How to pop fragment off backstack

Question

I have an activity A, which calls fragment Bf, which calls fragment Cf. I want Bf to be placed in the backstack when Cf is called so that users can navigate back to it. Ho

Answer 1

Three ways to pop Fragment off BackStack

Simply add any of these lines:

1)

getActivity().getSupportFragmentManager().popBackStack();

2)

getActivity().getSupportFragmentManager().popBackStack(null, FragmentManager.POP_BACK_STACK_INCLUSIVE);

3)

getActivity().getSupportFragmentManager().popBackStackImmediate(null, FragmentManager.POP_BACK_STACK_INCLUSIVE);

They're all easy ways to pop fragment off Backstack

Answer 2

Here's example to pop last fragment using BackStackEntry

val manager = supportFragmentManager
try {
    // get last entry (you can get another if needed)
    val entry = manager.getBackStackEntryAt(manager.backStackEntryCount - 1)
    // you can pop it by name
    manager.popBackStack(entry.name, FragmentManager.POP_BACK_STACK_INCLUSIVE)
    // or pop by id
    manager.popBackStack(entry.id, FragmentManager.POP_BACK_STACK_INCLUSIVE)
} catch (ex: Exception) {
    ex.printStackTrace()
}

Answer 3

first replacing fragment container_view that time we add name as like "Later Transaction"

   getSupportFragmentManager().beginTransaction().replace(R.id.container_view, 
    profileFragment, "Profile").addToBackStack("Later Transaction").commit();

then on back press button pop the back stack using the Later Transaction name

     int count = getSupportFragmentManager().getBackStackEntryCount();
    if(count > 1) {
     getSupportFragmentManager().popBackStack("Later Transaction", 
     FragmentManager.POP_BACK_STACK_INCLUSIVE);
    } else {
        DialogUtils.show(HomeActivity.this, 
        getString(R.string.exit_app_message), getString(R.string.alert), 
       "Yes","No", new DialogUtils.ActionListner() {
            @Override
            public void onPositiveAction() {
                finish();
            }
            @Override
            public void onNegativeAction() {
            }
        });
    }

Answer 4

You can pop the fragment by name. While adding fragments to the back stack, just give them a name.

fragmentTransaction.addToBackStack("fragB");
fragmentTransaction.addToBackStack("fragC");

Then in Fragment_C, pop the back stack using the name ie.. fragB and include POP_BACK_STACK_INCLUSIVE

someButtonInC.setOnClickListener(new View.OnClickListener() {

    @Override
    public void onClick(View v) {

        FragmentManager fm = getActivity()
                .getSupportFragmentManager();
        fm.popBackStack ("fragB", FragmentManager.POP_BACK_STACK_INCLUSIVE);
    }
});