View difference between Paste ID: qFJj4Q2L and Mmsbh1gb

 // main class which draws the app + ties the actions on the front end XML files such as onClick for buttons //and calls the associated method, in this case onLogin which then creates a background worker object thingy.
 
 package hfents.hopefullyworks;
 
 import android.os.Bundle;
 import android.os.StrictMode;
 import android.support.v7.app.AppCompatActivity;
 import android.view.View;
 import android.widget.EditText;
 
 public class MainActivity extends AppCompatActivity {
 
     EditText UserNameEt, PasswordEt;
 
     StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
 
 
 
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
 
 
         StrictMode.setThreadPolicy(policy);
 
 
         setContentView(R.layout.activity_main);
         //connecting to xml buttons.
         UserNameEt = (EditText) findViewById(R.id.etLogin);
         PasswordEt = (EditText) findViewById(R.id.etPassword);
     }
 
     public void OnLogin(View view){
         String userName = UserNameEt.getText().toString();
         String password = PasswordEt.getText().toString();
         String type = "login";
 
         BackgroundWorker backgroundWorker = new BackgroundWorker(this);
         backgroundWorker.doInBackground(type, userName, password);
 
 
     }
 }
 
 
 // background worker class which is responsible for starting all the Http streams and stuff like that, passing the arguments through e.g. arg[0] is login, which the logic then calls a php script I've named login.php or something. then passes everything else accordingly.
 
 package hfents.hopefullyworks;
 
 import android.app.AlertDialog;
 import android.content.Context;
 import android.os.AsyncTask;
 import android.util.Log;
 
 import java.io.BufferedReader;
 import java.io.BufferedWriter;
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.InputStreamReader;
 import java.io.OutputStream;
 import java.io.OutputStreamWriter;
 import java.net.HttpURLConnection;
 import java.net.MalformedURLException;
 import java.net.URL;
 import java.net.URLEncoder;
 
 /**
  * Created by jonathanbain on 01/09/2017.
  */
 
 public class BackgroundWorker extends AsyncTask<String,Void,String>{
 
     Context context;
     AlertDialog alertDialog;
     BackgroundWorker(Context ctx){
         context = ctx;
     }
 
     @Override
     protected String doInBackground(String... params) {
         String type = params[0]; //first arg (login)
         String user_name = params[1];
         String user_password = params[2];
         String login_url = "http://root@138.68.168.141/login.php";
         if(type.equals("login")){
             //code for logging in
 
             try {
                 URL url = new URL(login_url);
 
                     HttpURLConnection httpURLConnection = (HttpURLConnection) url.openConnection();
 
 
 
                 httpURLConnection.setRequestMethod("POST");
                 httpURLConnection.setDoOutput(true);
                 httpURLConnection.setDoInput(true);
                 OutputStream outputStream = httpURLConnection.getOutputStream();
                 BufferedWriter bufferedWriter = new BufferedWriter(new OutputStreamWriter(outputStream,"UTF-8"));
                 String post_data = URLEncoder.encode("user_name","UTF-8")+"="+URLEncoder.encode(user_name,"UTF-8")+"&"
                     +URLEncoder.encode("user_password","UTF-8")+"="+URLEncoder.encode(user_password,"UTF-8");
                  //   Log.d("U", user_name);
                  //   Log.d("P", user_password);
                 bufferedWriter.write(post_data);
 
                 bufferedWriter.flush();
                 bufferedWriter.close();
                 outputStream.close();
 
                 InputStream inputStream = httpURLConnection.getInputStream();
 
                 BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(inputStream,"iso-8859-1"));
                 String result="";
                 String line;
                 while((line = bufferedReader.readLine())!=null){
                     result+=line;
                 }
 
                 bufferedReader.close();
                 inputStream.close();
                 httpURLConnection.disconnect();
                 Log.d("Username=", user_name);
                 Log.d("Password=", user_password);
                 Log.d("RESULT", result);
                 return result;
             } catch (MalformedURLException e){
                         Log.d( "Malformed URL EXCEPTION",": Background Worker Login");
 
             }
             catch (IOException e) {
 
                 Log.d("IO Exception:", Log.getStackTraceString(e));
             }
 
         }
         return "";
     }
 
     @Override
     protected void onPreExecute(){
         alertDialog = new AlertDialog.Builder(context).create();
         alertDialog.setTitle("Login Status");
 
     }
     @Override
     protected void onPostExecute(String result){
         alertDialog.setMessage(result);
         alertDialog.show();
     }
 
 
 }
 
 
 // this is the login php file (ignore the config and connection ones as they work i think...
 
 <?php
 require "conn.php";
 $user_name = $_POST["user_name"];
 $user_pass = $_POST["user_password"];
 echo $_POST["user_name"];
 echo $_POST["user_password"];
 echo $user_name;
 echo $user_pass;
 
 $mysql_qry = "SELECT * FROM users WHERE email LIKE '$user_name' AND password LIKE '$user_pass';";
 $result = mysqli_query($conn ,$mysql_qry);
 if(mysqli_num_rows($result)>0){
 echo "login success, welcome user" ;
 }
 else{
 echo "loooooogin not success";
 }
 ?>