Android : Accessing container activity object from fragment using putExtra?

Question

I am building a tab interface using Action bar and fragment. I would need assistance in sending data from container activity to the fragment.

To elaborate, I have job object in container activty. And I have created few tabs based on the information in job object (like company details, experience details etc). I need to pass the job object to these fragments so that it can display respective information.

I have created container activity and tab fragments. I would need an example on how to pass the object across them. I cannot use intent.putExtra. Can I access parent container's object from fragment?

Any help shall be appreciated.

Thanks.

have You checked http://developer.android.com/training/basics/fragments/communicating.html ? — sandrstar, Dec 07 '12 at 08:41
Possible duplicate of [Android: how can fragment take a global variable of Activity](http://stackoverflow.com/questions/12364434/android-how-can-fragment-take-a-global-variable-of-activity) — Shirish Herwade, May 10 '17 at 07:14

score 50 · Accepted Answer · edited Nov 29 '13 at 11:59

50

Make the method in your activity, e.g getJob that will return the Job object and its information

MyActivity extends Activity{
Job mJob;

public Job getJob(){
   return this.mJob;
 }
}

then in your Fragment you do this:

MyFragment extends Fragment{

@Override
public void onActivityCreated(){
  super.onActivityCreated();
  ((MyActivity)this.getActivity()).getJob();
 }
}

use getActivity and the method getJob(); to get the object

edited Nov 29 '13 at 11:59

DevC

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answered Dec 07 '12 at 08:41

Artem Zelinskiy

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Many Thanks. I am able to access the object using getActivity(). – user1829067 Dec 07 '12 at 10:06
@Maid786 post your code. I assume that you add fragment to more than ona activity. And then you typecast parent activity to wrong type. Make all your activities iplement some interface ex. IParentActivity and typecast your getActivity result to it – Artem Zelinskiy Jan 06 '14 at 10:39
It returns a single object. How should I implement this for multiple objects? – Machado Apr 14 '15 at 19:20
@Machado Just change return type to Bundle or List> – Artem Zelinskiy May 12 '15 at 11:56

score 2 · Answer 2 · edited May 23 '17 at 12:02

There are multiple ways of achieving this.

Make a static variable to hold your data and access that data from inside the fragments - this is the most fast but it creates bad design patterns if used improperly.
A way of Fragment-to-Fragment communication possible through the parent Activity is posted here: http://developer.android.com/training/basics/fragments/communicating.html You can use the sample code to just do a Activity - Fragment data send.
The top voted answer here: Accessing instance of the parent activity? mentions a way to avoid using static data (1.) and contains source code examples using ActivityGroup

"If you need access to some values in your First activity without making a static reference to it, you could consider putting your activities in an ActivityGroup."

What you choose is your preference, these are just a few options!

Edit: I'm not sure if number 3 will work with fragments since I haven't tested a method similar to it, the example is Activity - Activity communication.

Thanks. I am using alternative suggested by Greensy. If I am stuck, I would try your suggestion. — user1829067, Dec 07 '12 at 10:07

Android : Accessing container activity object from fragment using putExtra?

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