How to remove Fragment transactions in middle

Question

I have 5 fragments(say A, B, C, D, E) and one activity with a container. Whenever i want to add a fragment to a container I'll be using the following code.

getSupportFragmentManager().beginTransaction().replace(R.id.mainContainerRL, fragment, tag).addToBackStack(tag).commit();

Let's say i added Fragment A. Upon some action in A, I added fragment B. Upon some action in B, I added fragment C. Upon some action in C, I added fragment D. Upon some action in D, I added fragment E.

Now my stack should be as follows. A -> B -> C -> D -> E

Now upon some action in Fragment E, I need to remove fragments D, C, B so that when user click back, he should directly see Fragment A.

I tried using following code.

public void removeScreen(@NonNull String tag) {
    FragmentManager manager = getSupportFragmentManager();
    Fragment fragment = manager.findFragmentByTag(tag);
    if (fragment != null) {
        FragmentTransaction trans = manager.beginTransaction();
        trans.remove(fragment);
        trans.commitAllowingStateLoss();
    }
}

Upon some action in Fragment E, I called the above function with Tags of Fragment D, C, B(Tags are same as the one that i used for fragment transaction).

Now when i click back button fragment D is becoming visible but i was expecting fragment A.

It would be very helpful if somebody points out where am i going wrong.

When user clicks the back button then you can use 'fragmentManager.popBackStack()' to remove E, D, C, B fragments. — amit singh, Jul 15 '16 at 06:51
If i do fragmentManager.popBackStack(), then Fragment E will be removed first. But i want to retain Fragment E and remove Fragments B,C,D which are in background.. — Harish_N, Jul 15 '16 at 06:54
hi, do you fix the issue, in my case, the fragment is overlapped. — Priyanka, May 25 '18 at 08:05

score 1 · Answer 1 · answered Jul 15 '16 at 07:21

1

If you want to reach exactly the same behavior that you've described, you can do it by this way:

FragmentManager manager = getSupportFragmentManager();
manager.popBackStack(null, FragmentManager.POP_BACK_STACK_INCLUSIVE);

This will clear all backstack until the bottom of stack will be reached.

answered Jul 15 '16 at 07:21

romtsn

11,704
2
31
49

What if my requirement is to remove B, C fragments after some action in fragment E without going back to A immediately? After it I need to go to F and G fragments and then back from fragment F to fragment A by a multiple pressing of "back" key and I have to ignore B and C fragments completely on this way. Any solution? – isabsent May 29 '18 at 07:29

score 0 · Answer 2 · answered Jul 15 '16 at 07:13

0

I prefer using DialogFragment for this reason and pop them using interface callbacks and dismiss() function inside them. This is the easiest and quick way to implement what you are trying to do.

answered Jul 15 '16 at 07:13

Sourav Chandra

843
12
21

score 0 · Answer 3 · answered Jul 15 '16 at 07:47

0

I think your problem occur here :

replace :

getSupportFragmentManager().beginTransaction().replace(R.id.mainContainerRL, fragment, tag).addToBackStack(tag).commit();

to：

getSupportFragmentManager().beginTransaction().add(R.id.mainContainerRL, fragment, tag).addToBackStack(tag).commit();

when you add your fragment to container,tou just add it ,if use"replace" method,you romove it from activirty's fagment manager,it case your "removeScreen" method did not work

answered Jul 15 '16 at 07:47

walker

1

I want to use replace otherwise all fragments added will be kept in memory. Read http://stackoverflow.com/questions/18634207/difference-between-add-replace-and-addtobackstack – Harish_N Jul 15 '16 at 07:55
In most cases `add` is a bad choice. Use `remove` wherever it is possible. – CoolMind Mar 27 '19 at 09:13

How to remove Fragment transactions in middle

3 Answers3