Android/Building

How to build an Android image for XO-4.

We provide in this directory changes to the Android 4.3.1 source so that Android can be built for the XO-4 laptop, and then merged with an OLPC OS build to create a dual-boot image.

Ingredients

• a well connected development system,
• about 20 GB of download capability,

Method

• follow the "Downloading the Source" guide to install Repo,
• use Repo to download the Android source from OLPC repositories,

$ repo init -u git://dev.laptop.org/users/ben/android_manifest -b android-4.3.1-xo4
$ repo sync

• go to #Source code see what patches are applied to which repository and check source code before start the build.
• ensure you installed all the tools needed to build Android Initializing a Build Environment
• start the build:

$ . build/envsetup.sh
$ lunch 14
$ make -j8

• ensure you have simg2img tools in your /usr/bin/ simg2img
• start to create zd file:

Android only image

$ cd vendor/olpc/xo4/mkzd
$ ./mkzd.sh

Combine Android with Sugar

• ensure you have a copy of the OLPC OS Linux, Sugar and Gnome build file, e.g. 32013o4.zd,

$ cd vendor/olpc/xo4/sugar-combiner
$ ./mkzd.sh

Alternative Method

To merge an already published Android build with an already published OLPC OS derived build:

• download the system.img, ramdisk.img, and kernel files from the Android build directory,
• download the build derived from OLPC OS, e.g. 32013xx4.zd or 4_0b125.zd,
• download the mkzd.sh tool, and edit it to match file names,
• run mkzd.sh

Source code

source code for building Android is a combination of 4 parts.

• OLPC Android kernel for XO4 Android/Kernel

• You can also download kernel image form device/olpc/xo4-kernel git repository if you don't want to change kernel

• source code from google AOSP project branch "android-4.3.1_r1". "Downloading the Source" guide
• OLPC patches for AOSP project.

frameworks/av	git repository
frameworks/base	git repository
frameworks/native	git repository
system/core	git repository
hardware/libhardware	git repository
hardware/libhardware_legacy	git repository
hardware/marvell	git repository
build	git repository
bionic	git repository
external/bluetooth/bluedroid	git repository
external/kernel-headers	git repository
external/webkit	git repository
packages/apps/Calendar	git repository
packages/apps/Gallery2	git repository
packages/apps/Launcher2	git repository
packages/providers/CalendarProvider	git repository

• source code from vendor, Marvell and OLPC

vendor/marvell/generic	git repository (not available)
vendor/marvell/external	git repository (not available)
vendor/olpc/xo4	git repository
device/olpc/xo4	git repository
device/olpc/xo4-kernel	git repository

See Also

• mkzd
• Android
• Android/Kernel