OnBack Press Fragment showing blank Screen

Question

I am using Fragments in my Application.So on the home page i have a grid view of 5 item on selection of which again i am opening a new fragment .

So what is happening is on back press it is showing a blank screen after that it is closing the application .

Please suggest me what i have done wrong in this.

MyCode

gridView.setOnItemClickListener(new OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> arg0, View v, int arg2,
                    long arg3) {
                if (DASHBOARD_LINKS[arg2].equals("A")) {
                    fragTran.replace(R.id.content_frame,
                                firstFrag);
                        fragTran.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_OPEN);
                        fragTran.addToBackStack(null);
                        fragTran.commit();

                }
                if (DASHBOARD_LINKS[arg2].equals("B")) {
                    fragTran.replace(R.id.content_frame, secondFrag);
                    fragTran.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_OPEN);
                    fragTran.addToBackStack(null);
                    fragTran.commit();
                }
                if (DASHBOARD_LINKS[arg2].equals("C")) {
                    fragTran.replace(R.id.content_frame, thirdFarg);
                    fragTran.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_OPEN);
                    fragTran.addToBackStack(null);
                    fragTran.commit();
                }
            }
        });

Please help my this is happening

it's because you are adding nothing but `null` to your `fragTran.addToBackStack(null);` method — Spring Breaker, Mar 06 '14 at 10:32
so what i have to do with this will u please suggest me something in this — Pooja Dubey, Mar 06 '14 at 10:34
I am not that clear in this but `fragTran.addToBackStack("Tag");` this worked for me. — Spring Breaker, Mar 06 '14 at 10:36
Just a `String` to identify a `Fragment`.Once again I am not fully clear on it.please read the documentation to get a clear idea. — Spring Breaker, Mar 06 '14 at 10:38
see this http://stackoverflow.com/questions/32132623/onback-pressed-data-not-showing-in-fragments — Aditya Vyas-Lakhan, Jan 04 '16 at 10:56

score 18 · Accepted Answer · answered Mar 06 '14 at 11:15

18

My suggestion for you is that let addToBackStack(null) in the fragment call.

But remove this line addToBackStack(null)

from the Homepage after which onbackpress you are getting the blank screen hope this will for you .

answered Mar 06 '14 at 11:15

Developer

6,292
19
55
115

8

Though it is preferred answer. I don't understand what are you trying to say – Virtu Sep 02 '15 at 09:11
1

Thanks, i know its been a year since this question was asked. but removing `addToBackStack(null) `for the first transition fixed mine. – miqe Oct 19 '15 at 20:25
@Developer, your answer is so confusing. I want to use onBackstackchangedlistener too, but if I remove addToBackStack then onBackstackchangedlistener never works. – Gaurav Arora Nov 24 '16 at 08:40
Thats not the correct answer. Please follow this link. https://stackoverflow.com/a/53813425/1298105 – Calyfs0 Dec 17 '18 at 10:40
Solution is confusing. – Bilal Shahid Mar 22 '19 at 18:02

score 5 · Answer 2 · answered May 02 '17 at 05:57

Fragment showing blank solutions.

Make sure to add first Base Fragment without addToBackStack() method. Because it is responsible for Navigation Back. We don't want to go back from first Page. So don't add it to backStack.
While moving from Fragment A to Fragment B if you have call fragmentTransacation.add then while comming back from B to A. onViewCreated or onResume method will not called as you have added a fragment to it. So in order to hit onResume or onViewCreated while going back to Fragment A. you should call fragmentTransaction.replace

score 2 · Answer 3 · answered Feb 14 '17 at 17:33

@Override
public void onBackPressed() {
    int fragments = getSupportFragmentManager().getBackStackEntryCount();
    if (fragments == 1) {
        finish();
    } else {
        if (getFragmentManager().getBackStackEntryCount() > 1) {
            getFragmentManager().popBackStack();
        } else {
            super.onBackPressed();
        }
    }
}

score 1 · Answer 4 · answered Nov 20 '17 at 11:23

1

addToBackStack() <--dont include this for your first fragment.-->

if(getSupportFragmentManager().getBackStackEntryCount() !=1){
                fragmentTransaction.addToBackStack("placeholder");
            }

answered Nov 20 '17 at 11:23

Vishnu Kant Agarwal

189
1
9

score 0 · Answer 5 · edited May 23 '17 at 12:09

0

I am assuming that you want to handle back button press. You can do the following,

before transitioning between Fragments, call addToBackStack() like the following,

 fragTran.replace(R.id.content_frame, secondFrag);
                    fragTran.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_OPEN);
                    fragTran.addToBackStack("TAG");
                    fragTran.commit();

For clear info please see this post https://stackoverflow.com/a/7992472/1665507

edited May 23 '17 at 12:09

Community

1
1

answered Mar 06 '14 at 10:43

Spring Breaker

8,233
3
36
60

same issue it is showing a blank screen then it is closing the application – Pooja Dubey Mar 06 '14 at 10:47
@PoojaDubey: Well I guess there is some other problem in your code, because the above way works.You can check the sample from here https://www.dropbox.com/s/iup67qfwkx5uzqo/FragmentsTest.rar – Spring Breaker Mar 06 '14 at 11:05

score 0 · Answer 6 · answered Mar 07 '18 at 10:48

0

This will happen if you navigating fragment from one activity to the fragment of the second activity. And while replacing your fragment you are adding them into backstack, so don't add the first fragment of respective activities into backstack.

answered Mar 07 '18 at 10:48

Manasvi

450
7
9

score 0 · Answer 7 · answered Dec 17 '18 at 10:53

0

Update your OncreateView() method :

public View onCreateView(LayoutInflater inflater, ViewGroup container,
    Bundle savedInstanceState) {
    if (view != null) {
    if (view.getParent() != null) {
        ((ViewGroup)view.getParent()).removeView(view);
    }
    return view;
}

View v=inflater.inflate(R.layout.tests, container, false);

Hope this helps!!

answered Dec 17 '18 at 10:53

Calyfs0

111
1
11

Forgot to add. Declare View view; at the top – Calyfs0 Dec 17 '18 at 10:54

OnBack Press Fragment showing blank Screen

7 Answers7

Linked