Your code is well but its only the String of in path variable.
So with this same path String we will create a Folder or Directory:
Lets Do it here :
// Your code
String path = Environment.getExternalStorageDirectory()
.getAbsolutePath() + "/ordinazioni";
// After this
file=new File(path);
if(!file.isDirectory())
{
file.mkdirs();
}
Remember give Write Storage Permission if you are using Marsmallow then given Run time Permission also.
Now you issue is that you want to create it in Internal Storage so i want to say that this code made only for Internal storage for external you can do like this :
File newfile= new File("/sdcard/"+"ordinazioni");
But check your mobile have memory card or other External Drive.
I hope this will work for you