Different onBackPressed for activity and fragment

Question

My app flow is:

Activity A -> Activity B (this activity has buttons which on click open fragments)

I want that when I am on Activity B's fragments, on back pressed the flow should be to Activity B and when I am on Activity B then on back pressed app should exit.

I am currently using:

@Override
public void onBackPressed() {

    if(getFragmentManager().getBackStackEntryCount() > 0) {
        getFragmentManager().popBackStackImmediate();
    }

    else {
        super.onBackPressed();
    }
}

It's working fine when back pressed on Activity B's fragments, but it's going to Activity A when pressed back from Activity B(and that too for some reason nothing is being displayed in Activity A).

EDIT

My code for calling fragment:

faqsBtn.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            mLoginSubmit.setVisibility(View.GONE);
            Bundle b1 = new Bundle();
            b1.putString("ComingFrom","Login");
            android.support.v4.app.Fragment faqsFragment = new fragment11Faqs();
            faqsFragment.setArguments(b1);
            android.support.v4.app.FragmentTransaction transaction = getSupportFragmentManager().beginTransaction();
            transaction.replace(R.id.framelayoutfaqs,faqsFragment);
            transaction.addToBackStack(faqsFragment.toString());
            transaction.commit();
        }
    });

Possible duplicate of [Exit android app on back pressed](https://stackoverflow.com/questions/21253303/exit-android-app-on-back-pressed) — Stuti Verma, Jun 20 '18 at 18:03

Quick learner · Accepted Answer · 2018-06-21T04:44:09.957

2

You should call finish() when you call Activity B right after declaring its intent from ActivityA

Like this

Intent intent=new Intent(ActivityA.this,ActivityB.class);
startActivity(intent);
finish();

And you code for backstack is fine in activity b just add finish() after super.onBackPressed();

@Override
public void onBackPressed() {

    if(getFragmentManager().getBackStackEntryCount() > 0) {
        getFragmentManager().popBackStackImmediate();
    }

    else {
        super.onBackPressed();
        finish();
    }
}

Here is how to add fragment to backstack

 Fragment cameraEditing = new Editing(); FragmentManager
 fragmentManager = getFragmentManager(); FragmentTransaction 
fragmentTransaction = fragmentManager.beginTransaction(); 
fragmentTransaction.replace(R.id.cameraLayout, 
cameraEditing,"cameraEditing"); 
fragmentTransaction.addToBackStack("cameraEditing");
 fragmentTransaction.commit();

edited Jun 21 '18 at 04:44

answered Jun 20 '18 at 18:23

Quick learner

10,632
4
45
55

This is exiting the app even when I press back on the fragments – Dpka Jun 20 '18 at 18:57
Did you add the fragments to back stack ? – Quick learner Jun 20 '18 at 18:58
can you tell me how do I do that? – Dpka Jun 20 '18 at 19:00
Well when u write the code to add or replace fragment ,you just have to add the line - addtobackstack() then it will add it to backstack ,you can see the code on Google by how to add fragment to back stack ,then this code will work dear – Quick learner Jun 20 '18 at 19:02
That's wrong ,don't pass null ,pass the fragment name there ,better if you see how to add fragment to backstack – Quick learner Jun 20 '18 at 19:03
oh okay, and I can't pass fragment name there as it is asking for String – Dpka Jun 20 '18 at 19:06
Let's say your fragment is HomeFrgament then pass"HomeFragment" as a string argument – Quick learner Jun 20 '18 at 19:08
I am sorry but it's not working, I have posted my fragment call above in the edited section, please guide me – Dpka Jun 20 '18 at 19:14
Please just look how to add fragment in backstack dear – Quick learner Jun 20 '18 at 19:15
And when u do that ,add the code which I answered and let me know if it helped or not – Quick learner Jun 20 '18 at 19:17
sure will do :) – Dpka Jun 20 '18 at 19:18
Well I added that in my answer and use it please – Quick learner Jun 20 '18 at 19:20
It actually worked by instead of putting finish() i wrote return and it worked with addtobackstack(null) – Dpka Jun 20 '18 at 19:30
I am glad it worked dear ,please accept my answer for others to refer it also – Quick learner Jun 20 '18 at 19:34
Happy coding dear – Quick learner Jun 20 '18 at 19:38

Different onBackPressed for activity and fragment

1 Answers1