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,

$ repo init -u https://android.googlesource.com/platform/manifest -b android-4.3.1_r1
$ repo sync

• in the same working directory, expand our file xo4-android-source-release-20131220.tar.gz and merge the changes,
• start the build:

$ . build/envsetup.sh
$ lunch 13
$ make -j8

• ensure you have a copy of the OLPC OS Linux, Sugar and Gnome build file, e.g. 32013o4.zd,
• edit mkzd.sh to match file names,
• prepare a .zd file for the XO-4:

$ cd vendor/olpc/xo4/mkzd
$ ./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
• source code from google AOSP project branch "android-4.3.1_r1". "Downloading the Source" guide
• OLPC patches for AOSP project.

frameworks/base	git repository
frameworks/av	git repository

• source code from vendor Marvell/OLPC

See Also

• mkzd
• Android
• Android/Kernel