It’s possible to arrange for two apps to share the same Linux user ID, in which case they are able to access each other’s files. To conserve system resources, apps with the same user ID can also arrange to run in the same Linux process and share the same VM. The apps must also be signed with the same certificate.

What is the role of apps Linux user ID in Android?

The Android platform takes advantage of the Linux user-based protection to identify and isolate app resources. This isolates apps from each other and protects apps and the system from malicious apps. To do this, Android assigns a unique user ID (UID) to each Android application and runs it in its own process.

What is SharedUserId?

SharedUserId is used to share the data,processes etc between two or more applications. It is defined in AndroidManifest. xml like, <manifest xmlns_android=” android_sharedUserId=”android. uid.