Using Android as RPi display

rpi_android_display.sh

# =============================================================================
# ANDROID AS DISPLAY SCREEN FOR RASPBERRY PI
# =============================================================================
# Sets VNC so you can use your Android phone as display for Raspberry Pi. If
# you plug it via USB and use USB Tethering and install the required things
# (following steps in this file) it should work.
#
# Following this resources:
# https://www.raspberrypi.org/forums/viewtopic.php?f=41&t=127971
# http://rageweb.info/2013/11/07/bootconfig-txt-in-kali/
#
# WARNING: I would not run directly this script, it's better to 
# copy, paste and run the lines progressively to avoid big mess.

echo "Modifying network interfaces file"
interfacesfile=/etc/network/interfaces
sudo echo ""  >> $interfacesfile
sudo echo "allow-hotplug usb0" >> $interfacesfile
sudo echo "auto usb" >> $interfacesfile
sudo echo "iface usb0 inet static" >> $interfacesfile
sudo echo "address 192.168.42.42" >> $interfacesfile
sudo echo "netmask 255.255.255.0" >> $interfacesfile
sudo echo "network 192.168.42.0" >> $interfacesfile
sudo echo "broadcast 192.168.42.255" >> $interfacesfile

echo "Installing x11vnc"
sudo apt-get install x11vnc

echo "Setting password for x11vnc, you will have to input it"
x11vnc -storepasswd

echo "Creating folders ~/.config/autostart"
mkdir -p ~/.config/autostart
cd ~/.config/autostart

echo "Creating x11vnc.desktop"
touch x11vnc.desktop
echo "[Desktop Entry]" >> x11vnc.desktop
echo "Encoding=UTF-8" >> x11vnc.desktop
echo "Type=Application" >> x11vnc.desktop
echo "Name=X11VNC" >> x11vnc.desktop
echo "Comment=" >> x11vnc.desktop
echo "Exec=x11vnc -forever -usepw -display :0 -ultrafilexfer" >> x11vnc.desktop
echo "StartupNotify=false" >> x11vnc.desktop
echo "Terminal=false" >> x11vnc.desktop
echo "Hidden=false" >> x11vnc.desktop

# In case of Raspbian Jessie with Pixel
sudo sed 's/#framebuffer_width=.*/framebuffer_width=1280/' /boot/config.txt
sudo sed 's/#framebuffer_height=.*/framebuffer_height=720/' /boot/config.txt
sudo sed 's/#hdmi_set_hotplug=.*/hdmi_set_hotplug=1/' /boot/config.txt
sudo sed 's/#hdmi_group=.*/hdmi_group=2/' /boot/config.txt
sudo sed 's/#hdmi_mode=.*/hdmi_mode=16/' /boot/config.txt

# In case of Kali, the config.txt file is different. You
# need to mount the bios partition first and create the config
# file there first.
mkdir /fat32
mount /dev/mmcblk0p1 /fat32/
cd /fat32
touch config.txt
echo "framebuffer_width=1280" >> config.txt
echo "framebuffer_height=720" >> config.txt
echo "hdmi_group=2" >> config.txt
echo "hdmi_mode=16" >> config.txt
umount /fat32

echo "All ready!"