In most cases, every Android application runs in its own Linux process. … Instead, it is determined by the system through a combination of the parts of the application that the system knows are running, how important these things are to the user, and how much overall memory is available in the system.

Why does Android run an app inside a separate process?

Android processes: explained!

As such, each application runs in its own process (with a unique PID): this allows the app to live in an isolated environment, where it cannot be hindered by other applications/processes.

How many processes occur in an android life cycle?

The Three Lives of Android

The Entire Lifetime: the period between the first call to onCreate() to a single final call to onDestroy(). We may think of this as the time between setting up the initial global state for the app in onCreate() and the release of all resources associated with the app in onDestroy().