How to save data in Fragment after start another fragment?

Question

I have three fragments A,B,C In fragment A - a get some variable id, from server then i create bundle , put id in it and start fragment B, in this fragment i get id from bundle and display all information by this id on display, but when i start fragment C and then i press button back and return ti fragment B, variable id is null. How can i solve it? I think i can save id in Database,but maybe there is easier way? i understand that when i press back in fragment C, fragment B want to get information from bundle, thats why i make next:

Bundle bundle = getArguments();
if (fakeID == null) {
    fakeID = bundle.getString("fakeID");
}

Edited:

public void onActivityCreated(Bundle savedInstanceState) {
    super.onActivityCreated(savedInstanceState); 
    if (savedInstanceState == null)
    {
        Bundle bundle = getArguments();
        fakeID = bundle.getString("fakeID");
    }
    else{
        fakeID = savedInstanceState.getString("fakeID");
    }
 }
 @Override
public void onSaveInstanceState(Bundle outState) {
    // TODO Auto-generated method stub
    super.onSaveInstanceState(outState);
    outState.putString("fakeID", fakeID);
}

But when i return to this fragment savedInstanceState == null in this statement

if (savedInstanceState == null)

score 1 · Accepted Answer · edited May 23 '17 at 11:49

1

according to this onSaveInstanceState won't be called unless the activity itself has called it. which means if you are in the same activity changing fragments. onSavedInstanceChanged won't be called. Therefore it is null. As the link suggested you have to use either SharedPreferences or Database.

edited May 23 '17 at 11:49

Community

1
1

answered Dec 27 '13 at 09:35

Coderji

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Maybe if (savedInstanceState == null) ID=bundle.getInt("ID) instead ID = 0;? – Kostya Khuta Dec 27 '13 at 09:39
Ya sure! that is a better suggestion for null condition – Coderji Dec 27 '13 at 09:42
1

i will try it now and i will say result to you – Kostya Khuta Dec 27 '13 at 09:45
Are you sure that the ID got its value from the bundle not from the savedInstance?! try to add `Log.d("","");` to check from where the value are coming from – Coderji Dec 27 '13 at 10:32
Yes, i have used SharedPreferences and all works fine. – Kostya Khuta Dec 27 '13 at 17:50
1

Delete plesase you idea about SavedInstance and i will check your answer – Kostya Khuta Dec 27 '13 at 17:51

How to save data in Fragment after start another fragment?

1 Answers1