protected Path saveDoInBackground(Void... v) throws Exception { GraphHopper tmpHopp = new GraphHopper().forMobile(); tmpHopp.load(new File(mapsFolder, currentArea).getAbsolutePath() + "-gh"); log("found graph " + tmpHopp.getGraphHopperStorage().toString() + ", nodes:" + tmpHopp.getGraphHopperStorage().getNodes()); hopper = tmpHopp; return null; }