Android上的Graphhopper脱机路由pbf文件错误

Question

    public void setRouting(){
    File dir = new File(Environment.getExternalStorageDirectory(),"osmdroid");
    File osmFile=new File(dir,"offline-map.osm.pbf");

    if(!osmFile.exists()){
        AlertDialog.Builder builder = new AlertDialog.Builder(this);
        builder.setMessage("File doesn't exist").setTitle("Error");
        AlertDialog dialog = builder.create();
        dialog.show();
        return;
    }


    GraphHopper hopper = new GraphHopper().forMobile();
    hopper.setEncodingManager(encodingManager);
    hopper.setGraphHopperLocation(getApplicationContext().getFilesDir().getPath());
    hopper.setOSMFile(osmFile.getAbsolutePath());
    hopper.setCHShortcuts("fastest");
    hopper.importOrLoad();
}

./graphhopper.sh import <your-osm-file>    

null

hopper = new GraphHopper().forMobile();
hopper.setCHShortcuts("fastest");
hopper.load(ghDir.getAbsolutePath());

（我希望我没有忘记任何事情：）