1. Raspberry pi should be up and running
2. Connect LAN Cable to the router
3. Set up a static IP address to the Pi.
https://www.modmypi.com/blog/tutorial-how-to-give-your-raspberry-pi-a-static-ip-address
4. Install Putty software in your laptop. For Ubuntu linux machines use Synaptic Package manager for download and install Puttysoftware.
Android - connection with Raspberry Pi
1.Install VNCSERVER on your Pi
sudo apt-get update
sudo apt-get install tightvncserver
2. Install
androidvnc in your android phonehttp://raspi.tv/2012/install-and-use-tightvnc-remote-desktop-on-raspberry-pi-through-windows-android-or-ios
3. In Raspberry Pi board run vncserver command
4. Configure AndroidVNC in phone with following and connect
NickName:Pi
address: static ip address of Raspberry Pi
Port: 5901