package com.kismec.kismecapp1;

import android.app.Activity;
import android.app.ProgressDialog;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.net.Uri;
import android.os.AsyncTask;
import android.support.annotation.NonNull;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;

import org.json.JSONException;
import org.json.JSONObject;

import java.util.ArrayList;

/**
 * Created by selva on 11/11/2017.
 */

public class rowlayoutadapter extends ArrayAdapter<users>
{
    private ProgressDialog pDialog;
    JSONParser jsonParser = new JSONParser();
    private static final String url_login = "http://172.16.140.100/ukm/resetuser.php";
    private final Context context;
    private final ArrayList<users> users_list;

    public rowlayoutadapter(@NonNull Context context, ArrayList<users> users_list)
    {
        super(context, R.layout.rowlayout,users_list);
        this.context=context;
        this.users_list=users_list;
    }
    public View getView(int position, View convertview, ViewGroup parent)
    {
        LayoutInflater inflater = (LayoutInflater) context
                .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        View rowView = inflater.inflate(R.layout.rowlayout, parent, false);
        final TextView tfullname = (TextView) rowView.findViewById(R.id.tfullname);
        final TextView tusername = (TextView) rowView.findViewById(R.id.tusername);
        users obj=users_list.get(position);
        tfullname.setText(obj.fullname);
        tusername.setText(obj.username);
        Button btnreset=(Button)rowView.findViewById(R.id.btnreset);
        btnreset.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {
                    new resetuser().execute(tusername.getText().toString(),null,null);
            }
        });
        return rowView;
    }
    class resetuser extends AsyncTask<String, String, String>
    {
        protected void onPreExecute()
        {
            super.onPreExecute();
            pDialog = new ProgressDialog(context);
            pDialog.setMessage("Reseting user password. Please wait...");
            pDialog.setIndeterminate(false);
            pDialog.setCancelable(true);
            pDialog.show();
        }
        protected String doInBackground(String... params)
        {
            int success;
            try
            {
                Uri.Builder builder = new Uri.Builder()
                        .appendQueryParameter("username", params[0]);
                String query = builder.build().getEncodedQuery();
                JSONObject json = jsonParser.makeHttpRequest(url_login, query);
                if(json !=null)
                {
                    Log.d("resettinguser", json.toString());
                    success = json.getInt("result");
                    if (success == 1)
                    {
                        ((Activity) context).runOnUiThread(new Runnable()
                        {
                            public void run()
                            {
                                Toast.makeText(context, "Reset is success", Toast.LENGTH_LONG).show();
                            }
                        });
                    }
                    else
                    {
                        ((Activity) context).runOnUiThread(new Runnable()
                        {
                            public void run()
                            {
                                Toast.makeText(context, "Reset failed", Toast.LENGTH_LONG).show();
                            }
                        });
                    }
                }
                else
                {
                    ((Activity) context).runOnUiThread(new Runnable()
                    {
                        public void run()
                        {
                            Toast.makeText(context,"Unable to contact server",Toast.LENGTH_LONG).show();

                        }
                    });
                    return null;
                }
            }
            catch (JSONException e)
            {
                e.printStackTrace();
            }
            return null;
        }
        protected void onPostExecute(String file_url)
        {
            pDialog.dismiss();
        }
    }
}



resetuser.php

<?php
include "newdb.php";
$dbcon=connect_db();
?>
<?php
$username=$_POST["username"];
$flag=0;
$statement="update users set password='123456' where username='$username'";
if (mysqli_query($dbcon, $statement))
{
    $myObj=new \stdClass();
	$myObj->result = "1";
	$myJSON = json_encode($myObj);
	echo $myJSON;
	exit();
}
else
{
    $myObj=new \stdClass();
	$myObj->result = "2";
	$myJSON = json_encode($myObj);
	echo $myJSON;
	exit();
}
close_db();
?>