Fragment still exists after remove?

1 Add two fragments to FragmentManager

FragmentManager fm = getSupportFragmentManager();
FragmentTransaction ft1 = fm.beginTransaction();
ft1.add(containerId, fragment1, "fragment1");

FragmentTransaction ft2 = fm.beginTransaction();
ft2.add(containerId, fragment2, "fragment2");

2 Change mobile setting Developer Options-> Don't Keep Activities-> ON

3 Remove all fragments after activity was recreated

FragmentTransaction ft3 = fm.beginTransaction();
for(Fragment f : fm.getFragments())  ft3.remove(f); 

My question is why fm.findFragmentByTag("fragment1") is NOT null after remove?

minSdkVersion 17 targetSdkVersion 22 compileSdkVersion 22

try this code for remove the fragment

FragmentManager manager = getActivity().getSupportFragmentManager();
FragmentTransaction trans = manager.beginTransaction();

i think you have not add this method




Fragments, (), the replace transaction is saved to the back stack so the user can reverse the transaction and bring back the previous fragment by pressing the Back button. use popBackStackImmediate() instead of popBackStack() which insure fragment is removed from backstack immediately. transection's remove method does not remove fragment from backstack it just for transection.

use popBackStackImmediate() instead of popBackStack() which insure fragment is removed from backstack immediately. transection's remove method does not remove fragment from backstack it just for transection.

What is the meaning of addToBackStack with null parameter , Re-attach a fragment after it had previously been detached from the UI with detach( . Remove an existing fragment. Rules for Finding and Fixing Fragments. What is a fragment? • What are the different kinds of fragments? • How do I fix a fragment? Fragment Tip 1 • Fragment Tip 2 • Fragment Tip 3. Recognize the difference between a sentence and a fragment. A fragment resembles a sentence in two ways.

Try this...

    List<Fragment> list = getSupportFragmentManager().getFragments();
    if (list == null) {
        Log.e("TAg", "No existing fragments" );

    for (Fragment frag : list)
        // To save any of the fragments, add this check.
        // A tag can be added as a third parameter to the fragment when you commit it
        if (frag.getTag().equals("tag-name")) {


FragmentTransaction, public void clearStack() { //Here we are clearing back stack fragment entries int popBackStackImmediate(); } } //Here we are removing all the fragment that are App not installed;The package conflicts with an existing package by the same  Once the activity reaches the resumed state, you can freely add and remove fragments to the activity. Thus, only while the activity is in the resumed state can the lifecycle of a fragment change independently. However, when the activity leaves the resumed state, the fragment again is pushed through its lifecycle by the activity. Example

instead of the

ft1.add(containerId, fragment1, "fragment1");


ft1.replace(containerId, fragment1, "fragment1");

and use the


Remove fragment with clear back stack, During last week's class, my students learned that Fragments (since Android UI (the Fragment is removed from the UI, however its state is still being by the FragmentManager). hide(fragment): Hides an existing Fragment. However, if you just restore the database on top of an existing replicated database as shown below, you get orphan replication configurations. You can cleanup many processes to drop the Log Reader and Distribution agent jobs, but even after that if you query the "Distribution.dbo.MSpublications" table you often still see that records exist.

you should commit individual fragment remove transactions.

this code will commit after loop complete

for(Fragment f : fm.getFragments())  ft3.remove(f); 

instead of use brackets

for(Fragment f : fm.getFragments()){

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