Android lollipop on Pi 2

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# Prepare sd card
 Partitions of the card should be set-up like followings.
  p1 512MB for BOOT : Do fdisk, format as fat32
  p2 512MB for /system : Do fdisk, new primary partition, size 512M.
  p3 512MB for /cache  : Do fdisk, format as ext4
  p4 remainings for /data : Do fdisk, format as ext4

# Write system partition
  $ cd out/target/product/rpi2
  $ sudo dd if=system.img of=/dev/<p2> bs=1M
  
# Boot partition, kernel & ramdisk
  device/brcm/rpi2/boot/* to p1:/
  kernel/rpi/arch/arm/boot/zImage to p1:/
  out/target/product/rpi2/ramdisk.img to p1:/