前情:
大家好上次發問安卓連接資料庫的問題，感謝各位大大們的解答與幫助
最後我決定使用php來連接MySQL與Android，這次要試著做登入系統(沒有註冊是因為APP上並沒有需要註冊的功能)，由於我是第一次接觸php，撰寫Android的時間也不長，以下的問題是我先模仿Github上的開放程式碼試著做時碰到的

正題:
我參考的範例原本有自己的資料庫，但因為我有資料庫就換成自己的嘗試做做看，我在打完所有程式碼與看完他的實作範例影片後，試著run了一次，卻一直顯示如下圖的照片，我試過不輸入數值、打錯帳密、輸入正確的帳密都是一樣的結果，我設置登入正確會轉跳其他頁面，但它就只有一直卡住，因為我不太熟悉php、Android，深怕改了哪裡導致邏輯錯誤，還希望有大大能協助我解決問題!

範例的登入畫面:

範例的結果(有轉跳畫面並下方顯示登入成功):

我嘗試的結果(畫面上是正確的帳密，登入後卻沒有轉跳也顯示錯誤字樣還跑亂碼):

以下是我的程式碼&資料庫(只使用到users這個資料表的資料):
1.users資料表的結構

2.users資料表的資料內容

php程式碼如下:
1.config.php(定義資料庫)

<?php
class config{
	
	public $host;
	public $dbname;
	public $dbpassword;
	public $database;
	
	public function __construct()
    {

        $this->host = 'localhost';
        $this->dbname = 'root';
        $this->dbpassword = '1234';
        $this->database = 'dbsa';
    }
}
?>

2.DataBase.php(建立連線與function)

<?php
require "config.php";

class DataBase
{
    public $connect;
    public $data;
    private $sql;
    protected $host;
    protected $dbname;
    protected $dbpassword;
    protected $database;

    public function __construct()
    {
        $this->connect = null;
        $this->data = null;
        $this->sql = null;
        $dbc = new config();
        $this->host = $dbc->host;
        $this->dbname = $dbc->dbname;
        $this->dbpassword = $dbc->dbpassword;
        $this->database = $dbc->database;
    }

    function dbConnect()
    {
        $this->connect = mysqli_connect($this->host, $this->dbname, $this->dbpassword, $this->database);
        return $this->connect;
    }

    function prepareData($data)
    {
        return mysqli_real_escape_string($this->connect, stripslashes(htmlspecialchars($data)));
    }

    function logIn($table, $users_staffid, $users_Password)
    {
        $users_staffid = $this->prepareData($users_staffid);
        $users_Password = $this->prepareData($users_Password);
        $this->sql = "select * from " . $table . " where users = '" . $users_staffid . "'";
        $result = mysqli_query($this->connect, $this->sql);
        $row = mysqli_fetch_assoc($result);
        if (mysqli_num_rows($result) != 0) {
            $dbusername = $row['users_staffid'];
            $dbpassword = $row['users_Passwords'];
            if ($dbusername == $users_staffid && password_verify($users_Password, $dbpassword)) {
                $login = true;
            } else $login = false;
        } else $login = false;

        return $login;
    }
}

?>

3.login.php(判斷登入)

<?php
require "DataBase.php";

$db = new DataBase();

if (isset($_POST['users_staffid']) && isset($_POST['users_Password'])) {
    if ($db->dbConnect()) {
        if ($db->logIn("users", $_POST['users_staffid'], $_POST['users_Password'])) {
            echo "Login Success";
        } else echo "Username or Password wrong";
    } else echo "Error: Database connection";
} else echo "All fields are required";



?>

Android程式碼如下:
1.layout_login.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"
    tools:context=".login">

    <TextView
        android:id="@+id/logintitle"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="LOGIN"
        android:textSize="30sp"
        android:textStyle="bold"
        android:gravity="center"
        android:layout_marginTop="30sp"/>

    <LinearLayout
        android:id="@+id/LL1"
        android:layout_below="@+id/logintitle"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="80dp"
        android:layout_marginRight="30dp"
        android:layout_marginLeft="30dp">

        <TextView
            android:id="@+id/tv1"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="@string/username"
            android:textSize="25dp"/>

        <EditText
            android:id="@+id/users_staffId"
            android:layout_toRightOf="@+id/tv1"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"/>

    </LinearLayout>

    <LinearLayout
        android:id="@+id/LL2"
        android:layout_below="@+id/LL1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_margin="30sp">
        <TextView
            android:id="@+id/tv2"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="@string/password"
            android:textSize="25dp"/>

        <EditText
            android:id="@+id/users_Password"
            android:layout_toRightOf="@+id/tv1"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"/>

    </LinearLayout>

    <ProgressBar
        android:layout_below="@+id/LL2"
        android:id="@+id/progress"
        android:visibility="gone"
        android:layout_centerHorizontal="true"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"/>

    <Button
        android:id="@+id/btn_login"
        android:layout_below="@+id/progress"
        android:layout_marginTop="50sp"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerHorizontal="true"
        android:text="登入"
        android:textSize="25sp"/>


</RelativeLayout>

layout_login.xml 照片比對:

login.java完整程式碼

package com.example.satest;

import androidx.appcompat.app.AppCompatActivity;

import android.content.Intent;
import android.os.Bundle;
import android.os.Handler;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ProgressBar;
import android.widget.Toast;

import com.vishnusivadas.advanced_httpurlconnection.PutData;

public class login extends AppCompatActivity {

    EditText et1,et2;
    Button btn_login;
    ProgressBar progressBar;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.layout_login);

        et1 = findViewById(R.id.users_staffId);
        et2 = findViewById(R.id.users_Password);
        btn_login = findViewById(R.id.btn_login);
        progressBar = findViewById(R.id.progress);

        btn_login.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                final String users_staffId,users_Password;

                users_staffId =String.valueOf(et1.getText());
                users_Password = String.valueOf(et2.getText());

                if(!users_staffId.equals("") && !users_Password.equals("")){
                    progressBar.setVisibility(View.VISIBLE);
                    Handler handler = new Handler();
                    handler.post(new Runnable() {
                        @Override
                        public void run() {
                            String[] field = new String[2];
                            field[0] = "users_staffId";
                            field[1] = "users_Password";
                            String[] data = new String[2];
                            data[0] = users_staffId;
                            data[1] = users_Password;
                            PutData putData = new PutData("http://192.168.0.5/safinal/login.php","POST",field,data);
                            if(putData.startPut()){
                                if(putData.onComplete()){
                                    progressBar.setVisibility(View.VISIBLE);
                                   String result = putData.getResult();
                                   if(result.equals("Login Success")){
                                       Toast.makeText(getApplicationContext(),result,Toast.LENGTH_SHORT).show();
                                       Intent intent = new Intent(getApplicationContext(),MainActivity.class);
                                       startActivity(intent);
                                       finish();
                                   }
                                   else{
                                       Toast.makeText(getApplicationContext(),result,Toast.LENGTH_SHORT).show();
                                   }
                                }
                            }
                        }
                    });
                }
                else{
                    Toast.makeText(getApplicationContext(),"All fields required",Toast.LENGTH_SHORT).show();
                }
            }
        });

    }
}

AndroidManifest.xml程式碼(我有寫入uses-permission):

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.satest">

    <uses-permission android:name="android.permission.INTERNET"/>

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:usesCleartextTraffic="true"
        android:theme="@style/Theme.Satest">
        <activity android:name=".login"
            android:theme="@style/Theme.Design.Light.NoActionBar">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <activity android:name=".MainActivity" android:theme="@style/Theme.Design.Light.NoActionBar"/>
    </application>

</manifest>