android - Android 应用程序升级在技术上如何运作？

Question

有人可以解释或指出我可以阅读Android应用程序升级如何在操作系统细节级别上实际工作的资源吗？

score 13 · Accepted Answer

从包管理器日志中，似乎采取了以下步骤进行升级：

1）在临时位置下载包。

act=android.intent.action.PACKAGE_NEEDS_VERIFICATION dat=file:///data/app/vmdl1854135520.tmp typ=application/vnd.android.package-archive

2）做包装验证。

06-30 17:59:02.751 3701 3751 D PackageManager：[MSG] PACKAGE_VERIFIED：观察者{237546897}

3）重命名包。

06-30 17:59:03.361 3701 3751 D PackageManager：将 /data/app/vmdl1854135520.tmp 重命名为 /data/app/com.vzw.hss.myverizon-1

4）杀死现有的应用程序

06-30 17:59:03.361 3701 3751 D PackageManager: !@killApplicatoin: 10031, 替换 sys pkg

5) Dexopt apk

06-30 17:59:03.381 3701 3751 D PackageManager：在：/data/app/com.vzw.hss.myverizon-1/base.apk pkg=com.vzw.hss.myverizon isa=arm64 vmSafeMode=false 上运行 dexopt只解释=假

**06-30 17:59:02.741  3701  3751 D PackageManager: [VERIFY] Found 1 verifiers for intent Intent { act=android.intent.action.PACKAGE_NEEDS_VERIFICATION dat=file:///data/app/vmdl1854135520.tmp** typ=application/vnd.android.package-archive flg=0x10000001 } with 0 optional verifiers
06-30 17:59:02.741  3701  3751 D PackageManager: [VERIFY] sendOrderedBroadcastToRequiredVerifier:
06-30 17:59:02.741  3701  3751 D PackageManager: PackageVerificationState{
06-30 17:59:02.741  3701  3751 D PackageManager:     verifier packages=com.android.vending(10034),
06-30 17:59:02.741  3701  3751 D PackageManager:     intent=Intent { act=android.intent.action.PACKAGE_NEEDS_VERIFICATION dat=file:///data/app/vmdl1854135520.tmp typ=application/vnd.android.package-archive flg=0x10000001 (has extras) }
06-30 17:59:02.741  3701  3751 D PackageManager:     others=28, false, false, false, false, false
06-30 17:59:02.741  3701  3751 D PackageManager: }
06-30 17:59:02.741  3701  3751 D PackageManager: remove MCS_UNBIND message and Posting MCS_UNBIND 10 secs later
06-30 17:59:02.751  3701  3701 D PackageManager: [VERIFY] onReceive for RequiredVerifier id=28
06-30 17:59:02.751  3701  3701 D PackageManager: [VERIFY] send delayed message for CHECK_PENDING_VERIFICATION after : 10000
06-30 17:59:02.751  3701  4589 D PackageManager: [VERIFY] verifyPendingInstall(28, VERIFICATION_ALLOW), uid=10034
06-30 17:59:02.751  3701  3751 D PackageManager: [MSG] PACKAGE_VERIFIED: observer{237546897}
06-30 17:59:02.751  3701  3751 D PackageManager: [VERIFY] PACKAGE_VERIFIED: 
06-30 17:59:02.751  3701  3751 D PackageManager: PackageVerificationState{
06-30 17:59:02.751  3701  3751 D PackageManager:     verifier packages=com.android.vending(10034),
06-30 17:59:02.751  3701  3751 D PackageManager:     intent=Intent { act=android.intent.action.PACKAGE_NEEDS_VERIFICATION dat=file:///data/app/vmdl1854135520.tmp typ=application/vnd.android.package-archive flg=0x10000001 cmp=com.android.vending/com.google.android.vending.verifier.PackageVerificationReceiver (has extras) }
06-30 17:59:02.751  3701  3751 D PackageManager:     others=28, false, false, false, false, false
06-30 17:59:02.751  3701  3751 D PackageManager: }
06-30 17:59:02.751  3701  3751 D PackageManager: [VERIFY] broadcastPackageVerified(28, VERIFICATION_ALLOW, file:///data/app/vmdl1854135520.tmp)
06-30 17:59:02.761  3701  3751 D PackageManager: /data/app/vmdl1854135520.tmp already staged; skipping copy
06-30 17:59:02.761  3701  3751 D PackageManager: remove MCS_UNBIND and Posting MCS_UNBIND
06-30 17:59:02.761  3701  3751 D PackageManager: [MSG] PROCESS_PENDING_INSTALL: observer{237546897}
06-30 17:59:02.761  3701  3751 D PackageManager: currentStatus{1}
06-30 17:59:02.761  3701  3751 D PackageManager: installPackageLI: path
06-30 17:59:03.321  3701  3751 W PackageManager: verifying app can be installed or not
**06-30 17:59:03.361  3701  3751 D PackageManager: Renaming /data/app/vmdl1854135520.tmp to /data/app/com.vzw.hss.myverizon-1**
**06-30 17:59:03.361  3701  3751 D PackageManager: replacePackageLI**
**06-30 17:59:03.361  3701  3751 D PackageManager: !@killApplicatoin: 10031, replace sys pkg**
06-30 17:59:03.371  3701  3751 W PackageManager: Trying to update system app code path from /system/priv-app/MyVerizon to /data/app/com.vzw.hss.myverizon-1
06-30 17:59:03.371  3701  3751 I PackageManager: scanFileNewer : com.vzw.hss.myverizon
**06-30 17:59:03.381  3701  3751 D PackageManager: Running dexopt on: /data/app/com.vzw.hss.myverizon-1/base.apk pkg=com.vzw.hss.myverizon isa=arm64 vmSafeMode=false interpret_only=false**
06-30 17:59:06.861  3701  3751 I PackageManager: do mInstaller.dexopt : 0
06-30 17:59:06.861  3701  3751 D PackageManager: Time to dexopt: 3.482 seconds
06-30 17:59:06.861  3701  3751 D PackageManager: !@killApplicatoin: 10031, update pkg
06-30 17:59:06.861  3701  3751 W PackageManager: Code path for pkg : com.vzw.hss.myverizon changing from /system/priv-app/MyVerizon to /data/app/com.vzw.hss.myverizon-1
06-30 17:59:06.861  3701  3751 W PackageManager: Resource path for pkg : com.vzw.hss.myverizon changing from /system/priv-app/MyVerizon to /data/app/com.vzw.hss.myverizon-1
06-30 17:59:06.961  3701  3751 D PackageManager: New package installed
06-30 17:59:06.971  3701  3751 I PackageManager: Un-granting permission android.permission.sec.ENTERPRISE_DEVICE_ADMIN from package com.samsung.mdmtest1 (protectionLevel=2 flags=0x89be44)
06-30 17:59:06.971  3701  3751 I PackageManager: Un-granting permission com.sec.enterprise.knox.permission.KNOX_ENTERPRISE_BILLING from package com.samsung.mdmtest1 (protectionLevel=2 flags=0x89be44)
06-30 17:59:07.141  3701  3751 D PackageManager: doPostInstall for uid{10031}
06-30 17:59:07.151  3701  3751 D PackageManager: [MSG] MCS_UNBIND
06-30 17:59:07.151  3701  3751 D PackageManager: [MSG] POST_INSTALL: observer{237546897}
06-30 17:59:07.151  3701  3751 D PackageManager:           Handling post-install for 29
06-30 17:59:07.661  3701  3751 D PackageManager: result of install: 1{237546897}

score 6 · Accepted Answer

我找不到好的资源，但这是我对这个过程的理解。

APK 在安装时会存储在手机上的私有目录中。发生升级时，会从商店下载新的 APK，然后用新的 APK 替换旧的 APK。解析和安装新的 AndroidManifest，就好像它是新安装一样，并检查版本、签名密钥等以确保允许升级。实际的应用程序数据存储在单独的位置，并且在升级过程中不会被触及。如果您更改数据库架构或其他内容，则需要在首次启动时迁移数据。