Android Go版本导入GMS服务指南

Google Confidential and Proprietary

Android Go Edition Device Configuration Guide

2018-02-24

Table of contents

Android Go Edition Device Configuration

Other configuration changes

Additional options

Important patches

Android Go Edition Kernel Configuration

Kernel config

Kernel patches

About Google Mobile Services Go Edition

Downloading GMS Go Edition

Integrating GMS Go Edition

Integrating Files Go Edition

Abstract

This document is intended to describe how to get started with the initial configuration of an Android Go Edition

device build target and how to integrate GMS Go Edition application package.

© 2017 Google, Inc. All Rights Reserved. No express or implied warranties are provided for herein. All specifications are subject to change

and any expected future products, features or functionality will be provided on an if and when available basis.

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Android Go Edition Device Configuration

The below sections describe mandatory and recommended device build target configuration

https://android-review.googlesource.com/#/c/platform/frameworks/base/+/533579/

https://android-review.git.corp.google.com/#/c/platform/frameworks/base/+/540362/

https://android-review.googlesource.com/#/c/platform/frameworks/base/+/553322/

https://android-review.googlesource.com/#/c/platform/frameworks/base/+/553321/

https://android-review.googlesource.com/#/c/platform/system/core/+/533578/ 

The product device makefile must include the go_defaults.mk for 1GB or go_defaults_512.mk for 512MB, to

include and setup all the default Android Go Edition build configuration flags.

go_defaults_common.mk

go_defaults_512.mk additions

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Google Confidential and Proprietary

go_defaults_common.mk

go_defaults_512.mk additions

Enable “Swap to zRAM”

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● Configure the zRAM size to 75% in the fstab file.

● Enable LZ4 compression for zRAM, also see kernel config section.

Example /device/<company>/<device>/fstab.enableswap

Example <product-device>.mk file

Example init.rc

To minimize the size of the system image it is strongly recommended to include Android Go Audio Package

Configure user data filesystem to F2FS

For increased performance it is required to enable F2FS on Android Go Edition devices. A few Android Platform

features, such as SQLite (WAL for example), have been tuned for better performance on F2FS compared to

EXT4. All supporting patches are in 3.18 and 4.4 common kernels.

● Enable F2FS in kernel config, see kernel config section below.

● Configure build system to generate the user data image as F2FS type.

● Update fstab to mount the /data partition using F2FS type.

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