Is it possible to start an activity on the stack, clearing the entire history before it?
The situation
I have an activity stack that either goes A->B->C or B->C (screen A selects the users token, but many users only have a single token).
In screen C the user may take an action which makes screen B invalid, so the application wants to take them to screen A, regardless of whether it is already in the stack. Screen A should then be the only item on the stack in my application.
Notes
There are many other similar questions, but I haven’t found anything that answers this exact question. I tried calling getParent().finish() – this always results in a null pointer exception. FLAG_ACTIVITY_CLEAR_TOP only works if the activity is already on the stack.