Remove All Activities From Back Stack While Calling A New Activity

Possible Duplicate: Android: Clear the back stack Is there any way to clear the back_Stack when I am calling a new Activity which not present in the back_Stack?(I am using Api v

Solution 1:

Without knowing your precise requirements, it is difficult to give you an exact answer, but you can use tasks to achieve what you need. If you have 3 activities named A, B & C. If you set C to have a different taskAffinity to A & B in the Manifest, then a separate back stack is used for C. If you then set clearTaskOnLaunch="true" for A in the manifest, then the back stack will clear when the user leaves that task. So, app launch loads activity A. The user clicks a button which launches B. If the user now clicks back, they return to A. If from B the user clicks a button to launch C, then the back stack of the task for A & B is cleared, and if the user then hits back they are taken back to A.

A full explanation of this can be found at Handling Affinities and Clearing the back stack.