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README.md
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README.md

UDOO Android manifest

This is a repo-gitorious fork of Android for the UDOO Quad board (www.udoo.org).
This is essentially a proper Android manifest, pointing to git subprojects, which allows to work on a fork of the reference UDOO Android image.
This fork is based on Android 4.3 Sources v2.0 (U-Boot, Kernel, File System).
The following branches are available:

  • udoo-android-4.3-v2.0: the original image (some irrelevant projects stripped, see notes below).
  • udoo-android-4.3-spdif: as above + changes for S/PDIF output.
  • udoo-android-4.3-v2.0-with-sata: as above + SATA suport (needs a partition on the HDD)
  • master: Bleeding edge / experimental.

If you are interested or just curious about how to create / maintain you own Android fork on GitHub take a look to this article here http://www.primianotucci.com/blog/fork-android-on-github

Building

General rules for building Android.

Prepare the system

sudo apt-get install git gnupg flex bison gperf build-essential zip curl \
  libc6-dev libncurses-dev x11proto-core-dev libreadline-dev g++-multilib \
  mingw32 tofrodos python-markdown libxml2-utils xsltproc zlib1g-dev \
  libc6-i386 lib32stdc++6 lib32gcc1 lib32ncurses5 lib32z1 ia32-libs \
  file psmisc uuid-dev liblzo2-dev

git config --global user.name "My Name"
git config --global user.email "my@email.com"  # These are required to repo sync

Install Oracle Java 6 SDK
Oracle's Java 6 SDK is required to build Android. You need this version (it doesn't have to be the default, though). Don't try to install other versions or use OpenJDK. It will just not work (at least, not for Android 4.3).

Download jdk-6u45-linux-x64.bin from the Oracle website

chmod +x jdk-6u45-linux-x64.bin
./jdk-6u45-linux-x64.bin
sudo chown root. -R jdk1.6.0_45
sudo mv jdk1.6.0_45 /usr/lib/jvm/java-6-sun
export JAVA_HOME=/usr/lib/jvm/java-6-sun
export ANDROID_JAVA_HOME=$JAVA_HOME

Download repo

curl https://storage.googleapis.com/git-repo-downloads/repo > /tmp/repo
sudo cp /tmp/repo /usr/local/bin/repo
sudo chmod 755 /usr/local/bin/repo

Sync the Android repo

mkdir udoo && cd udoo
repo init -u https://github.com/primiano/udoo_platform_manifest -b udoo-android-4.3-v2.0
repo sync -c -j4  # Can do -j20 if your internet connection is very fast (50+ MB/s)

Set up the build environment

export ARCH=arm
export CROSS_COMPILE=$PWD/prebuilts/gcc/linux-x86/arm/arm-eabi-4.6/bin/arm-eabi-
export PATH=$PWD/bootable/bootloader/uboot-imx/tools:$PATH
source build/envsetup.sh
lunch udoo-eng

Build

# Build the bootloader first
pushd .
cd bootable/bootloader/uboot-imx
popd
# Then the Android image
make -j8 droid    

Flash

# Find out the device for the sdcard with lsblk, e.g., /dev/sdc
sudo OUT=$OUT ./make_sd.sh /dev/sdc

SATA HDD partitions layout
The master branch is configured to mount /data from a SATA HDD rather than the sdcard. The expected partitions layout is defined in device/fsl/udoo/fstab.freescale as follows:

/dev/block/sda1  /data   ext4  # This partition should take all the HDD space

You can prepare your HDD, on a Linux machine, as follows:

sudo cfdisk /dev/sdX  # where sdX is the name of the device that you will attach to the board
# Create only one Linux partition which covers all the device
sudo mkfs.ext4 /dev/sdX1

Additional notes
In order to reduce sync time and size, the following subprojects have been stripped out w.r.t. the original image:

  • /cts
  • /device/asus
  • /device/generic/goldfish
  • /device/generic/mini-emulator-armv7-a-neon
  • /device/generic/mini-emulator-mips
  • /device/generic/mini-emulator-x86
  • /device/generic/mips
  • /device/generic/x86
  • /device/google
  • /device/lge
  • /device/sample
  • /device/samsung
  • /device/samsung_slsi
  • /device/ti
  • /docs
  • /external/eclipse-basebuilder
  • /external/eclipse-windowbuilder
  • /packages/apps/ES_File_Explorer (Redistribution grants are not clear to me for this app. No license is attached)

If you want to know more about how to maintain your custom Android fork, you can read more here:
www.primianotucci.com/blog/fork-android-on-github

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