How To Get Last Fragment Used When Pressing Back Button

I have a simple fragment with this code: private BottomNavigationView.OnNavigationItemSelectedListener navListener = new BottomNavigationView.OnNavigationItemSelectedLi

Solution 1:

You can do this like the following:

@OverridepublicvoidonBackPressed() {
            super.onBackPressed();

            Fragmentfrag= YourActivity.this.getSupportFragmentManager().findFragmentById(R.id.fragment_container);

           if(frag!=null && frag instanceof yourFragment)
           {}

   }

The following will give you count

int count = getSupportFragmentManager().getBackStackEntryCount();

You can make condition, If count is great than 1 then have more than 1 fragments else you have atleast 1 fragment and that will be last fragment. If count 0 then no more fragment available on stack as all have been poped out of stack.

Solution 2:

1. Create an interface:

publicinterfaceIOnBackPressed {
    booleanonBackPressed();
}

2. In Fragment implement IOnBackPressed like:

publicclassFAQFragmentextendsFragmentimplementsIOnBackPressed {
    publicbooleanonBackPressed() {
        returnfalse
    }
}

3. On Main Activity Backpress use

@OverridepublicvoidonBackPressed(){
     if (getSupportFragmentManager().getBackStackEntryCount() > 0) {
          getSupportFragmentManager().popBackStack();
     } 
}