I have an app (Java) which loads a fragment (Fragment A). This fragment has a recyclerView which in turn loads a second fragment (Fragment B). I want Fragment B to have a back arrow that can return to Fragment A, but I don't want the back arrow in Fragment A.
I added this code to the Main Activity:
Toolbar toolbar = findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
But this causes the back arrow to appear in every fragment.
How can I have the back arrow appear only on second level fragments (like B)?
CodePudding user response:
you can hide the button on the wanted fragment like this
@Override
public void onResume() {
super.onResume();
((AppCompatActivity)getActivity()).getSupportActionBar(). setDisplayHomeAsUpEnabled(false);
}
@Override
public void onStop() {
super.onStop();
((AppCompatActivity)getActivity()).getSupportActionBar(). setDisplayHomeAsUpEnabled(true);
}