how can pass data between fragment to adapter

Question

see all post about this and understand in all cases people explain about pass data from adapter to fragment with interface and i use that but my question is how can pass data from fragment to adapter ? and how can pass value of data from those?

this is my adapter :

public class DataAdapter extends RecyclerView.Adapter<DataAdapter.ViewHolder> {
    private Context context;
    List<jsonContent> jcontent;
    private AdapterCallback callback;
    private String etpass;


    public DataAdapter(Context context, List<jsonContent> jcontent, AdapterCallback callback) {

        this.context=context;
        this.jcontent=jcontent;
        this.callback=callback;

    }

    @Override
    public DataAdapter.ViewHolder onCreateViewHolder(ViewGroup viewGroup, int i) {

       View view ;
        if(i == R.layout.card_row) {
            view = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.card_row, viewGroup, false);
        }else {
            view = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.button_card, viewGroup, false);
        }
        return new ViewHolder(view);
    }

    @Override
    public void onBindViewHolder(final ViewHolder viewHolder, final int i) {

        if(i == jcontent.size()) {

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

                    jcontent.removeAll(jcontent);
                    callback.MethodCallbacknext();

                }
            });
            viewHolder.buttonprev.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {

                    jcontent.removeAll(jcontent);
                    callback.MethodCallbackprev();

                }
            });
            viewHolder.go.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {

                    etpass=String.valueOf(viewHolder.editText.getText());
                    maghalat f1 = new maghalat ();
                    Bundle args1 = new Bundle();
                    args1.putString("sag",etpass);
                    f1.setArguments(args1);
                    callback.MethodCallbackgo();
                }
            });

            viewHolder.cardView.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {

                }
            });

            viewHolder.pages.setText(Integer.toString(jcontent.get(i - 1).pages));


        }
        else {
            viewHolder.title.setText(jcontent.get(i).title);
            viewHolder.title.setTypeface(viewHolder.title.getTypeface(), Typeface.BOLD);
            Picasso.with(context).load(jcontent.get(i).imgurl).resize(300, 400).into(viewHolder.imageView);
        }
    }
    @Override
    public int getItemCount() {
            return jcontent.size()+1;
    }

    @Override
    public int getItemViewType(int position) {
        return (position == jcontent.size()) ? R.layout.button_card : R.layout.card_row;
    }


    public class ViewHolder extends RecyclerView.ViewHolder{

        private TextView title,pages,current;

        private ImageView imageView;

        private Button buttonnext,buttonprev,go;

        private CardView cardView;

        private EditText editText;



        public ViewHolder(final View view) {
            super(view);



           title = (TextView)view.findViewById(R.id.post_title);
            imageView=(ImageView)view.findViewById(R.id.img);

            buttonnext =(Button)view.findViewById(R.id.next);
            buttonprev=(Button)view.findViewById(R.id.prev);
            go=(Button)view.findViewById(R.id.go);

            editText=(EditText)view.findViewById(R.id.et_go_page);

            cardView=(CardView)view.findViewById(R.id.cvv);

            pages=(TextView)view.findViewById(R.id.number_pages);
            current=(TextView)view.findViewById(R.id.current);
}
}
}

this is my interface :

public interface AdapterCallback {
    void MethodCallbackgo();
    void MethodCallbacknext();
    void MethodCallbackprev();
}

and this is my fragment :

public class maghalat extends Fragment {

    private View myFragmentView;
    private RecyclerView recyclerView;
    private DataAdapter adapter;
    private String TAG = MainActivity.class.getSimpleName();
    private ProgressDialog pDialog;
    List<jsonContent> listcontent=new ArrayList<>();

    public int dog=1;
    public String url = "http://memaraneha.ir/category/%d9%85%d9%82%d8%a7%d9%84%d8%a7%d8%aa/page/"+String.valueOf(dog)+"/?json=get_posts";



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


        if(isNetworkConnected()) {
            asyncRun();
        }else
        {
            Toast.makeText(getActivity().getApplicationContext(), "دستگاه شما به اینترنت متصل نیست!", Toast.LENGTH_LONG).show();
        }
        return myFragmentView;
    }
    public void asyncRun(){
       new GetContacts().execute();
    }
    public class GetContacts extends AsyncTask<Void, Void, Void> {

        @Override
        protected void onPreExecute() {
            super.onPreExecute();
            // Showing progress dialog
            pDialog = new ProgressDialog(getActivity());
            pDialog.setMessage("Please wait...");
            pDialog.setCancelable(false);
            pDialog.show();
        }

        @Override
        protected Void doInBackground(Void... arg0) {

            HttpHandler sh = new HttpHandler();


            // Making a request to url and getting response
            String jsonStr = sh.makeServiceCall(url);


            Log.e(TAG, "Response from url: " + jsonStr);

            if (jsonStr != null) {
                try {

                    JSONObject jsonObj = new JSONObject(jsonStr);


                    int id=jsonObj.getInt("pages");


                    JSONArray posts = jsonObj.getJSONArray("posts");
                    for (int i = 0; i < posts.length(); i++) {
                        JSONObject c = posts.getJSONObject(i);

                        jsonContent jsonContent=new jsonContent();

                        jsonContent.title=c.getString("title");

                        //img
                        JSONObject post_img=c.getJSONObject("thumbnail_images");
                        for (int j=0;j<post_img.length();j++)
                        {
                            JSONObject v=post_img.getJSONObject("mom-portfolio-two");
                            jsonContent.imgurl=v.getString("url");
                        }
                        jsonContent.pages=id;
                        listcontent.add(jsonContent);

                    }

                } catch (final JSONException e) {
                    Log.e(TAG, "Json parsing error: " + e.getMessage());
                    getActivity().runOnUiThread(new Runnable() {
                        @Override
                        public void run() {
                            Toast.makeText(getActivity().getApplicationContext(),
                                    "Json parsing error: " + e.getMessage(),
                                    Toast.LENGTH_LONG)
                                    .show();
                        }
                    });
                }
            } else {
                Log.e(TAG, "Couldn't get json from server.");
                getActivity().runOnUiThread(new Runnable() {
                    @Override
                    public void run() {
                        Toast.makeText(getActivity().getApplicationContext(),
                                "Couldn't get json from server. Check LogCat for possible errors!",
                                Toast.LENGTH_LONG)
                                .show();
                    }
                });
            }
            return null;
        }

        @Override
        protected void onPostExecute(Void result) {
            super.onPostExecute(result);

            pDialog.dismiss();
            recyclerView=(RecyclerView)myFragmentView.findViewById(R.id.recycler_view);
            recyclerView.setHasFixedSize(true);
            RecyclerView.LayoutManager layoutManager = new LinearLayoutManager(getActivity().getApplicationContext());
            recyclerView.setLayoutManager(layoutManager);

            adapter=new DataAdapter(getActivity(), listcontent, new AdapterCallback() {
                @Override
                public void MethodCallbackgo() {
                    String gg;
                    Bundle extras = getArguments();
                    gg = extras.getString("sag");
                    dog= Integer.parseInt(gg);
                    url = "http://memaraneha.ir/category/%d9%85%d9%82%d8%a7%d9%84%d8%a7%d8%aa/page/"+String.valueOf(dog)+"/?json=get_posts";
                    new GetContacts().execute();
                }

                @Override
                public void MethodCallbacknext() {
                    dog+=1;
                    url = "http://memaraneha.ir/category/%d9%85%d9%82%d8%a7%d9%84%d8%a7%d8%aa/page/"+String.valueOf(dog)+"/?json=get_posts";
                    new GetContacts().execute();
                }

                @Override
                public void MethodCallbackprev() {
                    if (dog!=1)
                    {
                        dog-=1;
                        url = "http://memaraneha.ir/category/%d9%85%d9%82%d8%a7%d9%84%d8%a7%d8%aa/page/"+String.valueOf(dog)+"/?json=get_posts";
                        new GetContacts().execute();
                    }else{
                        Toast.makeText(getActivity().getApplicationContext(),"این اولین صفحه است",Toast.LENGTH_SHORT).show();
                    }
                }
            });

            recyclerView.setAdapter(adapter);
        }
    }



    private boolean isNetworkConnected() {
        ConnectivityManager cm = (ConnectivityManager) getActivity().getSystemService(Context.CONNECTIVITY_SERVICE);
        NetworkInfo ni = cm.getActiveNetworkInfo();
        if (ni == null) {
            // There are no active networks.
            return false;
        } else
            return true;
    }
   }

want inside adapter in go.setOnClickListener get edit text value and pass it to fragment in public void MethodCallbackgo() { but didnt work . and another question is how can send dog variable value inside fragment to adapter ?

Answer 1

If it understood correctly, you want to pass data from the callback method call to the interface implementation.

Use parameters

void MethodCallbackgo(String data);

Pass it back

etpass=String.valueOf(viewHolder.editText.getText());
callback.MethodCallbackgo(etpass);

Also: suggestion rewrite the AsyncTask to take a URL as a parameter. The URL does not need to be a member variable of your Fragment

 @Override
public void MethodCallbackgo(String data) {
    // here you have data 
    //use it ...
    new GetContacts().execute(url); // pass url here, for example 
}

---

This does nothing but create a brand new Fragment which is never displayed

maghalat f1 = new maghalat ();
Bundle args1 = new Bundle();
args1.putString("sag",etpass);
f1.setArguments(args1);

---

Personally, I don't think the adapter should control the page number, though. The Fragment (or just some other class) should contain the previous/next/go button actions and update the adapter accordingly. You've given" too much responsibility" to a class that's only purpose is to display data within a list.

Answer 2

Declare this in your adapter

private AdapterCallback mAdaptercallback;

Create one method in adapter

public void setAdapterCallback(AdapterCallback  adaptercallback){
    this.mAdaptercallback = adaptercallback;
}

In your fragment do like this

    adapter.setAdapterCallback(new DataAdapter.AdapterCallback() {


          @Override
            public void MethodCallbackgo() {
                String gg;
                Bundle extras = getArguments();
                gg = extras.getString("sag");
                dog= Integer.parseInt(gg);
                url = "http://memaraneha.ir/category/%d9%85%d9%82%d8%a7%d9%84%d8%a7%d8%aa/page/"+String.valueOf(dog)+"/?json=get_posts";
                new GetContacts().execute();
            }

            @Override
            public void MethodCallbacknext() {
                dog+=1;
                url = "http://memaraneha.ir/category/%d9%85%d9%82%d8%a7%d9%84%d8%a7%d8%aa/page/"+String.valueOf(dog)+"/?json=get_posts";
                new GetContacts().execute();
            }

            @Override
            public void MethodCallbackprev() {
                if (dog!=1)
                {
                    dog-=1;
                    url = "http://memaraneha.ir/category/%d9%85%d9%82%d8%a7%d9%84%d8%a7%d8%aa/page/"+String.valueOf(dog)+"/?json=get_posts";
                    new GetContacts().execute();
                }else{
                    Toast.makeText(getActivity().getApplicationContext(),"این اولین صفحه است",Toast.LENGTH_SHORT).show();
                }
            }
        });

I hope this will solve your problem