StaffViewAppo.java

package com.example.fbans.projecthm;


import android.app.DatePickerDialog;
import android.app.ProgressDialog;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.annotation.Nullable;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.DatePicker;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;

import com.android.volley.AuthFailureError;
import com.android.volley.Request;
import com.android.volley.Response;
import com.android.volley.VolleyError;
import com.android.volley.toolbox.StringRequest;
import com.example.fbans.projecthm.utils.Appointment;
import com.example.fbans.projecthm.utils.Constants;
import com.example.fbans.projecthm.utils.RequestHandler;

import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

import java.util.ArrayList;
import java.util.Calendar;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

public class StaffViewAppo extends Fragment {
    Button datepicker ;
    TextView date;
    private int mYear, mMonth, mDay;
    RecyclerView recyclerView;
    StaffViewAppoAdap adapter = new StaffViewAppoAdap();
    List<Appointment> appointments=new ArrayList<>();
    View vi;
    ProgressDialog progressDialog;


    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        // Inflate the layout for this fragment
        vi = inflater.inflate(R.layout.staff_view_appo,container,false);
        return vi;
    }

    @Override
    public void onViewCreated(View view, @Nullable Bundle savedInstanceState) {
        super.onViewCreated(view, savedInstanceState);
        datepicker= (Button) vi.findViewById(R.id.submit);
        recyclerView = vi.findViewById(R.id.recycler);
        if (recyclerView!=null) {
            recyclerView.setLayoutManager(new LinearLayoutManager(getActivity()));
        }

        recyclerView.setAdapter(adapter);

        datepicker.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                viewAppo();
            }
        });



        date=(TextView)vi.findViewById(R.id.search_date);
        date.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                if (view == date) {

                    // Get Current Date
                    final Calendar c = Calendar.getInstance();
                    mYear = c.get(Calendar.YEAR);
                    mMonth = c.get(Calendar.MONTH);
                    mDay = c.get(Calendar.DAY_OF_MONTH);
                    DatePickerDialog datePickerDialog = new DatePickerDialog(getActivity(),
                            new DatePickerDialog.OnDateSetListener() {
                                @Override
                                public void onDateSet(DatePicker datePicker, int year,
                                                      int monthOfYear, int dayOfMonth) {
                                    date.setText(dayOfMonth + "-" + (monthOfYear + 1) + "-" + year);

                                }
                            }, mYear, mMonth, mDay);
                    datePickerDialog.getDatePicker().setMaxDate(System.currentTimeMillis()-1000);
                    datePickerDialog.show();
                }
            }
        });
        progressDialog = new ProgressDialog(getContext());

    }

    public void viewAppo() {
        Log.i("Into View Appo:", "Json Parsing");
        final String apdate = date.getText().toString();

        if (date.getText().toString().equals("")) {
            Toast.makeText(getContext(), "Enter date", Toast.LENGTH_LONG).show();
        }
        progressDialog.setMessage("Loading...");
        progressDialog.show();

        final StringRequest request = new StringRequest(Request.Method.POST, Constants.VIEW_APPO_URL, new Response.Listener<String>() {
            @Override
            public void onResponse(String response) {
                appointments.clear();
                progressDialog.dismiss();
                try {
                    JSONArray array = new JSONArray(response);
                    for (int i = 0; i < array.length(); i++) {
                        JSONObject object = array.getJSONObject(i);
                        Appointment appointment = new Appointment(object.getInt("id"), object.getString("name"), object.getString("time"), object.getString("moblie"), object.getString("purpose"));
                        appointments.add(appointment);

                    }
                    if (appointments.isEmpty()){
                        Toast.makeText(getContext(), "No appointments", Toast.LENGTH_SHORT).show();
                    }
                    adapter = new StaffViewAppoAdap(getContext(), appointments);
                    recyclerView.setAdapter(adapter);
                    adapter.notifyDataSetChanged();
                } catch (JSONException e) {
                    e.printStackTrace();
                }
            }
        }, new Response.ErrorListener() {
            @Override
            public void onErrorResponse(VolleyError error) {
                progressDialog.dismiss();
                Log.i("Volley Error:", error.getMessage());

            }
        }) {
            @Override
            protected Map<String, String> getParams() throws AuthFailureError {
                Map<String, String> params = new HashMap<>();
                params.put("f1", apdate);
                return params;
            }
        };
        RequestHandler.getInstance(getContext()).addToRequestQueue(request);
    }
}