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<?php



require_once 'connect.php';



//checking if any error occured while connecting

if(mysqli_connect_errno()){

    echo "Failed to connect to MySQL: " . mysqli_connect_error();

    die();

}



//creating a query

$stmt = $conn->prepare("SELECT AVG(rb_fd),AVG(rb_check_in),AVG(rb_check_out),AVG(rb_room),AVG(rb_staff),AVG(rb_navigation),AVG(rb_fs),AVG(rb_decor),AVG(rb_facilities),AVG(rb_wifi) FROM rating;");



//executing the query

$stmt->execute();



//binding result to the query

$stmt->bind_result($rb_fd,$rb_check_in,$rb_check_out,$rb_room,$rb_staff,$rb_navigation,$rb_fs,$rb_decor,$rb_facilities,$rb_wifi);



$rating = array();



//traversing throung all the result

while($stmt->fetch()){

    $temp = array();

    $temp['FD'] = $rb_fd;

    $temp['CI'] = $rb_check_in;

    $temp['CO'] = $rb_check_out;

    $temp['R'] = $rb_room;

    $temp['S'] = $rb_staff;

    $temp['N'] = $rb_navigation;

    $temp['FS'] = $rb_fs;

    $temp['D'] = $rb_decor;

    $temp['F'] = $rb_facilities;

    $temp['W'] = $rb_wifi;

    array_push($rating, $temp);

}



//displaying the result in json format

echo json_encode($rating);



?>

[

    {

        "FD": 2.5,

        "CI": 2.5,

        "CO": 2.6666666666666665,

        "R": 2.5,

        "S": 3,

        "N": 3.3333333333333335,

        "FS": 3,

        "D": 2,

        "F": 3.5,

        "W": 3.6666666666666665

    }

]

package com.example.user.hotelsuriamalaqaapp;



import android.app.Dialog;

import android.graphics.Bitmap;

import android.graphics.Color;

import android.media.Rating;

import android.support.v7.app.AppCompatActivity;

import android.os.Bundle;

import android.view.View;

import android.widget.Button;

import android.widget.EditText;

import android.widget.ImageView;

import android.widget.ListView;

import android.widget.TextView;



import com.android.volley.Request;

import com.android.volley.RequestQueue;

import com.android.volley.Response;

import com.android.volley.VolleyError;

import com.android.volley.toolbox.StringRequest;

import com.android.volley.toolbox.Volley;

import com.github.mikephil.charting.charts.BarChart;

import com.github.mikephil.charting.data.BarData;

import com.github.mikephil.charting.data.BarDataSet;

import com.github.mikephil.charting.data.BarEntry;



import org.json.JSONArray;

import org.json.JSONException;

import org.json.JSONObject;



import java.text.ParseException;

import java.text.SimpleDateFormat;

import java.util.ArrayList;

import java.util.Calendar;

import java.util.Date;

import java.util.List;

import java.util.Random;



public class AdminViewRating extends AppCompatActivity {



    private BarChart barChart;

    private BarData barData;

    private ListView rate;



    List<Rate2> ratingList;



    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_admin_view_rating);



        //This is code for bar chart

        barChart = (BarChart) findViewById(R.id.barchart);

        barData = new BarData(getXvalues(), getBarValues());

        barData.setValueTextColor(Color.WHITE);

        barChart.setData(barData);

        barChart.setBackgroundColor(Color.WHITE);

        barChart.getXAxis().setTextColor(Color.BLACK);

        barChart.setDescription("Rating");



        barChart.setGridBackgroundColor(Color.DKGRAY);

        barChart.animateXY(3000, 3000);

        barChart.invalidate();



        rate=findViewById(R.id.rate3);



        ratingList=new ArrayList<>();

    }



    private ArrayList<BarDataSet> getBarValues() {

        StringRequest stringRequest = new StringRequest(Request.Method.GET, constant.URL_KIRA,

            new Response.Listener<String>() {

        ArrayList<BarDataSet> barDataSets;

        ArrayList<BarEntry> barEntries = new ArrayList<>();

        BarDataSet barDataSet = new BarDataSet(barEntries, "Rates");

        barDataSets = new ArrayList<>();



        try {

            //converting the string to json array object

            JSONObject jsonObject = new JSONObject();

            JSONArray jsonArray=jsonObject.getJSONArray("rating");



            //traversing through all the object

            for (int i = 0; i < jsonArray.length(); i++) {



                //getting product object from json array

                JSONObject object = jsonArray.getJSONObject(i);



                ratingList.add(new Rate2(

                        object.getString("FD"),

                        object.getString("CI"),

                        object.getString("CO"),

                        object.getString("R"),

                        object.getString("S"),

                        object.getString("N"),

                        object.getString("FS"),

                        object.getString("D"),

                        object.getString("F"),

                        object.getString("W")

                ));

                //barEntries.add(new BarEntry(rate,i);

            }



            barDataSet.setColor(Color.RED);

            barDataSets.add(barDataSet);





        } catch (JSONException e) {

            e.printStackTrace();

        }

        return barDataSets;

    }









    //This is coding for x axis

    private ArrayList<String> getXvalues(){

        ArrayList<String> xvalues = new ArrayList<>();

        xvalues.add("FD");

        xvalues.add("CI");

        xvalues.add("CO");

        xvalues.add("R");

        xvalues.add("S");

        xvalues.add("N");

        xvalues.add("FS");

        xvalues.add("D");

        xvalues.add("F");

        xvalues.add("W");



        return xvalues;

    }





}