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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(tǒng)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(yīng)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) || (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");
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