關于android8.1實現多個app升級時的注意事項

關于android8.1實現多個app升級時的注意事項

android新的版本，packagemanager對app安裝有一定的限制，就是除了shell和root用戶外，其他用戶的進程不允許安裝除了系統用戶（system ui）以外的app。也就是例如system用戶不允許安裝uid為7000的app。

所以，如果你想通過一個appupgrade（一個system用戶的進程）專門去進行多個不用用戶的應用進行差分升級，那么需要去掉此限制。
修改如下：

diff --git a/frameworks/base/services/core/java/com/android/server/pm/PackageInstallerService.java b/frameworks/base/services/core/java/com/android/server/pm/PackageInstallerService.java
index 94f7577..53eea02 100644
--- a/frameworks/base/services/core/java/com/android/server/pm/PackageInstallerService.java
+++ b/frameworks/base/services/core/java/com/android/server/pm/PackageInstallerService.java
@@ -438,7 +438,7 @@ public class PackageInstallerService extends IPackageInstaller.Stub {
throw new SecurityException("User restriction prevents installing");
}

• if ((callingUid == Process.SHELL_UID) || (callingUid == Process.ROOT_UID)) {

• if ((callingUid == Process.SHELL_UID) || (callingUid == Process.ROOT_UID) || (callingUid == Process.SYSTEM_UID)) {
  params.installFlags |= PackageManager.INSTALL_FROM_ADB;

   } else {

  @@ -737,7 +737,7 @@ public class PackageInstallerService extends IPackageInstaller.Stub {
  IntentSender statusReceiver, int userId) throws RemoteException {
  final int callingUid = Binder.getCallingUid();
  mPm.enforceCrossUserPermission(callingUid, userId, true, true, "uninstall");

• if ((callingUid != Process.SHELL_UID) && (callingUid != Process.ROOT_UID)) {
• if ((callingUid != Process.SHELL_UID) && (callingUid != Process.ROOT_UID) && (callingUid != Process.SYSTEM_UID)) {
  mAppOps.checkPackage(callingUid, callerPackageName);
  }

歡迎觀看我發布的各個課程： https://edu.51cto.com/lecturer/8896847.html
或者
我的3折優惠的專題組合課程：
https://edu.51cto.com/topic/2362.html