单击回收器视图将数据传递到相同的片段

Question

I am trying to Load data to a Recycler view. I have Fragment A with Recycler View and back button, My Fragment contains Group of users List. When I click on one User Card it should open the same fragment with different set of data. Hear I am capturing User_id and pass it to same Fragment, based on that User id my fragment will load data, but when I click back its should go to previous set of data. Below is my code

My Adapter

public class DirectLeftTeamAdapter extends RecyclerView.Adapter<DirectLeftTeamAdapter.MyViewHolder> {

    Context context;
    ArrayList<TeamModal> teamList;
    onItemClickListner onItemClickListner;

    public DirectLeftTeamAdapter(Context context, ArrayList<TeamModal> teamList) {
        this.context=context;
        this.teamList=teamList;
    }

    @NonNull
    @Override
    public MyViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {

        View view = LayoutInflater.from(parent.getContext())
                .inflate(R.layout.leftteamcard,parent,false);

        return new MyViewHolder(view,context,teamList);
    }

    public void setOnItemClickListner(DirectLeftTeamAdapter.onItemClickListner onItemClickListner) {
        this.onItemClickListner = onItemClickListner;
    }

    public interface onItemClickListner{
        void onClick(String str);//pass your object types.
    }

    @Override
    public void onBindViewHolder(@NonNull MyViewHolder holder, int position) {
        final TeamModal teamModal= teamList.get(position);

        holder.memname.setText(teamModal.getName());
        holder.memjoining.setText("Doj: "+teamModal.getDoj());
        holder.earnings.setText("Earnings: $"+(teamModal.getEarnings()));
        holder.totalmemcount.setText("Team: "+(teamModal.getTeamcount()));

        String Membertype;

        if(teamModal.getMembertype().equals("1")){
            Membertype="Product";
            holder.memcard.setCardBackgroundColor(Color.parseColor("#00FF7F"));
        }else{
            Membertype="Free Member";
            holder.memcard.setCardBackgroundColor(Color.parseColor("#FFB6C1"));
        }

        holder.memtype.setText("Member: "+Membertype);
        holder.memrank.setText("Rank: "+teamModal.getRank());
        holder.phonenumber.setText("Mobile: "+teamModal.getPhone());
        holder.userid.setText("User ID:"+teamModal.getUserid());
    }



    @Override
    public int getItemCount() {
        return teamList.size();
    }

    public class MyViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
        Context context;
        ArrayList<TeamModal> teamList;


        TextView memname,memjoining,totalmemcount,memtype,memrank,phonenumber,earnings,userid;
        CardView memcard;
        public MyViewHolder(@NonNull View itemView, Context context, ArrayList<TeamModal> teamList) {
            super(itemView);

            this.context=context;
            this.teamList=teamList;
            itemView.setOnClickListener(this);

            memname= itemView.findViewById(R.id.memerbame);
            memjoining= itemView.findViewById(R.id.dateofjoining);
            totalmemcount= itemView.findViewById(R.id.teamcount);
            memtype= itemView.findViewById(R.id.membertype);
            memrank= itemView.findViewById(R.id.memrank);
            phonenumber=itemView.findViewById(R.id.phone_number);
            earnings=itemView.findViewById(R.id.totalearnings);
            userid=itemView.findViewById(R.id.teamuserid);
            memcard=itemView.findViewById(R.id.membercard);
        }

        @Override
        public void onClick(View v) {
            int pos = getAdapterPosition();
            TeamModal teamModal =this.teamList.get(pos);

                onItemClickListner.onClick(teamModal.getUserid());


      }
    }
}

and my Fragment

public class DirectTeamLeftFragment extends Fragment {

    DirectLeftTeamAdapter directLeftTeamAdapter;
    ArrayList<TeamModal> LeftTeamList;
    RecyclerView recyclerView;
    GridLayoutManager mlayoutmanager;

    Session session;
    Apiinterface apiinterface;
    String Userid,Token;
    Button backbtn,loadmorebtn;

    String nuserid="111";


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


        recyclerView = root.findViewById(R.id.directleftteam);
        session=new Session(getContext());

        Userid=session.getUserDetails().get(Session.KEY_USERID);
        Token = session.gettoken().get(Session.KEY_TOKEN);
        backbtn = root.findViewById(R.id.backbutton);
        loadmorebtn=root.findViewById(R.id.loadmorebtn);

        nuserid = getArguments().getString("nuserid");


        LeftTeamList = new ArrayList<TeamModal>();
        directLeftTeamAdapter = new DirectLeftTeamAdapter(getContext(),LeftTeamList);

        mlayoutmanager= new GridLayoutManager(getContext(),1);
        recyclerView.setLayoutManager(mlayoutmanager);
        recyclerView.addItemDecoration(new DirectTeamLeftFragment.GridSpacingItemDecoration(1, dpToPx(10), true));
        recyclerView.setItemAnimator(new DefaultItemAnimator());
        recyclerView.setAdapter(directLeftTeamAdapter);
        directLeftTeamAdapter.setOnItemClickListner(new DirectLeftTeamAdapter.onItemClickListner() {
            @Override
            public void onClick(String newuserid) {
               // Toast.makeText(getContext(), newuserid, Toast.LENGTH_LONG).show();

               // LeftTeamList.clear();
//                directLeftTeamAdapter.notifyDataSetChanged();

               // getLeftDirectTeamList(Userid,Token,newuserid);
                DirectTeamLeftFragment directTeamLeftFragment = new DirectTeamLeftFragment();

                Bundle bundle = new Bundle();
                bundle.putString("nuserid",newuserid);
                directTeamLeftFragment.setArguments(bundle);
                getActivity().getSupportFragmentManager()
                        .beginTransaction()
                        .replace(R.id.content_frame,directTeamLeftFragment)
                        .commit();
            }
        });


//        recyclerView.addOnScrollListener(new RecyclerView.OnScrollListener() {
//            @Override
//            public void onScrollStateChanged(@NonNull RecyclerView recyclerView, int newState) {
//                super.onScrollStateChanged(recyclerView, newState);
//
//                if(!recyclerView.canScrollVertically(1) && newState==RecyclerView.SCROLL_STATE_IDLE){
//                    Toast.makeText(getContext(), "Last", Toast.LENGTH_SHORT).show();
//
//                }
//            }
//        });


        getLeftDirectTeamList(Userid, Token, nuserid);

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

                //getChildFragmentManager().popBackStack();
                getActivity().getFragmentManager().popBackStack();
            }

        });


        return root;
    }




    private void getLeftDirectTeamList(String userid, String token, String newuserid) {


        final KProgressHUD progressDialog = KProgressHUD.create(requireContext())
                .setStyle(KProgressHUD.Style.SPIN_INDETERMINATE)
                .setLabel("Please wait")
                .setCancellable(false)
                .setAnimationSpeed(2)
                .setDimAmount(0.5f)
                .show();

        JsonObject jsonObject = new JsonObject();
        jsonObject.addProperty("userid",userid);
        jsonObject.addProperty("token",token);
        jsonObject.addProperty("newuserid",newuserid);

        HttpLoggingInterceptor loggingInterceptor = new HttpLoggingInterceptor();
        loggingInterceptor.setLevel(HttpLoggingInterceptor.Level.BODY);

        OkHttpClient okHttpClient = new OkHttpClient.Builder()
                .connectTimeout(2, TimeUnit.MINUTES)
                .writeTimeout(2, TimeUnit.MINUTES)
                .readTimeout(2, TimeUnit.MINUTES)
                .addInterceptor(loggingInterceptor)
                .build();


        Retrofit retrofit = new Retrofit.Builder()
                .baseUrl(Settings.REG_SERVER_URL)
                .addConverterFactory(GsonConverterFactory.create())
                .client(okHttpClient).build();

        apiinterface = retrofit.create(Apiinterface.class);

        Call<ArrayList<TeamModal>> call = apiinterface.performgetTeam(jsonObject);
        call.enqueue(new Callback<ArrayList<TeamModal>>() {
            @Override
            public void onResponse(@NotNull Call<ArrayList<TeamModal>> call, @NotNull Response<ArrayList<TeamModal>> response) {
                progressDialog.dismiss();
                if(response.body()!=null){
                    ArrayList<TeamModal> teamModals = response.body();

                    for(TeamModal tmlist: teamModals){

                        TeamModal teamModal = new TeamModal(tmlist.getName(),
                                tmlist.getUserid(),tmlist.getPhone(),tmlist.getSponsor(),tmlist.getDoj(),tmlist.getRank(),
                                tmlist.getMembertype(),tmlist.getEarnings(),tmlist.getTeamcount());

                        LeftTeamList.add(teamModal);
                    }
                    directLeftTeamAdapter.notifyDataSetChanged();
                }
            }

            @Override
            public void onFailure(@NotNull Call<ArrayList<TeamModal>> call, Throwable t) {
                progressDialog.dismiss();
                Toast.makeText(getContext(),"Not Found", Toast.LENGTH_SHORT).show();
            }
        });
    }

    public class GridSpacingItemDecoration extends RecyclerView.ItemDecoration {

        private int spanCount;
        private int spacing;
        private boolean includeEdge;

        public GridSpacingItemDecoration(int spanCount, int spacing, boolean includeEdge) {
            this.spanCount = spanCount;
            this.spacing = spacing;
            this.includeEdge = includeEdge;
        }

        @Override
        public void getItemOffsets(Rect outRect, View view, RecyclerView parent, RecyclerView.State state) {
            int position = parent.getChildAdapterPosition(view); // item position
            int column = position % spanCount; // item column

            if (includeEdge) {
                outRect.left = spacing - column * spacing / spanCount; // spacing - column * ((1f / spanCount) * spacing)
                outRect.right = (column + 1) * spacing / spanCount; // (column + 1) * ((1f / spanCount) * spacing)

                if (position < spanCount) { // top edge
                    outRect.top = spacing;
                }
                outRect.bottom = spacing; // item bottom
            } else {
                outRect.left = column * spacing / spanCount; // column * ((1f / spanCount) * spacing)
                outRect.right = spacing - (column + 1) * spacing / spanCount; // spacing - (column + 1) * ((1f /    spanCount) * spacing)
                if (position >= spanCount) {
                    outRect.top = spacing; // item top
                }
            }
        }
    }

    /**
     * Converting dp to pixel
     */
    private int dpToPx(int dp) {
        Resources r = getResources();
        return Math.round(TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, dp, r.getDisplayMetrics()));
    }

    @Override
    public void onDetach() {
        super.onDetach();
        getLeftDirectTeamList(Userid, Token,nuserid);
    }


}

for better understand please see below image. on this image when I click on fist card it should load child data of first card and go on. when I click back it should come back to previous view

I hope you understand, if you need any clarification please comment

Answer 1

instead replace the fragment just call network call with userid..and maintain arraylist for clicked userid..once click back button load data by calling network..and delete userid from list