Android : data from local machine to Android app

I'm using an accounting software that stores the entire data in my local machine. Now I want to build an android application through which I can access that particular data from my local machine. To accomplish this, I found that I can connect both machine and mobile to the same network and then access the data using FTP technique. But this will be a problem because I have a dynamic ip which will change every time the machine reboots and I will need to key in the ip to configure the connection. And it also leads to disconnection many a times. So is there any other solution to the problem? Or a better way to implement the same?

Please help. Thanks in advance.