How do handle onBackPressed() in Fragment?

Question

This is my class name

public class PrimaryFragment extends Fragment implements OnRestartRequest {

    @Override
    public void onBackPressed() {
        if (mCardStackLayout.isCardSelected()) {
            mCardStackLayout.restoreCards();
        } else {
            super.onBackPressed();
        }
    }

Error on this line: super.onBackPressed();

I don't know what's the problem in fragment class's on back pressed button.

Check this post- http://stackoverflow.com/questions/5448653/how-to-implement-onbackpressed-in-android-fragments?rq=1 — Harish Gyanani, Aug 09 '16 at 13:18
Please, read carefully http://stackoverflow.com/help/how-to-ask — UeliDeSchwert, Aug 09 '16 at 13:19
Hello, my answer it's [here](https://stackoverflow.com/questions/5448653/how-to-implement-onbackpressed-in-fragments/46425415#46425415) Hop it help — Maxime Jallu, Dec 21 '17 at 12:56

score 6 · Answer 1 · edited Aug 17 '18 at 10:15

6

There is no onBackPressed() method in Fragment. You can do something like calling getActivity().onBackPressed() from your Fragment.

edited Aug 17 '18 at 10:15

AskNilesh

67,701
16
123
163

answered Aug 09 '16 at 13:16

Smit Davda

638
5
15

score 3 · Answer 2 · answered Aug 19 '16 at 12:22

Fragment does not have onBackPress() method as we have for activity. I prefer handling back press using below code, Hope it help you:

 private void handleBackPress(View view) {


        view.setFocusableInTouchMode(true);
        view.requestFocus();
        view.setOnKeyListener( new View.OnKeyListener()
        {
            @Override
            public boolean onKey( View v, int keyCode, KeyEvent event )
            {
                if( keyCode == KeyEvent.KEYCODE_BACK )
                {

                    cancelCountDownTimerAndSaveValues();

                    if (Constants.Fragments.CurrentFragment != null)
                    {
                         getActivity().getSupportFragmentManager().popBackStack();

                    }

                    return true;
                }
                return false;
            }
        } );
    }

and here view is your main view for fragment as you get from

View view = inflater.inflate(R.layout.xxxxx, container, false);

score 1 · Answer 3 · answered Aug 09 '16 at 13:21

1

You should call getActivity() from inside you fragment like this:

getActivity().onBackedPressed();

Note: watch that you import the right getActivity(), If you use android.support.v4.app.Fragment you need to import the correct package.

answered Aug 09 '16 at 13:21

Nir Duan

6,164
4
24
38

score 0 · Answer 4 · answered Aug 09 '16 at 13:20

Fragmetns doesn't have their own OnBackPressed and you have to handle their transaction from its parent Actvitiy which contains that fragment.

Example: // in Parent Activity on Fragmetn

@Override
public void onBackPressed() {
    // This will get you total fragment in the backStack
    int count = getFragmentManager().getBackStackEntryCount();
    switch(count){
        case 0:
            super.onBackPressed();
            break;
        case 1:
            // handle back press of fragment one
            break;
        case 2:
            // and so on for fragment 2 etc
            break;
        default:
            getFragmentManager().popBackStack();
            break;
    }
}

How do handle onBackPressed() in Fragment?

4 Answers4