how to pass data from activity to fragment..?

Question

Hello everyone i need help in passing data from activity to fragment.

im using the this way but getting error of null pointer .

In main Activity

 @Override
    public void onClick(View v) {
        switch (v.getId()) {
            case R.id.leftfeedback:
                handleChanges();
                break;
        }
    }

   private void handleChanges() {

                FeedBackFragment feedBackFragment =new FeedBackFragment();
                if (feedBackFragment != null) {
                   feedBackFragment.fragmentCommunication(ExtraData);
                } else {
                    Log.i(TAG, "Fragment 2 is not initialized");
                }
    }

in fragment side all given data is coming i checked with log before to set on

   public class FeedBackFragment extends Fragment{

    private static final String TAG ="FeedBackFragment" ;

    View view;

    TextView feedbackEditText;

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {

        view = inflater.inflate(R.layout.feedback_fragemnt, container, false);

        feedbackEditText = (TextView) view.findViewById(R.id.feedbackEditText);


        return view;
    }

    public void fragmentCommunication(String feedBackData) {

    log.i(TAG,feedBackData);
        try {

            JSONObject jsonObject = new JSONObject(feedBackData);

            String message = jsonObject.getString("message");
            if(message.trim()!=null){

            feedbackEditText.setText(message);

             }
           } catch (JSONException e) {
            e.printStackTrace();
        }

    }

}

Answer 1

Because of feedBackFragment not create, so Edittext is null

you should attach your feedBackFragment to MainActivity.

 FeedBackFragment feedBackFragment;
    @Override
    public void onClick(View v) {
        switch (v.getId()) {
            case R.id.leftfeedback:
                handleChanges();
                break;
        }
    }

    private void handleChanges() {

        if (null == feedBackFragment) {
            feedBackFragment = new FeedBackFragment();
            FragmentTransaction transaction = getSupportFragmentManager().beginTransaction();
            transaction.add(contentId, feedBackFragment);
            transaction.commit();
        }
        feedBackFragment.fragmentCommunication(ExtraData);
    }