CODEWITHSUNDEEP
androidfragment
user4295158
user4295158

Reputation:

Back button in fragment Android-Related

I have one fragment in which a listview is created. When the list is clicked the same list is refreshed and its child elements are loaded on the same. Could anyone please tell me how to enable the backbutton in android to get the parent list?

Upvotes: 0

Views: 81

Answers (4)

Arj 1411
Arj 1411

Reputation: 1401

Use the method onResume()

@Override
public void onResume() { // TODO Auto-generated method stub
    super.onResume();
}

Upvotes: 0

Vishal Makasana
Vishal Makasana

Reputation: 960

For your simplicity, Define one static variable in your activity that track the which fragment is currently visible, like

public static fragIndex = 0;

then in your fragment oncreateView before returning view set it accordingly to fragments. like in list view fragment

MainActivity.fragIndex = 0;

and for detailed fragment

MainActivity.fragIndex = 1;

now on your activities onbackpressed method do like 

if(fragIndex == 0){
//whatever you want to do.
}else if(fragIndex == 1){
// change the fragment back to list view
}

Upvotes: 0

cnnagpal
cnnagpal

Reputation: 397

You have to take callback from onBackPressed of Activity to Fragment and check in Fragment if there is child elements open or not.

In Activiity

public void onBackPressed()
{
  if(!fragment.onBackPressed())//onBackPressed in fragment is your own function
  {
    super.onBackPressed();
  }
}

In Fragment

public boolean onBackPressed() //your custom onBackPressed not overrided
{
  if(childListOpen)
  {
    //close the child list
    return true;
  }
  else
  {
   // whatever to do in back pressed of list
    return false;
  }   
}

Upvotes: 0

gopalanrc
gopalanrc

Reputation: 274

You can override your activity's onBackPressed() and get the fragment instance by FragmentManager, and do what you want.

Upvotes: 1

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