public class MainActivity extends AppCompatActivity {
        String JSON_STRING;
        private EditText editTextId;

        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main);
            editTextId = (EditText) findViewById(R.id.editTextId);
        }
        public void getJSON(View view){
        new BackgroundTask().execute();

        }

        class BackgroundTask extends AsyncTask<Void,Void,String> {

            String json_url;

            @Override
            protected void onPreExecute() {
                super.onPreExecute();
               json_url = "http://192.168.43.126/select/select.php?id="+editTextId.getText().toString().trim();
            }

            @Override
            protected String doInBackground(Void... voids) {


                try {
                    URL url=new URL(json_url);
                    HttpURLConnection httpURLConnection=(HttpURLConnection)url.openConnection();
                    InputStream inputStream=httpURLConnection.getInputStream();
                    BufferedReader bufferedReader=new BufferedReader(new InputStreamReader(inputStream));
                    StringBuilder stringBuilder= new StringBuilder();
                    while((JSON_STRING= bufferedReader.readLine())!=null){
                        stringBuilder.append(JSON_STRING+"n");
                    }
                    bufferedReader.close();
                    inputStream.close();
                    httpURLConnection.disconnect();
                    return stringBuilder.toString().trim();
                } catch (MalformedURLException e) {
                    e.printStackTrace();
                } catch (IOException e) {
                    e.printStackTrace();
                }
                return null;
            }

            @Override
            protected void onProgressUpdate(Void... values) {
                super.onProgressUpdate(values);
            }

            @Override
            protected void onPostExecute(String result) {
                TextView textview=(TextView)findViewById(R.id.textview);
                textview.setText(result);
            }
        }

    }

<?php

 if($_SERVER['REQUEST_METHOD']=='GET'){

 $id  = $_GET['id'];


 define('HOST','localhost');
 define('USER','root');
 define('PASS','');
 define('DB','test');

 $con = mysqli_connect(HOST,USER,PASS,DB) or die('Unable to Connect');

 $sql = "SELECT * FROM colleges WHERE name='".$id."'";

 $r = mysqli_query($con,$sql);


 $result = array();
 while($res = mysqli_fetch_array($r)) {

 $result[]=array(
 "name"=>$res['name'],
 "address"=>$res['address'],
 "vc"=>$res['vicechancellor']
 );
 }
 echo json_encode(array("result"=>$result));

 mysqli_close($con);

 }

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    android:paddingBottom="@dimen/activity_vertical_margin"
    tools:context="com.example.wvs.myapplication.MainActivity">
    <EditText
        android:id="@+id/editTextId"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:layout_toLeftOf="@+id/buttonGet"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true" />


    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="json"
        android:id="@+id/b1"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="39dp"
        android:onClick="getJSON"/>



    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="New Text"
        android:id="@+id/textview"
        android:layout_below="@+id/b2"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="48dp"
        />
    <ListView
        android:id="@+id/listView1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="14dp" >
    </ListView>
</RelativeLayout>