How to get the view id in Android

Question

In a layout, when a view has the attribute android:id=”@+id/identifier”, it means that :

Accepted Answer

the view has the identifier “identifier” which is unique to the layout

Answer

the view has the identifier “identifier” which is unique to the project

Answer

the view has the identifier “identifier” which can be reused within the same layout

Answer

the view will have the identifier “identifier” as much as possible

Question from the Android test