How to use setArguments() and getArguments() methods in Fragments?

Question

I have 2 fragments: (1)Frag1 (2)Frag2.

Frag1

bundl = new Bundle();
bundl.putStringArrayList("elist", eList);

Frag2 dv = new Frag2();
dv.setArguments(bundl);
FragmentTransaction ft = getFragmentManager().beginTransaction();
ft.replace(R.id.the_fragg,dv);
ft.show(getFragmentManager().findFragmentById(R.id.the_fragg)); 
ft.addToBackStack(null);
ft.commit();

How do I get this data in Frag2?

ashakirov · Answer 1 · 2022-09-01T13:39:17.657

197

Just call getArguments() in your Frag2's onCreateView() method:

public class Frag2 extends Fragment {
    
     public View onCreateView(LayoutInflater inflater,
         ViewGroup containerObject,
         Bundle savedInstanceState){
         //here is your arguments
         Bundle bundle=getArguments(); 
  
        //here is your list array 
        String[] myStrings=bundle.getStringArray("elist");   
     }
}

EDIT:

Best practice is read and save arguments in onCreate method. It's worse to do it in onCreateView because onCreateView will be called each time when fragment creates view (for example each time when fragment pops from backstack)

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    Bundle arguments = getArguments(); 
}

edited Sep 01 '22 at 13:39

answered Aug 21 '12 at 08:14

ashakirov

12,112
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12

It is returning null in my case, any idea why this is happening ? – Anirudh Apr 01 '13 at 10:09
2

You're putting **ArrayList** into the bundle, but getting a String Array. You should do `bundle.getStringArrayList("elist");` – Rafał Oct 14 '14 at 10:18
1

You forgot the return statement: `return super.onCreateView(inflater, container, savedInstanceState);` – user41805 Jan 01 '16 at 18:29
4

Oncreateview calling all the time. So simply call getarguments in oncreate() method. It will call only when the fragment is destroyed or newly created time. – Mohamed Ibrahim Jan 29 '16 at 03:54
5

@almaz_from_kazan @HabeebPerwad Why are you using `getArguments()` in `onCreateView`, not in `onCreate`? – Nik Kober May 23 '16 at 10:35

score 43 · Answer 2 · answered Dec 10 '15 at 10:14

Eg: Add data:-

   Bundle bundle = new Bundle();
   bundle.putString("latitude", latitude);
   bundle.putString("longitude", longitude);
   bundle.putString("board_id", board_id);
   MapFragment mapFragment = new MapFragment();
   mapFragment.setArguments(bundle);

Eg: Get data :-

String latitude =  getArguments().getString("latitude")

score 27 · Accepted Answer · edited Feb 08 '17 at 05:51

27

You have a method called getArguments() that belongs to Fragment class.

edited Feb 08 '17 at 05:51

Vasily Kabunov

6,511
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answered Mar 24 '11 at 22:07

codeScriber

4,582
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score 8 · Answer 4 · edited Dec 11 '19 at 09:27

8

in Frag1:

Bundle b = new Bundle();

b.putStringArray("arrayname that use to retrive in frag2",StringArrayObject);

Frag2.setArguments(b);

in Frag2:

Bundle b = getArguments();

String[] stringArray = b.getStringArray("arrayname that passed in frag1");

It's that simple.

edited Dec 11 '19 at 09:27

Manaus

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answered Mar 27 '17 at 06:06

Siva krishna

187
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Rohit Singh · Answer 5 · 2019-01-04T04:05:27.853

Instantiating the Fragment the correct way!

getArguments() setArguments() methods seem very useful when it comes to instantiating a Fragment using a static method.
ie Myfragment.createInstance(String msg)

How to do it?

Fragment code

public MyFragment extends Fragment {

    private String displayMsg;
    private TextView text;

    public static MyFragment createInstance(String displayMsg)
    {
        MyFragment fragment = new MyFragment();
        Bundle args = new Bundle();
        args.setString("KEY",displayMsg);
        fragment.setArguments(args);           //set
        return fragment;
    }

    @Override
    public void onCreate(Bundle bundle)
    {
        displayMsg = getArguments().getString("KEY"):    // get 
    }

    @Override
    public View onCreateView(LayoutInlater inflater, ViewGroup parent, Bundle bundle){
        View view = inflater.inflate(R.id.placeholder,parent,false);
        text = (TextView)view.findViewById(R.id.myTextView);
        text.setText(displayMsg)    // show msg
        returm view;
   }

}

Let's say you want to pass a String while creating an Instance. This is how you will do it.

MyFragment.createInstance("This String will be shown in textView");

That's a wrong way. If a fragment recreates, it will lose those parameters. Parameters sent to the fragment should be serializable, passed through `setArguments()`. Nonserializable parameters can be set with setter, but it should again be called on activity/fragment recreate. – CoolMind Oct 06 '18 at 19:26

score 0 · Answer 7 · answered Jan 15 '21 at 08:05

If you are using navigation components and navigation graph create a bundle like this

val bundle = bundleOf(KEY to VALUE) // or whatever you would like to create the bundle

then when navigating to the other fragment use this:

findNavController().navigate(
        R.id.action_navigate_from_frag1_to_frag2,
        bundle
    )

and when you land the destination fragment u can access that bundle using

Bundle b = getArguments()// in Java

or

val b = arguments// in kotlin

How to use setArguments() and getArguments() methods in Fragments?

Frag1

7 Answers7

Instantiating the Fragment the correct way!

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