[QUESTION]
如何配置并查看android系统环境变量？原文：www.icfans.com
[ANSWER]
1、配置全局系统环境变量方法
路径：system/core/rootdir/init.environ.rc.in
内容如下
1 # set up the global environment
2 on init
3 export PATH /sbin:/vendor/bin:/system/sbin:/system/bin:/system/xbin
4 export ANDROID_BOOTLOGO 1
5 export ANDROID_ROOT /system
6 export ANDROID_ASSETS /system/app
7 export ANDROID_DATA /data
8 export ANDROID_STORAGE /storage
9 export ASEC_MOUNTPOINT /mnt/asec
10 export LOOP_MOUNTPOINT /mnt/obb
11 export BOOTCLASSPATH %BOOTCLASSPATH%
12 export SYSTEMSERVERCLASSPATH %SYSTEMSERVERCLASSPATH%
2、配置临时系统环境变量
adb shell进入命令行
设置
$export ANDROID_BOOTLOGO =1
查看
$echo $ANDROID_BOOTLOGO
1 3
、通过adb shell set可以查看android系统当前全部的环境变量
例：
D:\testC>adb shell set
ANDROID_ASSETS=/system/app
ANDROID_BOOTLOGO=1
ANDROID_DATA=/data
ANDROID_PROPERTY_WORKSPACE=9,0
ANDROID_ROOT=/system
ANDROID_SOCKET_adbd=10
ANDROID_STORAGE=/storage
ASEC_MOUNTPOINT=/mnt/asec
BASHPID=14728
BOOTCLASSPATH=/system/framework/core-libart.jar:/system/framework/conscrypt.jar:/system/framework/okhttp.jar:/system/fra
mework/core-junit.jar:/system/framework/bouncycastle.jar:/system/framework/ext.jar:/system/framework/framework.jar:/syst
em/framework/telephony-common.jar:/system/framework/voip-common.jar:/system/framework/ims-common.jar:/system/framework/m
ms-common.jar:/system/framework/android.policy.jar:/system/framework/apache-xml.jar:/system/framework/telephony-common2.
jar
COLUMNS
EMULATED_STORAGE_SOURCE=/mnt/shell/emulated
EMULATED_STORAGE_TARGET=/storage/emulated
EPOCHREALTIME=1454469703.316158
EXTERNAL_STORAGE=/storage/sdcard0
HOME
IFS=$' \t\n'
INTERNAL_STORAGE_TYPE=emulated
KSHEGID=2000
KSHGID=2000
KSHUID=2000
KSH_VERSION='@(#)MIRBSD KSH R50 2014/10/07'
LEGACY_STORAGE=/storage/emulated/legacy
LINES
LOOP_MOUNTPOINT=/mnt/obb
OPTIND=1
PATH=/sbin:/vendor/bin:/system/sbin:/system/bin:/system/xbin
PGRP=14728
PIPESTATUS=0
PPID=237
PRIMARY_STORAGE_TYPE=external
PS1='$ '
PS2='> '
PS3='#? '
PS4='+ '
PWD=/
RANDOM=1577
SECONDARY_STORAGE=/storage/emulated/legacy
SECONDS=0
SHELL
SYSTEMSERVERCLASSPATH=/system/framework/services.jar:/system/framework/ethernet-service.jar:/system/framework/wifi-servi
ce.jar
TMOUT=0
USER_ID=2000