULT_TILE_SIZE, TILE_FORMAT are constants that I defined elsewhere

Hope it helps.