important: how to end background fragment

[MasoudMHS]

hi i create 5 fragment in this library, whenever i switched between fragment and return to firs fragment, the radio buttom or spinners or ... reamin just like i have change them at first. i want to end fragment and all its views when i switched to another one.

i use onDestroy and onPause but its not useful i read some issue that i shoud use "fragmentTransaction.replace" instead of "fragmentTransaction.add" but where is "fragmentTransaction" in this library????