I want to send an array of single object by clicking on the item of list from one fragment to another fragment but how ?

Question

write now I am toasting it.. but i want to send the data from one fragment to another fragment and then update the UI there.. how can I do that?

ArrayAdapter<String> adapter=new ArrayAdapter<String>(getActivity(),android.R.layout.simple_list_item_1, dp.getDaysOfMonth()); mListView.setAdapter(adapter);

    mListView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
        @Override
        public void onItemClick(AdapterView<?> parent, View view, int position, long id) {


            String thisDate=mDailyPrayer[position].getDate();
            String SunRise=mDailyPrayer[position].getSunRise();
            String Fajr=mDailyPrayer[position].getFajrBegins();
            String message=String.format("%s -------  %s ------ %s", thisDate,SunRise,Fajr);

            Toast.makeText(getActivity(),message,Toast.LENGTH_LONG).show();
        }
    });

Answer 1 · 2017-02-18T18:49:46Z

February 18, 2017 6:49pm

Thanks for the feedback :). The reason why it is returning null when you rotate is because of the releaseRefList() method call in the onStop() method. When you rotate the screen, the activity/fragment gets destroyed and then recreated. So the onStop() method is called as a result, and in there the releaseRefList() method is called also to remove the object from the ReferenceMap. The ReferenceMap is supposed to work like how you pass Strings/primitive objects between activities; so if you want to keep the object even after it is rotated, the best solution will be to save the variables you need in your onSaveInstance() method. This guide does a good job of explaining how to do this (http://code.hootsuite.com/orientation-changes-on-android/). However, if that won't work well for you, then the best thing to do is to make the object Parcelable instead. Hope this helps :)

Answer 2 · 2017-01-17T12:10:54Z

January 17, 2017 12:10pm

There's two ways you could do this, depending how you want to use the items in the mDailyPrayer object in the next fragment:

The recommended approach is to make the associated activity handle communication between both Fragments. So you will need to create an interface in your first fragment (Fragment A). Then in your Activity you will have to implement that interface to pass the data in mDailyPrayer to your second fragment. Please take a look at this tutorial link to find out how to do that [https://developer.android.com/training/basics/fragments/communicating.html]. Also, this link on codepath will be helpful as well [https://guides.codepath.com/android/Creating-and-Using-Fragments#communicating-with-fragments]
I created a small utility class that provides a simple alternative to the first option [https://gist.github.com/kkuivi/161f254374a4007ae6014f67ae45789e]. It acts pretty much the same way as passing data between Intents. All you will need to do is give a key to the data you wish to send, and provide the name of the Fragment you want to send it to.

In Fragment A (Send Object to Fragment B):

ReferenceMap.getInstance().putObjectReference(FragmentB.class, "myKey", mDailyPrayer[position])

In Fragment B (Receive Object to Fragment A):

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        ...  
       ReferenceMap.ReferenceList refList = ReferenceMap.getInstance().getReferenceList(this);
       if(refList != null) {
          DailyPrayer prayer = (DailyPrayer) refList.get("myKey");
       }
       ....
}

@Override
public void onStop(){
     ReferenceMap.getInstance().releaseRefList(this);
     super.onStop();
}

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Khurram Shahzad

Khurram Shahzad

I want to send an array of single object by clicking on the item of list from one fragment to another fragment but how ?

2 Answers

Elikem Kuivi

Elikem Kuivi

Elikem Kuivi

Elikem Kuivi

Khurram Shahzad

Khurram Shahzad