Retrieve Filtered Data In Android Using PHP MySQL

activity_mail.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
app:layout_behavior="@string/appbar_scrolling_view_behavior"
tools:context="com.app.srcecde.search_example1.MainActivity"
tools:showIn="@layout/activity_main">

<EditText
android:layout_width="100dp"
android:layout_height="wrap_content"
android:id="@+id/editText"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true" />

<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Search"
android:id="@+id/search"
android:layout_alignBottom="@+id/editText"
android:layout_toRightOf="@+id/editText"
android:layout_toEndOf="@+id/editText" />
<Spinner
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/spinner1"
android:layout_below="@+id/search"
android:layout_marginTop="20dp" />

</RelativeLayout>

MainActivity.java

package com.app.srcecde.search_example1;

import android.content.ContentValues;
import android.os.Bundle;
import android.os.StrictMode;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.util.Log;
import android.view.View;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Spinner;
import android.widget.Toast;

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

import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.ArrayList;
import java.util.List;

public class MainActivity extends AppCompatActivity {

Spinner spinner1;
EditText e;
InputStream is=null;
String result=null;
String line=null;
HttpURLConnection urlConnection = null;

String text;
String [] city;


@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);

StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build(); StrictMode.setThreadPolicy(policy);

spinner1 = (Spinner) findViewById(R.id.spinner1);
final List<String> list1 = new ArrayList<String>();
e = (EditText) findViewById(R.id.editText);
Button b = (Button) findViewById(R.id.search);

b.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
//Toast.makeText(getApplicationContext(), "Invalid IP Address",Toast.LENGTH_LONG).show();

text = e.getText().toString(); //Here i am storing the entered text in the string format in text variable

ContentValues values = new ContentValues();
values.put("1", text);  // This will append the entered text in the url for filter purpose


try {

URL url = new URL("http://192.168.43.94/proj/search_example.php?string1="+text);
urlConnection = (HttpURLConnection) url.openConnection();
urlConnection.setRequestMethod("POST");
urlConnection.connect();
is = urlConnection.getInputStream();
}
catch (Exception e)
{
Log.e("Fail 1", e.toString());
}

try
{
BufferedReader reader = new BufferedReader(new InputStreamReader(is,"iso-8859-1"),8);
StringBuilder sb = new StringBuilder();
while ((line = reader.readLine()) != null)
{
sb.append(line + "\n");
}
is.close();
result = sb.toString();
}
catch(Exception e)
{
Log.e("Fail 2", e.toString());
}


try
{
JSONArray JA=new JSONArray(result);
JSONObject json= null;

city = new String[JA.length()];


for(int i=0;i<JA.length();i++)
{
json=JA.getJSONObject(i);
city[i] = json.getString("city");

}
//                    Toast.makeText(getApplicationContext(), "Data Loaded", Toast.LENGTH_LONG).show();

for(int i=0;i<city.length;i++)
{
list1.add(city[i]);

}

spinner_fn();

}
catch(Exception e)
{

Log.e("Fail 3", e.toString());


}


}
});


FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
fab.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
.setAction("Action", null).show();
}
});
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}

@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();

//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}

return super.onOptionsItemSelected(item);
}

private void spinner_fn() {
// TODO Auto-generated method stub

ArrayAdapter<String> dataAdapter1 = new ArrayAdapter<String>(getApplicationContext(),
android.R.layout.simple_spinner_item, city);
dataAdapter1.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spinner1.setAdapter(dataAdapter1);

}

}

search_example.php

<?php
$host='127.0.0.1:3340';
$uname='root';
$pwd='toor';
$db='search';
$con = mysqli_connect($host,$uname,$pwd) or die("connection failed");
mysqli_select_db($con,$db) or die("db selection failed");

if($_GET['string1'])
{
$ia =$_GET['string1'];

$r=mysqli_query($con,"select city from example where country='$ia'");
while($row=mysqli_fetch_assoc($r))
{
$cls[]=$row;
//echo $fin."<br>";
}
echo json_encode($cls);
}
mysqli_close($con);

?>

Hello,
What if i want to do auto submit on upon text on the edittext without submit button. how do i do that