Use Jcifs In Android

When I use these code in PC,it runs fine. SmbFile root=null; root=new SmbFile('smb://10.20.137.155'); But the same code in android , it throws exception,why? Can anyone help me?

Solution 1:

I am answer my question on my own. It get exception becasue I haven't got the permisson to access Internet. After I add it runs well.