How do I update the particular list item in RecyclerView

[Debdeep Ganguly]

Here is my EditListItemsFragment.java which supports a separate fragment to edit the list items

 @Override
    public View onCreateView(final LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.fragment_edit_list_item, container, false);
        mUnbinder = ButterKnife.bind(this, view);

        // Retrieving Bundle contents
        mBundle = getArguments();

        if (mBundle != null) {

//            Log.d(TAG, mBundle.toString());

            mInformation = mBundle.getParcelable("Information");

//            Log.d(TAG, mInformation.name.toString());
            fullNameEdit.setText(mInformation.name.toString(), TextView.BufferType.EDITABLE);
            descriptionEdit.setText(mInformation.description.toString(), TextView.BufferType.EDITABLE);
            dobEdit.setText(mInformation.dateOfBirth.toString(), TextView.BufferType.EDITABLE);
            genderEdit.setText(mInformation.gender.toString(), TextView.BufferType.EDITABLE);

        } else  {
            Toast.makeText(getActivity(), "No data in bundle", Toast.LENGTH_SHORT).show();
        }

        refreshButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                String name = fullNameEdit.getText().toString();
                String description = descriptionEdit.getText().toString();
                String dob = dobEdit.getText().toString();
                String gender = genderEdit.getText().toString();

                Information information = new Information(name, description, dob, gender);

                // getting position of view clicked in DataListFragment setOnItemClick
                int position = mBundle.getInt("pos");

                updateListItem(information, position);
                getActivity().getSupportFragmentManager().popBackStack();
            }
        });



        return view;
    }

    private void updateListItem(Information information,int position) {


        mFragmentListAdapter.notifyItemChanged(position);
    }

Here's my DataListFragment.java containing the recyclerview list items

    @Override
    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.data_list_fragment, container, false);

        return view;
    }

        View.OnClickListener mOnClickListener=new View.OnClickListener() {
        @Override
        public void onClick(View view) {

            Information information = data.get((int)view.getTag());

            // Putting recycler view list items data into bundle here
            mBundle = new Bundle();
            mBundle.putParcelable("Information", information);
            mBundle.putInt("pos",(int) view.getTag());

            FragmentManager fragmentManager = getActivity().getSupportFragmentManager();
            fragmentManager.beginTransaction().replace(R.id.relative_layout_container,
                 EditListItemsFragment.instantiate(getActivity(),EditListItemsFragment.class.getName(),mBundle),
                    EditListItemsFragment.class.getName()).addToBackStack(EditListItemsFragment.class.getName()).commit();
    }
};


    private void setAdapter() {
        if (mFragmentListAdapter == null) {
            data = new ArrayList<>();
            mFragmentListAdapter = new FragmentListAdapter(getActivity(), data, mOnClickListener);

        } else {
            mFragmentListAdapter.notifyDataSetChanged();
        }

        mRecyclerView.setAdapter(mFragmentListAdapter);
    }


    @Override
    public void onViewCreated(View view, @Nullable Bundle savedInstanceState) {
        super.onViewCreated(view, savedInstanceState);

        mRecyclerView = (RecyclerView) view.findViewById(R.id.my_recycler_view);
        mRecyclerView.setLayoutManager(new LinearLayoutManager(getActivity()));

        floatingActionButton = (FloatingActionButton) view.findViewById(R.id.myFAB);


        floatingActionButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {


                FragmentManager fragmentManager = getActivity().getSupportFragmentManager();
                FragmentNewEntryPage fragmentNewEntryPage = new FragmentNewEntryPage();
                FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();


                fragmentTransaction.replace(R.id.relative_layout_container,
                        fragmentNewEntryPage, FragmentNewEntryPage.class.getName());
                fragmentTransaction.addToBackStack(DataListFragment.class.getName());
                fragmentTransaction.commit();
            }
        });
            setAdapter();
    }

About that updateListItem(), how to implement it ?

[Tim Moores]

What do you want to do that you can't do using the reference to the adapter, or by replacing the adapter with a new one based on the updated data?