应用和服务裁剪--系统优化

1.系统中所有的应用和服务

# pm list packages
package:com.android.cts.priv.ctsshim   # tailor
package:com.qualcomm.qti.qms.service.telemetry
package:com.iflytek.autofly.accountcenter
package:com.iflytek.autofly.systemserver
package:com.android.car.messenger
package:com.android.internal.display.cutout.emulation.corner
package:com.gxatek.multiinstanceservice
package:com.qualcomm.qti.improvetouch.service
package:com.android.internal.display.cutout.emulation.double
package:com.android.providers.telephony
package:com.android.providers.calendar # 日历程序支持服务
package:com.iflytek.autofly.naviselect
package:com.gxatek.cockpit.diagnostic
package:com.android.providers.media
package:com.qti.service.colorservice
package:com.android.wallpapercropper # tailor
package:com.android.car.media
package:com.quicinc.cne.CNEService
package:com.android.car.radio
package:com.android.car.trust
package:com.core.system.service
package:com.gxa.car.timesync
package:com.android.protips  # tailor
package:com.gxatek.cockpit.atmospherelampservice
package:com.qiyi.video.pad
package:com.android.documentsui # tailor
package:com.android.externalstorage
package:com.qualcomm.uimremoteclient
package:com.android.htmlviewer # tailor
package:com.gxatek.cockpit.launcher
package:com.android.companiondevicemanager
package:com.android.quicksearchbox # tailor
package:com.android.mms.service  # tailor
package:com.gxa.car.externalkey
package:com.gxa.service.account
package:com.qualcomm.qti.qms.service.connectionsecurity
package:com.android.providers.downloads  # tailor
package:com.gxatek.cockpit.vicelauncher
package:com.desay_svautomotive.svcarinfo
package:com.gxa.car.qnxapp
package:com.gxatek.cockpit.gallery
package:com.android.soundrecorder  # tailor
package:android.car.cluster.loggingrenderer
package:com.gxa.service.carusbupdate
package:com.qualcomm.uimremoteserver
package:com.android.defcontainer  # 应用安装相关的应用，删除可能无法启动
package:com.qti.confuridialer
package:com.desay_svautomotive.service.projectionservice
package:com.android.car.mapsplaceholder
package:com.android.providers.downloads.ui # tailor
package:com.android.pacprocessor
package:com.android.simappdialog   # tailor 插入sim卡的弹窗
package:com.iflytek.cutefly.speechclient.hmi
package:com.android.internal.display.cutout.emulation.tall
package:com.android.certinstaller  # tailor 证书安装
package:com.android.carrierconfig # tailor 可用网络的默认配置
package:android
package:com.android.contacts
package:com.android.camera2
package:com.qualcomm.wfd.service
package:com.gxatek.cockpit.schedule
package:com.android.car.systemupdater
package:com.gxa.car.engineMode
package:com.gxatek.cockpit.msgcenter
package:com.android.car
package:com.android.egg  # tailor 彩蛋
package:com.android.mtp  # ? usb传输协议相关的
package:com.android.nfc  # tailor 
package:com.android.stk
package:com.android.backupconfirm
package:com.gxatek.appservice.cluster
package:com.gxa.service.devicemanager
package:com.android.provision #系统初始化引导程序，写入一个DEVICE_PROVISIONED标记
package:com.android.statementservice
package:com.android.settings.intelligence
package:com.android.calendar # tailor日历
package:com.android.systemui.theme.dark
package:com.gxatek.cockpit.carlife
package:com.gxatek.cockpit.carplay
package:com.gxa.car.ncm.overlay
package:com.iflytek.auto.mall.hmi
package:com.android.car.settings
package:com.iflytek.autofly.h5
package:com.qualcomm.qti.dynamicddsservice
package:com.gxa.service.ebcall
package:com.android.car.hvac
package:com.qualcomm.qcrilmsgtunnel
package:com.android.providers.settings
package:com.android.sharedstoragebackup
package:com.gxatek.cockpit.carsettings
package:com.android.printspooler
package:com.qualcomm.qti.improvetouch
package:com.android.dreams.basic
package:com.gxatek.cockpit.applet
package:com.android.webview
package:com.gxatek.cockpit.btcall
package:com.android.se
package:com.android.inputdevices
package:com.android.support.car.lenspicker
package:com.gxa.service.ota
package:com.android.bips
package:com.iflytek.autofly.mediax
package:com.qti.dpmserviceapp
package:com.google.android.car.defaultstoragemonitoringcompanionapp
package:com.android.musicfx  # 原生音效
package:com.gxatek.cockpit.scenesengine
package:com.gxa.car.ncm
package:com.android.cellbroadcastreceiver   # 小区广播
package:android.ext.shared
package:com.android.onetimeinitializer # 首次启动用于装谷歌app的
package:com.android.server.telecom
package:com.android.keychain
package:com.qti.snapdragon.qdcm_ff
package:com.ts.appservice.kanzikotanimationservice
package:com.gxatek.cockpit.weather
package:com.gxa.service.messagecenter
package:com.android.printservice.recommendation
package:com.android.dialer # 原生拨号盘
package:com.android.gallery3d # 相机相框
package:android.ext.services
package:com.desay_svautomotive.multiscreen
package:com.android.calllogbackup #手机通话记录备份工具
package:com.gxatek.cockpit.testcarlife
package:com.gxatek.cockpit.testcarplay
package:com.android.packageinstaller
package:com.android.carrierdefaultapp # 运营商默认流量服务
package:com.gac.cloud.app
package:com.android.car.media.localmediaplayer
package:com.android.proxyhandler  # 自动配置代理
package:com.gxa.car.procmanagement
package:com.android.inputmethod.latin  # 原生输入法
package:com.gxa.appservice.caradapter
package:org.chromium.webview_shell
package:android.car.usb.handler
package:com.gxa.service.cluster
package:com.gxa.service.settings
package:com.android.managedprovisioning #工作组资料设置  ?
package:com.gxa.service.mediacenterservice
package:com.android.dreams.phototable  # PhotoTable屏保
package:com.gxa.cockpit.hvac
package:cn.gaei.appstore
package:com.desaysv.otaservice
package:com.gxa.firewall
package:com.gxatek.cockpit.voicecarctrl
package:com.android.smspush  # 短信推送
package:com.android.wallpaper.livepicker  # 动态墙纸选择器
package:com.gxa.service.weather
package:com.google.android.car.vms.subscriber
package:com.qti.snapdragon.qdcm_mobile
package:com.gxa.appservice.platformadapter.adaptermainservice
package:com.gxa.service.systemui
package:com.android.storagemanager
package:com.android.bookmarkprovider # 书签
package:com.gxatek.cockpit.miniprogram
package:com.android.settings
package:com.qualcomm.qti.sva
package:com.gxatek.cockpit.carservice
package:com.gxatek.cockpit.avdc
package:com.android.calculator2 # 计算器
package:com.gxa.service.bluetooth
package:com.gxatek.cockpit.settings
package:com.android.cts.ctsshim # cts
package:com.gxa.car.audio
package:com.gxa.car.power
package:com.gxa.car.scene
package:com.iflytek.inputmethod
package:com.qti.diagservices
package:com.iflytek.autofly.dms
package:com.android.vpndialogs # VPN
package:com.iflytek.autofly.platformservice
package:com.android.email   # 原生email
package:com.android.music   # 原生music
package:com.android.phone   # 原生phone
package:com.android.shell  # ?
package:com.android.wallpaperbackup # 墙纸备份
package:com.android.providers.blockednumber
package:com.android.providers.userdictionary  # 用户词典Content Provider
package:com.android.emergency  # 急救信息
package:com.gxa.car.wifi.service
package:com.android.location.fused
package:com.android.deskclock  # 自带闹钟
package:com.android.systemui
package:com.android.bluetoothmidiservice
package:com.qualcomm.qti.poweroffalarm
package:com.gxatek.cockpit.vpamultimode
package:com.gxa.permission
package:com.guangqi.chezaiapp
package:com.gxa.car.hardkey
package:com.android.traceur
package:com.gxatek.cockpit.screensaver
package:com.qualcomm.qti.qms.service.trustzoneaccess
package:com.desaysv.ftpserver
package:com.android.bluetooth
package:com.qualcomm.timeservice
package:com.android.providers.contacts
package:com.gxatek.cockpit.dvr
package:com.android.captiveportallogin # 网络连通信测试
package:com.google.android.car.vms.publisher
package:com.gxatek.cockpit.globalsearch
package:org.codeaurora.qti.nrNetworkSettingApp
package:com.gxatek.cockpit.account

一共有201个应用。

2.可裁剪应用

根据包名搜索应用依赖，没有依赖的可以支持裁掉编译版本试试功能。

# 使用来删减不需要编入到系统的模块
PRODUCT_DELETE_PACKAGES += \
	modulename
	
PRODUCT_DELETE_PACKAGES += \
     Email \
     Music \
     TeleService \
     CtsShimPrivPrebuilt \
     WallpaperCropper \
     DocumentsUI \
     HTMLViewer \
     Protips \
     QuickSearchBox \
     DownloadProvider \
     SoundRecorder \
     DownloadProviderUi \
     SimAppDialog \
     CertInstaller \
     CarrierConfig \
     EasterEgg \
     NfcNci \
     Calendar \
     MusicFX \
     CellBroadcastReceiver \
     OneTimeInitializer \
     Dialer \
     Gallery2 \
     CarrierDefaultApp \
     ProxyHandler \
     ManagedProvisioning \
     CarLatinIME \
     WAPPushManager \
     LiveWallpapersPicker \
     BookmarkProvider \
     ExactCalculator \
     CtsShimPrebuilt \
     VpnDialogs \
     WallpaperBackup \
     UserDictionaryProvider \
     EmergencyInfo \
     DeskClock \
     CaptivePortalLogin \
     CalendarProvider

# 或者使用如下Android.mk来裁剪模块
LOCAL_PATH:= $(call my-dir)
include $(CLEAR_VARS)

LOCAL_MODULE := CarExcludePackages

LOCAL_MODULE_TAGS := optional
LOCAL_MODULE_CLASS := FAKE
LOCAL_MODULE_SUFFIX := $(COMMON_ANDROID_PACKAGE_SUFFIX)

LOCAL_OVERRIDES_PACKAGES += \
    Launcher2 \
    Launcher3 \
    CarLauncher

include $(BUILD_SYSTEM)/base_rules.mk

$(LOCAL_BUILT_MODULE):
	$(hide) echo "Fake: $@"
	$(hide) mkdir -p $(dir $@)
	$(hide) touch $@

PACKAGES.$(LOCAL_MODULE).OVERRIDES := $(strip $(LOCAL_OVERRIDES_PACKAGES))

首先通过pm path 包名找到对应编译时的LOCAL_MODULE 或者 LOCAL_PACKAGE_NAME, 然后通过包的名字或者模块名字找到对应的mk, 把模块名字加到PRODUCT_DELETE_PACKAGES下。

# packages/apps/Email/Android.mk
com.android.email   # 原生email

# packages/apps/Music/Android.mk
com.android.music   # 原生music

# packages/services/Telephony/Android.mk
com.android.phone   # 原生phone

# frameworks/base/packages/CtsShim/Android.mk
com.android.cts.priv.ctsshim # 原生cts app

# frameworks/base/packages/WallpaperCropper/Android.mk
com.android.wallpapercropper # 壁纸

# packages/apps/Protips/Android.mk
com.android.protips # 提示小绿人

# packages/apps/DocumentsUI/Android.mk
com.android.documentsui # 处理文档权限的组件控制对特定文件的访问

# packages/apps/HTMLViewer/Android.mk
com.android.htmlviewer # HTML查看器

# packages/apps/QuickSearchBox/Android.mk
# device/qcom/common/base.mk 配置加入
# device/qcom/qssi/base.mk 配置加入
# build/make/target/product/core.mk 配置加入
com.android.quicksearchbox  # 原生全局搜索

# packages/services/Mms/Android.mk
com.android.mms.service  # 短信服务

# packages/providers/DownloadProvider/Android.mk
com.android.providers.downloads  # 浏览器点链接下载服务

# packages/apps/SoundRecorder/Android.mk
com.android.soundrecorder  # 原生录音机

# packages/providers/DownloadProvider/ui/Android.mk
com.android.providers.downloads.ui 

# frameworks/base/packages/SimAppDialog/Android.mk
com.android.simappdialog # sim插入弹窗
# ===========   正常  ==================

# packages/apps/CertInstaller/Android.mk
com.android.certinstaller # 证书安装服务

# packages/apps/CarrierConfig/Android.mk
com.android.carrierconfig  # 可用网络的默认配置

# frameworks/base/packages/services/Proxy/Android.mk
com.android.proxyhandler  # 自动配置代理

# build/make/target/product/generic_no_telephony.mk
# build/make/target/product/sdk_base.mk
com.android.egg # 彩蛋

# packages/apps/Nfc/Android.mk
com.android.nfc  # nfc服务

# packages/apps/Calendar/Android.mk
com.android.calendar  # 日历

# packages/apps/MusicFX/Android.mk
com.android.musicfx  # 音效

# packages/apps/CellBroadcastReceiver/Android.mk
com.android.cellbroadcastreceiver # 小区广播

# packages/apps/OneTimeInitializer/Android.mk
com.android.onetimeinitializer # 首次启动用于装谷歌app的

# packages/apps/Dialer/Android.mk
com.android.dialer # 原生拨号盘

# packages/apps/Gallery2/Android.mk
com.android.gallery3d # 相机相框

# frameworks/base/packages/CarrierDefaultApp/Android.mk
com.android.carrierdefaultapp # 运营商默认流量服务

# packages/apps/Car/LatinIME/Android.mk
com.android.inputmethod.latin  # 原生输入法

# packages/apps/ManagedProvisioning/Android.mk
com.android.managedprovisioning # 工作组资料设置

# packages/screensavers/PhotoTable/Android.mk
com.android.dreams.phototable  # PhotoTable屏保

# frameworks/base/packages/WAPPushManager/Android.mk
com.android.smspush  # 短信推送

# packages/wallpapers/LivePicker/Android.mk
com.android.wallpaper.livepicker  # 动态墙纸选择器

# packages/providers/BookmarkProvider/Android.mk
com.android.bookmarkprovider # 书签

# packages/apps/ExactCalculator/Android.mk
com.android.calculator2 # 计算器

# frameworks/base/packages/CtsShim/Android.mk
com.android.cts.ctsshim # cts

# frameworks/base/packages/VpnDialogs/Android.mk
com.android.vpndialogs # VPN

# frameworks/base/packages/WallpaperBackup/Android.mk
com.android.wallpaperbackup # 墙纸备份

# packages/providers/UserDictionaryProvider/Android.mk
com.android.providers.userdictionary  # 用户词典Content Provider

# packages/apps/EmergencyInfo/Android.mk
com.android.emergency  # 急救信息

# packages/apps/DeskClock/Android.mk
com.android.deskclock  # 自带闹钟

# frameworks/base/packages/CaptivePortalLogin/Android.mk
com.android.captiveportallogin # 网络连通信测试

# packages/providers/CalendarProvider/Android.mk
com.android.providers.calendar # 日历程序支持服务

3.修改编译脚本

# build/core/main.mk
# Filter out the overridden packages before doing expansion
product_MODULES := $(filter-out $(foreach p, $(product_MODULES), \
$(PACKAGES.$(p).OVERRIDES)), $(product_MODULES))
# Filter out executables as well
product_MODULES := $(filter-out $(foreach m, $(product_MODULES), \
$(EXECUTABLES.$(m).OVERRIDES)), $(product_MODULES))

# Filter out PRODUCT_DELETE_PACKAGES标签的模块
product_MODULES := $(filter-out $(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_DELETE_PACKAGES), $(product_MODULES))

INTERNAL_PRODUCT值是: device/qcom/msmnile_gvmq/msmnile_gvmq.mk

# build/core/product.mk
_product_var_list := \
    PRODUCT_NAME \
    PRODUCT_MODEL \
    PRODUCT_LOCALES \
    PRODUCT_AAPT_CONFIG \
    PRODUCT_AAPT_PREF_CONFIG \
    PRODUCT_AAPT_PREBUILT_DPI \
    PRODUCT_PACKAGES \
    # 添加PRODUCT_DELETE_PACKAGES标签
    PRODUCT_DELETE_PACKAGES \
    PRODUCT_PACKAGES_DEBUG \
    PRODUCT_PACKAGES_ENG \
    PRODUCT_PACKAGES_TESTS \
    PRODUCT_DEVICE \
    PRODUCT_MANUFACTURER 

# device/qcom/common/base.mk

PRODUCT_PACKAGES += liboemaids_system
PRODUCT_PACKAGES += liboemaids_vendor
PRODUCT_PACKAGES += android.hardware.health@2.0-service

# 加入
include device/qcom/common/tailor.mk

# device/gxatek/common/tailor.mk
PRODUCT_DELETE_PACKAGES += \
     Email \
     Music \
     TeleService \
     CtsShimPrivPrebuilt \
     WallpaperCropper \
     DocumentsUI \
     HTMLViewer \
     Protips \
     QuickSearchBox \
     DownloadProvider \
     SoundRecorder \
     DownloadProviderUi \
     SimAppDialog \
     CertInstaller \
     CarrierConfig \
     EasterEgg \
     NfcNci \
     Calendar \
     MusicFX \
     CellBroadcastReceiver \
     OneTimeInitializer \
     Dialer \
     Gallery2 \
     CarrierDefaultApp \
     ProxyHandler \
     ManagedProvisioning \
     CarLatinIME \
     WAPPushManager \
     LiveWallpapersPicker \
     BookmarkProvider \
     ExactCalculator \
     CtsShimPrebuilt \
     VpnDialogs \
     WallpaperBackup \
     UserDictionaryProvider \
     EmergencyInfo \
     DeskClock \
     CaptivePortalLogin \
     CalendarProvider

4.优化后结果

优化前启动日志

15506 2021/09/02 20:06:50.728475 15.0165 191 ECU1 am_a LOGD 335 log info verbose 1 I/am_activity_launch_time( 732): [0,41558120,com.android.settings/.FallbackHome,902,902]
21304 2021/09/08 21:26:15.593283 335844.3927 221 ECU1 am_a LOGD 335 log info verbose 1 I/am_activity_launch_time( 732): [0,41558120,com.android.settings/.FallbackHome,902,902]
45648 2021/09/08 21:26:29.368316 27.0577 245 ECU1 am_a LOGD 335 log info verbose 1 I/am_activity_launch_time( 732): [0,109419867,com.gxatek.cockpit.launcher/.LauncherActivity,5839,5839]
46331 2021/09/08 21:26:29.804092 28.0021 160 ECU1 am_a LOGD 335 log info verbose 1 I/am_activity_launch_time( 732): [0,143134280,com.gxatek.cockpit.vicelauncher/.MainActivity,1057,1057]

从日志中看到优化前Android启动耗时在28s。

裁剪一半应用

14153 2021/09/02 20:06:50.030267 14.0892 118 ECU1 am_a LOGD 337 log info verbose 1 I/am_activity_launch_time( 739): [0,250243696,com.android.settings/.FallbackHome,933,933]
43483 2021/09/02 20:07:02.283826 27.0223 16 ECU1 am_a LOGD 337 log info verbose 1 I/am_activity_launch_time( 739): [0,141995565,com.gxatek.cockpit.launcher/.LauncherActivity,6054,6054]
44365 2021/09/02 20:07:02.607031 27.0555 130 ECU1 am_a LOGD 337 log info verbose 1 I/am_activity_launch_time( 739): [0,170842785,com.gxatek.cockpit.vicelauncher/.MainActivity,858,858]

从日志中看到优化前Android启动耗时在27s。

裁剪应用之后

14475 2021/09/02 20:06:50.375211 13.0238 184 ECU1 am_a LOGD 338 log info verbose 1 I/am_activity_launch_time( 732): [0,54614525,com.android.settings/.FallbackHome,793,793]
19098 2021/09/08 21:52:48.474646 334249.4242 105 ECU1 am_a LOGD 338 log info verbose 1 I/am_activity_launch_time( 732): [0,54614525,com.android.settings/.FallbackHome,793,793]
39476 2021/09/08 21:53:01.071597 25.0651 3 ECU1 am_a LOGD 338 log info verbose 1 I/am_activity_launch_time( 732): [0,64801107,com.gxatek.cockpit.launcher/.LauncherActivity,6039,6039]
39755 2021/09/08 21:53:01.297294 25.0881 26 ECU1 am_a LOGD 338 log info verbose 1 I/am_activity_launch_time( 732): [0,178297624,com.gxatek.cockpit.vicelauncher/.MainActivity,830,830]

从日志中看到优化前Android启动耗时在25s。

总结：根据项目的需求，当车机系统裁掉以上应用后，开机启动耗时可以减少近3s。