Why I got onBackPressed issue in Android

Question

when I click on the back press on real device it went to the home page not to the previous page ,here I am Using fragments how to solve that issue

In First Fragment

NotesFragment notes = new NotesFragment();
FragmentManager manager = getFragmentManager();
FragmentTransaction transaction = manager.beginTransaction();
transaction.replace(R.id.day_fragment_mainLayout, notes);
transaction.addToBackStack(null);
transaction.commit();

in Second Fragment

DayFragment day = new DayFragment();
FragmentManager manager = getFragmentManager();
FragmentTransaction transaction = manager.beginTransaction();
transaction.addToBackStack(null);
transaction.replace(R.id.day_fragment_mainLayout, day);
transaction.commit();

in Third Fragment

ItemsFragment items = new ItemsFragment();  
FragmentManager manager = getFragmentManager();
FragmentTransaction transaction = manager.beginTransaction();
transaction.addToBackStack(null);
transaction.replace(R.id.day_fragment_mainLayout, items);
transaction.commit();

when i click on backpress button its goes to the home page,bt i need prevoius page.

note: btnclick i am using to navigating fragments one to one

Please go through this link http://stackoverflow.com/questions/27717127/how-to-handle-backpress-with-fragment/27717201#27717201 — sandeepmaaram, Feb 02 '15 at 09:49
your first fragment is replaced by second fragment and second fragment is replaced by third fragment.. And when you are on third fragment and click on back button, you are navigated to home page instead of second fragment.. is that correct? — iMDroid, Feb 02 '15 at 10:15

score 1 · Answer 1 · answered Feb 02 '15 at 09:48

1

You could achieve it by using FragmentTransaction's add() method, and then override onBackPressed where you have to pop your FragmentManager's back stack. This will result in the behaviour you described.

answered Feb 02 '15 at 09:48

Zsolt Boldizsar

2,447
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Vladislav Kan · Answer 2 · 2015-02-02T11:44:12.243

0

You cannot go back because you didn't open any new activity. OnBackPressed is moving you to the previous activity stored in the stack. If you want to go back to the previous fragment, you have to store the previous fragment somewhere and then use:

@Override
public void onBackPressed() {
// here you should change the fragment
    transaction.replace(YOUR_PREVIOUS_FRAGMENT, items);
    transaction.commit();
}

Thanks for attention!

edited Feb 02 '15 at 11:44

answered Feb 02 '15 at 09:49

Vladislav Kan

354
1
12

when i use this transaction.replace(YOUR_PREVIOUS_FRAGMENT, items); transaction.commit(); – Manikanta Reddy Feb 02 '15 at 10:03
Please Help me any one – Manikanta Reddy Feb 02 '15 at 10:06
Ok, lets say you have 3 fragments: fragment1, fragment2, fragment3. When you open fragment 1, you should save it somewhere before opening new fragment(fragment2), lets say in a variable : int lastFragment; When you press back button, you just check the lastFragment and open a fragment stored there – Vladislav Kan Feb 02 '15 at 10:08
forgot to say, you have to override the onBackPressed(){ transaction.replace(lastFragment, items); transaction.commit();} – Vladislav Kan Feb 02 '15 at 10:10
Yet not i didnt get a solution please help me any one – Manikanta Reddy Feb 02 '15 at 11:27
In First Fragment I have a button called addnote in side that button onclick i wrote this logic – Manikanta Reddy Feb 02 '15 at 11:41
private void NextFragment() { NotesFragment notes = new NotesFragment(); FragmentManager manager = getFragmentManager(); FragmentTransaction transaction = manager.beginTransaction(); transaction.addToBackStack(null); transaction.replace(R.id.fragment_mainLayout, notes); transaction.commit(); } – Manikanta Reddy Feb 02 '15 at 11:44
the code that i pasted should be in the activity.... actually I'm confused now =) – Vladislav Kan Feb 02 '15 at 11:52
I got Answer i use getActivirty().onBackPressed(); – Manikanta Reddy Feb 03 '15 at 09:36

Why I got onBackPressed issue in Android

2 Answers2