Is this the right way to clean-up Fragment back stack when leaving a deeply nested stack?

Well there are a few ways to go about this depending on the intended behavior, but this link should give you all the best solutions and not surprisingly is from Dianne Hackborn

http://groups.google.com/group/android-developers/browse_thread/thread/d2a5c203dad6ec42

Essentially you have the following options

• Use a name for your initial back stack state and useFragmentManager.popBackStack(String name,FragmentManager.POP_BACK_STACK_INCLUSIVE).
• Use FragmentManager.getBackStackEntryCount()/getBackStackEntryAt().getId()to retrieve the ID of the first entry on the back stack, andFragmentManager.popBackStack(int id,FragmentManager.POP_BACK_STACK_INCLUSIVE).
• FragmentManager.popBackStack(null, FragmentManager.POP_BACK_STACK_INCLUSIVE)is supposed to pop the entire back stack... I think the documentation forthat is just wrong. (Actually I guess it just doesn't cover the case whereyou pass in POP_BACK_STACK_INCLUSIVE),

The other clean solution if you don't want to pop all stack entries...

getSupportFragmentManager().popBackStack(null, FragmentManager.POP_BACK_STACK_INCLUSIVE);getSupportFragmentManager().beginTransaction().replace(R.id.home_activity_container, fragmentInstance).addToBackStack(null).commit();

This will clean the stack first and then load a new fragment, so at any given point you'll have only single fragment in stack

Thanks to Joachim answer, I use the code to clear all back stack entry finally.

// In your FragmentActivity use getSupprotFragmentManager() to get the FragmentManager.// Clear all back stack.int backStackCount = getSupportFragmentManager().getBackStackEntryCount();for (int i = 0; i < backStackCount; i++) {    // Get the back stack fragment id.    int backStackId = getSupportFragmentManager().getBackStackEntryAt(i).getId();    getSupportFragmentManager().popBackStack(backStackId,         FragmentManager.POP_BACK_STACK_INCLUSIVE);} /* end of for */