Application Fundamentals
How android app run in android operating system with security features:
So every android app relies on the Linux kernel.
- By default, android system gives each app a unique Linux user ID which is used only by the system and is unknown to the app.
- Android system sets permissions for all the data in an app so that only the user ID assigned to that app can access them.
- Each process has its own virtual machine (VM), so an app’s program runs in isolation from other apps.
- By default, every app runs in its own Linux process. The Android system starts the process when any of the app’s components need to be executed.
