[

package com.example.ortel.test;

import android.app.AlertDialog;

import android.content.Context;

import android.os.AsyncTask;

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;


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];

        String login_url = "http://tagnetserver.php/login.php";

        if(type.equals("login")) {

            try {

                String user_name = params[1];

                String password = params[2];

                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("password","UTF-
8")+"="+URLEncoder.encode(password,"UTF-8");

                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();

                return result;

            } catch (MalformedURLException e) {

                e.printStackTrace();

            } catch (IOException e) {

                e.printStackTrace();

            }

        }

        return null;

    }



    @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();

    }



    @Override

    protected void onProgressUpdate(Void... values) {

        super.onProgressUpdate(values);

    }

}



package com.example.ortel.test;

import android.content.Intent;

import android.support.v7.app.AppCompatActivity;

import android.os.Bundle;

import android.view.Menu;

import android.view.MenuItem;

import android.view.View;

import android.widget.EditText;

import android.widget.Toast;





public class MainActivity extends AppCompatActivity {

    EditText UsernameEt, PasswordEt;

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        UsernameEt = (EditText)findViewById(R.id.etUserName);

        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.execute(type, username, password);

    }



}



THIS IS THE NEXT FILE!!!!!!!!!!!!!!!___________________________________________________________

/*package com.example.ortel.test;

import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.EditText;
import android.widget.Toast;



public class MainActivity extends AppCompatActivity {
    EditText phonenumberET,PasswordEt,UsernameEt,idET ;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        //phonenumberET = (EditText)findViewById(R.id.etPhoneNumber);
        PasswordEt = (EditText)findViewById(R.id.etPassword);
        UsernameEt = (EditText)findViewById(R.id.etUserName);
        //idET = (EditText)findViewById(R.id.etId);

    }

    public void OnLogin(View view) {
        String username = UsernameEt.getText().toString();
        String password = PasswordEt.getText().toString();
        String phonenumber = phonenumberET.getText().toString();
        String id = idET.getText().toString();
        String type = "login";
        BackgroundWorker backgroundWorker = new BackgroundWorker(this);
        backgroundWorker.execute(type,username,password);
    }

}
*/
package com.example.ortel.test;

import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.EditText;
import android.widget.Toast;


public class MainActivity extends AppCompatActivity {
    EditText UsernameEt, PasswordEt;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        UsernameEt = (EditText)findViewById(R.id.etUserName);
        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.execute(type, username, password);
    }

}