Update RecyclerView List after adding a row and also set user entered values from that row to the recyclerview list

Question

I have a recyclerview that contains cardViews with edittext, datepicker & spinner. Each cardview has (+) button which can be used to add a new cardview to the recyclerview. The problem that i am facing is that i want to get values from all the cards available in recyclerview including the newly added card into an object type arraylist. For the time being i am able to add a new blank card but not able to catch user entered values from that card into list.

I want to save the above pink marked values into the recyclerview list so that i can save it to server using rest api.

EmpEducationInfoFormActivity.java

package abc.com.abcpos.forms;
import android.app.DatePickerDialog;
import android.app.Dialog;
import android.app.ProgressDialog;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.os.AsyncTask;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.widget.CardView;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.support.v7.widget.Toolbar;
import android.text.format.Time;
import android.view.LayoutInflater;
import android.view.MotionEvent;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.DatePicker;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.RelativeLayout;
import android.widget.Spinner;
import android.widget.TextView;
import android.widget.Toast;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.Date;
import java.util.List;
import abc.com.abcpos.Adapters.EducationInfoAdapter;
import abc.com.abcpos.Commons.NumericKeyBoardTransformationMethod;
import abc.com.abcpos.Commons.SavingUrls;
import abc.com.abcpos.Commons.Validations;
import abc.com.abcpos.Handlers.HttpHandler;
import abc.com.abcpos.MainActivity;
import abc.com.abcpos.Models.EmpEducationDetailsModel;
import abc.com.abcpos.Models.EmpPersonalDetails;
import abc.com.abcpos.R;
import abc.com.abcpos.WelcomeActivity;

public class EmpEducationInfoFormActivity extends AppCompatActivity {
    Toolbar toolbar;
    boolean connected=false;
    String jsonStr;
    NumericKeyBoardTransformationMethod numKeyBoard;
    EmpEducationDetailsModel empEducationDetailsModelObject;
    private ArrayList<EmpEducationDetailsModel.EmpEducationDetails> empEducationDetailsModelLists;
    private ArrayList<EmpEducationDetailsModel.EmpEducationDetails> saveEducationDetailsModelLists;
    private RecyclerView empEducationDetailsRecyclerView;
    private RecyclerView.Adapter empEducationDetailsAdapter;
    private RecyclerView.LayoutManager empEducationDetailsLayoutManager;
    Button saveBtn,cancelBtn;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_emp_education_info_form);
        initViews();
        initListeners();

        ConnectivityManager connectivityManager=(ConnectivityManager)getSystemService(Context.CONNECTIVITY_SERVICE);
        if(connectivityManager.getNetworkInfo(ConnectivityManager.TYPE_MOBILE).getState()== NetworkInfo.State.CONNECTED||
                connectivityManager.getNetworkInfo(ConnectivityManager.TYPE_WIFI).getState()==NetworkInfo.State.CONNECTED){
            connected=true;
        }else{
            connected=false;
        }

        new GetContacts().execute();
    }

    private void initViews(){
        toolbar=(Toolbar) findViewById(R.id.toolbarEmpEducationInfoFormActivity);
        toolbar.setTitle("Education Details");
        toolbar.setTitleTextColor(getResources().getColor(R.color.toolBarTitle));
        toolbar.setNavigationIcon(getResources().getDrawable(R.drawable.ic_arrow_back_black_24dp));
        setSupportActionBar(toolbar);

        saveBtn=(Button)findViewById(R.id.saveBtn);
        cancelBtn=(Button)findViewById(R.id.cancelBtn);

        numKeyBoard=new NumericKeyBoardTransformationMethod();

        empEducationDetailsModelLists=new ArrayList<EmpEducationDetailsModel.EmpEducationDetails>();

        empEducationDetailsRecyclerView=(RecyclerView)findViewById(R.id.recyclerView_EducationDetailsActivity);
        empEducationDetailsRecyclerView.setHasFixedSize(true);
    }

    private void initListeners(){

        toolbar.setNavigationOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent intent = new Intent(EmpEducationInfoFormActivity.this, WelcomeActivity.class);
                startActivity(intent);
            }
        });
        saveBtn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                try{
                    JSONObject jo1=new JSONObject();
                    JSONArray ja1=new JSONArray();
                    for(int j=0;j<saveEducationDetailsModelLists.size();j++){
                        try {
                            jo1.put("userId",empEducationDetailsModelLists.get(j).getUserId());
                            jo1.put("education",saveEducationDetailsModelLists.get(j).getEducation());
                            jo1.put("university",saveEducationDetailsModelLists.get(j).getUniversity());
                            jo1.put("marks",saveEducationDetailsModelLists.get(j).getMarks());
                            jo1.put("passingYear",saveEducationDetailsModelLists.get(j).getPassingYear());
                            jo1.put("stream",saveEducationDetailsModelLists.get(j).getStream());
                            jo1.put("grade",saveEducationDetailsModelLists.get(j).getGrade());

                            ja1.put(j,jo1);
                        }catch (Exception e){
                            e.printStackTrace();
                        }
                    }
                    Sender s = new Sender(EmpEducationInfoFormActivity.this, SavingUrls.sending_personal_det_url,ja1);
                    s.execute();
                }catch (Exception e){
                    e.printStackTrace();
                }
                //checkValidation();
                /*Intent i = new Intent(EmpEducationInfoFormActivity.this,MainActivity.class);
                SharedPreferences myPrefs = getSharedPreferences("submitFlags", Context.MODE_PRIVATE);
                SharedPreferences.Editor prefsEditor = myPrefs.edit();
                prefsEditor.putBoolean("educationInfoFlag", true);
                prefsEditor.commit();
                startActivity(i);*/
            }
        });
    }

    public void onItemSelected(AdapterView<?> parent, View v, int position, long id) {

        switch (position) {
            case 0:
                break;
            case 1:
                break;
            case 2:
                break;

        }
    }

    public void sendAllDataToServer(ArrayList<EmpEducationDetailsModel.EmpEducationDetails> mEmpEducationDetailsList) {
        saveEducationDetailsModelLists=mEmpEducationDetailsList;
    }


    private class GetContacts extends AsyncTask<Object, Object, ArrayList<EmpEducationDetailsModel.EmpEducationDetails>> {

        ProgressDialog dialog = new ProgressDialog(EmpEducationInfoFormActivity.this);

        @Override
        protected void onPreExecute() {
            dialog.setCanceledOnTouchOutside(false);
            dialog.setMessage("Loading...");
            dialog.show();
            super.onPreExecute();
        }

        @Override
        protected ArrayList<EmpEducationDetailsModel.EmpEducationDetails> doInBackground(Object... objects) {
            try{
                HttpHandler sh = new HttpHandler();
                String url = "http://202.38.173.190:8080/TelephoneDirectoryApi/getAllCategoryData";
                Date date = new Date();

                if (connected) {
                    /*jsonStr = sh.makeServiceCall(url);*/
                    jsonStr="[{\"userId\":\"kbg-000002\",\"education\":\"Graduation\",\"university\":\"sdsa\",\"marks\":\"321\",\"passingYear\":\"3232\"," +
                            "\"stream\":\"dsdsa\",\"grade\":\"d\",\"empEducationList\":null},{\"userId\":\"kbg-000002\",\"education\":\"Post Graduation\"," +
                            "\"university\":\"sdsa\",\"marks\":\"321\",\"passingYear\":\"3232\",\"stream\":\"dsdsa\",\"grade\":\"d\",\"empEducationList\":null}]";

                    if (jsonStr != null) {
                        try {
                            ArrayList<EmpEducationDetailsModel.EmpEducationDetails> empEducationList = new ArrayList<EmpEducationDetailsModel.EmpEducationDetails>();
                            JSONArray eduArray = new JSONArray(jsonStr);
                            for (int i = 0; i < eduArray.length(); i++) {
                                JSONObject jsonobject = eduArray.getJSONObject(i);
                                String userId = jsonobject.getString("userId");
                                String education = jsonobject.getString("education");
                                String university = jsonobject.getString("university");
                                String marks = jsonobject.getString("marks");
                                String passingYear = jsonobject.getString("passingYear");
                                String stream = jsonobject.getString("stream");
                                String grade = jsonobject.getString("grade");

                                empEducationList.add(new EmpEducationDetailsModel.EmpEducationDetails(userId,education,university,marks,passingYear,stream,grade));
                            }
                            empEducationDetailsModelLists.addAll(empEducationList);

                        }catch (JSONException e) {
                            e.printStackTrace();
                            return null;
                        }
                    }
                }else{
                    Toast.makeText(EmpEducationInfoFormActivity.this,
                            "Sorry! You are not connected to internet.", Toast.LENGTH_LONG).show();
                }
                return empEducationDetailsModelLists;
            }catch (Exception e) {
                e.printStackTrace();
                return null;
            }
        }

        @Override
        protected void onPostExecute(ArrayList<EmpEducationDetailsModel.EmpEducationDetails> empEducationDetails) {
            super.onPostExecute(empEducationDetails);
            if(dialog != null && dialog.isShowing()){
                dialog.dismiss();
            }

            empEducationDetailsAdapter=new EducationInfoAdapter(empEducationDetailsModelLists,EmpEducationInfoFormActivity.this);
            RecyclerView.LayoutManager layoutManager = new LinearLayoutManager(EmpEducationInfoFormActivity.this);
            empEducationDetailsRecyclerView.setLayoutManager(layoutManager);
            empEducationDetailsRecyclerView.setAdapter(empEducationDetailsAdapter);
        }
    }
    @Override
    protected void onResume() {
        super.onResume();
    }

    private class Sender extends AsyncTask<Void,Void,String>{
        Context c;
        String urlAddress;
        ProgressDialog pd = new ProgressDialog(EmpEducationInfoFormActivity.this);
        JSONArray jsonArray;

        public Sender(Context c, String urlAddress, JSONArray jsonArray) {
            this.c = c;
            this.urlAddress = urlAddress;
            this.jsonArray = jsonArray;
        }

        @Override
        protected void onPreExecute() {
            pd.setCanceledOnTouchOutside(false);
            pd.setMessage("Loading...");
            pd.show();
            super.onPreExecute();
        }

        @Override
        protected String doInBackground(Void... voids) {
            return this.send();
        }

        private String send() {
            try {

                URL url = new URL(SavingUrls.sending_edu_det_url);
                HttpURLConnection conn = (HttpURLConnection) url.openConnection();
                conn.setDoOutput(true);
                conn.setRequestMethod("POST");
                conn.setRequestProperty("Content-Type", "application/json");

                String input = jsonArray.toString() ;

                OutputStream os = conn.getOutputStream();
                os.write(input.getBytes());
                os.flush();

                if (conn.getResponseCode() != HttpURLConnection.HTTP_CREATED) {
                    throw new RuntimeException("Failed : HTTP error code : "
                            + conn.getResponseCode());
                }

                BufferedReader br = new BufferedReader(new InputStreamReader(
                        (conn.getInputStream())));

                String output;
                System.out.println("Output from Server .... \n");
                while ((output = br.readLine()) != null) {
                    System.out.println(output);
                }

                conn.disconnect();

            } catch (MalformedURLException e) {

                e.printStackTrace();

            } catch (IOException e) {

                e.printStackTrace();

            } catch (Exception e){
                e.printStackTrace();
            }
            return null;
        }

        @Override
        protected void onPostExecute(String s) {
            super.onPostExecute(s);
            pd.dismiss();

            if (s != null) {
                Toast.makeText(c, s, Toast.LENGTH_LONG).show();

            } else {
                Toast.makeText(c, "Unsuccessful " + s, Toast.LENGTH_LONG).show();
            }
        }
    }
}

EducationInfoAdapter.java

package abc.com.abcpos.Adapters;
import android.app.Activity;
import android.app.DatePickerDialog;
import android.content.Context;
import android.support.annotation.NonNull;
import android.support.design.widget.TextInputLayout;
import android.support.v7.widget.RecyclerView;
import android.text.Editable;
import android.text.TextWatcher;
import android.text.format.Time;
import android.view.LayoutInflater;
import android.view.MotionEvent;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.DatePicker;
import android.widget.EditText;
import android.widget.Spinner;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.List;
import abc.com.abcpos.Commons.NumericKeyBoardTransformationMethod;
import abc.com.abcpos.Commons.Validations;
import abc.com.abcpos.Models.EmpEducationDetailsModel;
import abc.com.abcpos.R;
import abc.com.abcpos.forms.EmpEducationInfoFormActivity;

public class EducationInfoAdapter extends RecyclerView.Adapter<EducationInfoAdapter.EducationViewHolder>{

    private ArrayList<EmpEducationDetailsModel.EmpEducationDetails> mEmpEducationDetailsList;
    Context ctx;

    Validations validationsObj =new Validations();

    public EducationInfoAdapter(ArrayList<EmpEducationDetailsModel.EmpEducationDetails> mEmpEducationDetailsList,Context ctx) {
        this.ctx = ctx;
        this.mEmpEducationDetailsList = mEmpEducationDetailsList;
        }

    public void addItem(){
        mEmpEducationDetailsList.add(new EmpEducationDetailsModel.EmpEducationDetails());
        notifyItemInserted(mEmpEducationDetailsList.size() - 1);
    }

    @NonNull
    @Override
    public EducationInfoAdapter.EducationViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
        View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.row_educationinfo, parent, false);
        return new EducationViewHolder(v);
    }

    @Override
    public void onBindViewHolder(@NonNull final EducationInfoAdapter.EducationViewHolder holder, final int position) {
        try{
            holder.nameOfBoardEditText.setText(mEmpEducationDetailsList.get(position).getUniversity());
            holder.marksObtained.setText(mEmpEducationDetailsList.get(position).getMarks());
            holder.stream.setText(mEmpEducationDetailsList.get(position).getStream());
            holder.grade.setText(mEmpEducationDetailsList.get(position).getGrade());
            holder.passingYear.setText(mEmpEducationDetailsList.get(position).getPassingYear());
            if (mEmpEducationDetailsList.get(position).getEducation().toString() != null) {
                int spinnerPosition = holder.adapter.getPosition(mEmpEducationDetailsList.get(position).getEducation().toString());
                holder.educationSpinner.setSelection(spinnerPosition);
            }

            if(ctx instanceof EmpEducationInfoFormActivity){
                ((EmpEducationInfoFormActivity)ctx).sendAllDataToServer(this.mEmpEducationDetailsList);
            }
        }catch (Exception e){
            e.printStackTrace();
        }
    }

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

    @Override
    public int getItemViewType(int position) {
        return position;
    }

    public List<EmpEducationDetailsModel.EmpEducationDetails> retrieveEduData()
    {
        return mEmpEducationDetailsList;
    }

    public class EducationViewHolder extends RecyclerView.ViewHolder {

        EditText passingYear,marksObtained,stream,grade,nameOfBoardEditText;
        Spinner educationSpinner;
        String[]paths = {"Select Education", "Matriculation", "Higher Secondary", "Graduation","Post Graduation","Technical","Professional"};
        NumericKeyBoardTransformationMethod numKeyBoard;

        TextInputLayout educationDetailsTextInputLayout,educationDetailsTextInputLayout1,educationDetailsTextInputLayout2,
                educationDetailsTextInputLayout3,educationDetailsTextInputLayout4,educationDetailsTextInputLayout5;

        Button addEmpEducation,delEmpEducation;

        ArrayAdapter<String> adapter;

        public EducationViewHolder(@NonNull View itemView) {
            super(itemView);
            passingYear=(EditText) itemView.findViewById(R.id.passingYear);
            marksObtained=(EditText) itemView.findViewById(R.id.marksObtained);
            stream=(EditText) itemView.findViewById(R.id.stream);
            grade=(EditText) itemView.findViewById(R.id.grade);
            nameOfBoardEditText=(EditText) itemView.findViewById(R.id.nameOfBoardEditText);

            marksObtained.setTransformationMethod(numKeyBoard);

            educationDetailsTextInputLayout=(TextInputLayout) itemView.findViewById(R.id.educationDetailsTextInputLayout);
            educationDetailsTextInputLayout1=(TextInputLayout) itemView.findViewById(R.id.educationDetailsTextInputLayout1);
            educationDetailsTextInputLayout2=(TextInputLayout) itemView.findViewById(R.id.educationDetailsTextInputLayout2);
            educationDetailsTextInputLayout3=(TextInputLayout) itemView.findViewById(R.id.educationDetailsTextInputLayout3);
            educationDetailsTextInputLayout4=(TextInputLayout) itemView.findViewById(R.id.educationDetailsTextInputLayout4);
            educationDetailsTextInputLayout5=(TextInputLayout) itemView.findViewById(R.id.educationDetailsTextInputLayout5);

            educationSpinner=(Spinner) itemView.findViewById(R.id.educationSpinner);

            addEmpEducation=(Button) itemView.findViewById(R.id.addEmpEducation);
            delEmpEducation=(Button) itemView.findViewById(R.id.delEmpEducation);

            passingYear.setOnTouchListener(new View.OnTouchListener() {
                @Override
                public boolean onTouch(View v, MotionEvent event) {
                    validationsObj.dateDialog(passingYear,(Activity) v.getContext(),event);
                    //mEmpEducationDetailsList.get(getAdapterPosition()).setPassingYear(String.valueOf(passingYear.getText()));
                    return true;
                }
            });
            adapter = new ArrayAdapter<String>(itemView.getContext(),
                    android.R.layout.simple_spinner_item,paths);

            adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
            educationSpinner.setAdapter(adapter);

            delEmpEducation.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    mEmpEducationDetailsList.remove(getAdapterPosition());
                    notifyItemRemoved(getAdapterPosition());
                    notifyItemRangeChanged(getAdapterPosition(), mEmpEducationDetailsList.size());
                }
            });
            addEmpEducation.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    /*mEmpEducationDetailsList.add(new EmpEducationDetailsModel.EmpEducationDetails());
                    notifyItemInserted(getAdapterPosition());
                    notifyItemRangeChanged(getAdapterPosition(), mEmpEducationDetailsList.size());*/
                    addItem();
                }
            });
        }
    }
}

Answer 1

I understand your problem, first you have to use interface for both deletion and addition of card, using interface you have to update Arraylist of EmpEducationInfoFormActivity.java class, after that you have to call empEducationDetailsAdapter.notifyDataSetChanged();

For deletion of card, remove the record from arraylist of particular postion and after that call empEducationDetailsAdapter.notifyDataSetChanged(); it will refresh the recyclerview.

For addition of card, add new data in arraylist at last postion and after that call empEducationDetailsAdapter.notifyDataSetChanged(); it will refresh the recyclerview.