Setting visibility of button when back pressed from a fragment

Question

I have an activity where the user enters some data and submits it via a submit button, that same activity also has some more buttons which lead to fragments.

When I click on the fragments, the submit button of the activity overlaps the UI of the fragment, so in the calling code of fragments I set the visibility of that submit button as invisible but when back pressed from fragment then also that submit button is invisible.

I want the submit button to be visible when activity is being displayed and invisible when the fragments are being displayed.

Answer 1

Add your fragment on button click,

loginSubmit.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            loginSubmit.setVisibility(View.GONE);
            FragmentTransaction ft = getSupportFragmentManager().beginTransaction();
            ft.addToBackStack("LayoutFragment");
            ft.add(R.id.framelayoutfaqs, new LayoutFragment());
            ft.commit();
        }
    });

@Override
public void onBackPressed() {

    if (getSupportFragmentManager().getBackStackEntryCount() > 0) {
        getSupportFragmentManager().popBackStackImmediate();
        loginSubmit.setVisibility(View.VISIBLE);
    } else
        super.onBackPressed();
}

NOTE : make sure you import same Fragment class which you used to create YourFragment . Also choose getSupportFragmentManager() or getFragmentManager() accordingly.

Answer 2

您可以在Activity类的0nBackPressed（）方法中进行处理。

Answer 3

使按钮在片段的onCreate ， onActivityCreated或onAttach方法中不可见，并使其在片段的onDetach方法中可见。