Solve- Change Virtual Machine ( Virtual Box ) Android Machine Full Screen Resolution Change

1- Open your Virtual Android Machine and select debug mode Option and enter.

 2- Wait until the process will complete then press enter.

 3- In command prompt Run this 3 commands step by step

• mkdir /boot                                           ( create Boot folder )
• mount /dev/sda1 /boot                          ( Mount your disk with boot folder )
• vi /boot/grub/menu.lst                           ( VI for edit your grub )

 4- Press "i" (for edit) and go to the first line begins with kernel /android, and add vga=ask after SRB=/android-... ( Look the image )  ↴

 

5- After edit press "ESC" (Exit editing) then press shift+zz (save and exit).
6- In the command prompt run this commands.

• umount /boot                             
• rmdir /boot                                 ( Remove your directory )
• reboot -f                                      ( Rebooting )

7- After Reboot close your machine for set your resolution in vga list.
8- Check your main machine resolution. In my case my machine resolution is 1366x768x32.Open Terminal (Linux) or Command prompt (Windows) and run this command.

•   VBoxManager setextradata "Android-9" "CustomVideoMode1" "1366x768x32"

( Replace Android-9 with your android machine name and replace resolution 1366x768x32 with your Main machine Resolution.)

9- Now start your Android machine.

 10- Press enter for selection your resolution list.

 11- Check your resolution in this list and type the number of your resolution and press enter.

 

After this booting process you will get your Full Screen Resolution Android Virtual Machine.