CODEWITHSUNDEEP
androidandroid-fragments
venu
venu

Reputation: 2979

How to clear Fragment backstack in android

hi how to clear fragment back stack am using below logic it's not working...

for(int i = 0; i < mFragmentManager.getBackStackEntryCount(); ++i) {            
     mFragmentManager.popBackStack();
}

help me..

Upvotes: 55

Views: 85018

Answers (6)

sajid45
sajid45

Reputation: 539

The best option I ever seen is here.

            int count = getSupportFragmentManager().getBackStackEntryCount();
            if (count > 0) {
                getSupportFragmentManager().popBackStack(null, FragmentManager.POP_BACK_STACK_INCLUSIVE);
            }

Upvotes: 0

Blackbelt
Blackbelt

Reputation: 157437

one way is to tag the backstack and when you want to clear it

mFragmentManager.popBackStack("myfancyname", FragmentManager.POP_BACK_STACK_INCLUSIVE);

where the "myfancyname" should match the string you used with addToBackStack. E.g.

Fragment fancyFragment = new FancyFragment();     
fragmentTransaction.replace(R.id.content_container, fancyFragment, "myfragmentag");
fragmentTransaction.addToBackStack("myfancyname");

the backstack's name and the fragment's tag name can be the same but there are no constrains on this regard

From the documentation

If set, and the name or ID of a back stack entry has been supplied, then all matching entries will be consumed until one that doesn't match is found or the bottom of the stack is reached. Otherwise, all entries up to but not including that entry will be removed.

if you don't want to use a name for your backstack you can pass use a first parameter 

 mFragmentManager.popBackStack(null, FragmentManager.POP_BACK_STACK_INCLUSIVE);

Upvotes: 17

dracula
dracula

Reputation: 4473

Try this

mFragmentManager.popBackStack(null, FragmentManager.POP_BACK_STACK_INCLUSIVE);

Upvotes: 125

JeanK
JeanK

Reputation: 302

while (getSupportFragmentManager().getBackStackEntryCount() > 0){
    getSupportFragmentManager().popBackStackImmediate();
}

Upvotes: 20

johnarleyburns
johnarleyburns

Reputation: 1572

Answer above is almost correct, but you need a guard around the fragment back list as it can be empty:

private void clearBackStack() {
    FragmentManager manager = getSupportFragmentManager();
    if (manager.getBackStackEntryCount() > 0) {
        FragmentManager.BackStackEntry first = manager.getBackStackEntryAt(0);
         manager.popBackStack(first.getId(), FragmentManager.POP_BACK_STACK_INCLUSIVE);
    }
}

Upvotes: 83

Richard Fung
Richard Fung

Reputation: 1020

This is a bit late but I just had this problem myself. You can do:

FragmentManager manager = getFragmentManager();
FragmentManager.BackStackEntry first = manager.getBackStackEntryAt(0);
manager.popBackStack(first.getId(), FragmentManager.POP_BACK_STACK_INCLUSIVE);

Pretty self explanatory; you just get the first entry, get its id, and then pop everything up to and including the entry with that id.

Upvotes: 12

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