首先是編寫 Android Login 程式，Android 程式負責登入功能，將輸入使用者的帳號、密碼傳送給後端 PHP 處理，並回傳登入是否成功的訊息。
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| Android Java Login PHP 登入程式 |
- 操作系統：Windows 7 64-bit 版本
- 開發環境：Android Studio 4.0.1 版本
- 測試手機：Samsung Galaxy M33 5G
- 測試手機系統版本：Android 12（Snow Cone / 2021）Android Studio 12 版本（Snow Cone）Build.VERSION_CODES.S / SDK 31
- 原程式：C:\Development\Development_Android\Android_Project\DIY-Android-107-08b LoginBugworkshop Bugworkshop 20230914
- 程式：C:\Development\Development_Android\Android_Project\ DIY-Android-107-08b LoginBugworkshop Bugworkshop 20230914
Android Java Login PHP 登入程式編程步驟：
- 輸入個人電郵和密碼，按 Login 鍵
- 程式會將電郵和密碼轉成 JSON，然後 POST 到 NAS PHP 的 URL
- PHP Server 接收電郵和密碼，便會連接 MySQL 並查詢電郵和密碼是否正確，將結果傳回手機
- 手機接收結果，並顯示解讀
AndroidManifest.xml：
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<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="bugworkshop.loginSystem">
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" /> <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" /> <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:theme="@style/AppTheme" android:usesCleartextTraffic="true">
<activity android:name=".Login> <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> </application>
</manifest> |
activity_login.xml：
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<?xml version="1.0" encoding="utf-8"?> <androidx.constraintlayout.widget.ConstraintLayout 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:textAlignment="center">
<TextView android:id="@+id/textUser" android:layout_width="80dp" android:layout_height="57dp" android:layout_marginStart="20dp" android:layout_marginTop="48dp" android:text="User :" android:textSize="30sp" app:layout_constraintStart_toStartOf="parent" app:layout_constraintTop_toTopOf="parent" />
<EditText android:id="@+id/email" android:layout_width="234dp" android:layout_height="57dp" android:layout_marginStart="10dp" android:layout_marginTop="48dp" android:inputType="text" android:textSize="30sp" app:layout_constraintStart_toEndOf="@+id/textUser" app:layout_constraintTop_toTopOf="parent" />
<TextView android:id="@+id/textPassword" android:layout_width="150dp" android:layout_height="50dp" android:layout_marginStart="20dp" android:layout_marginTop="24dp" android:text="Password :" android:textSize="30sp" app:layout_constraintStart_toStartOf="parent" app:layout_constraintTop_toBottomOf="@+id/textUser" />
<EditText android:id="@+id/password" android:layout_width="176dp" android:layout_height="51dp" android:layout_marginStart="10dp" android:layout_marginTop="24dp" android:inputType="text" android:password="true" android:textSize="30sp" app:layout_constraintStart_toEndOf="@+id/textPassword" app:layout_constraintTop_toBottomOf="@+id/email" />
<Button android:id="@+id/signin" android:layout_width="206dp" android:layout_height="60dp" android:layout_marginTop="32dp" android:text="LOGIN" android:textSize="30sp" app:layout_constraintEnd_toEndOf="parent" app:layout_constraintHorizontal_bias="0.497" app:layout_constraintStart_toStartOf="parent" app:layout_constraintTop_toBottomOf="@+id/password" />
<TextView android:id="@+id/hello" android:layout_width="299dp" android:layout_height="53dp" android:layout_marginTop="36dp" android:text="Hello" android:textAlignment="center" android:textSize="24sp" app:layout_constraintEnd_toEndOf="parent" app:layout_constraintHorizontal_bias="0.504" app:layout_constraintStart_toStartOf="parent" app:layout_constraintTop_toBottomOf="@+id/signin" />
</androidx.constraintlayout.widget.ConstraintLayout> |
Login.java：
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package bugworkshop.loginSystem;
import androidx.appcompat.app.AppCompatActivity; import android.os.Bundle; import android.util.Log; import android.view.View; import android.widget.Button; import android.widget.EditText; import android.widget.TextView; import android.widget.Toast;
import com.android.volley.AuthFailureError; import com.android.volley.Request; import com.android.volley.RequestQueue; import com.android.volley.Response; import com.android.volley.VolleyError; import com.android.volley.toolbox.StringRequest; import com.android.volley.toolbox.Volley;
import org.json.JSONArray; import org.json.JSONException; import org.json.JSONObject;
import java.util.HashMap; import java.util.Map;
public class Login extends AppCompatActivity {
EditText password, email; TextView hello; Button signin; TextView alert;
String pass,mail; public RequestQueue mQueue;
@Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_login);
password = findViewById(R.id.password); email = findViewById(R.id.email); hello = findViewById(R.id.hello); signin = findViewById(R.id.signin);
signin.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { checklogin(); } }); }
private void checklogin() {
mail = email.getText().toString().trim(); pass = password.getText().toString().trim();
String url = "http://192.168.0.122/~test/efarm//login.php";
StringRequest sr = new StringRequest(Request.Method.POST,url, new Response.Listener<String>() { @Override public void onResponse(String response) { try { JSONObject jsonobject = new JSONObject(response); String success = jsonobject.getString("success"); JSONArray jsonarray = jsonobject.getJSONArray("login"); JSONObject jo = jsonarray.getJSONObject(0);
if(success.equals("1")) { hello.setText(jo.getString("Name") + " Login OK"); } else{ hello.setText("Wrong Username or Password"); } } catch (JSONException e) { e.printStackTrace(); } } }, new Response.ErrorListener() { @Override public void onErrorResponse(VolleyError error) { error.printStackTrace(); hello.setText("Error Logging in check Internet Connection"); Toast.makeText(getApplicationContext(), "Error Logging in check Internet Connection", Toast.LENGTH_LONG).show(); } }){ @Override protected Map<String,String> getParams(){ HashMap<String,String> param = new HashMap<String,String>(); param.put("email",mail); param.put("password",pass); return param; }
@Override public Map<String, String> getHeaders() throws AuthFailureError { Map<String,String> params = new HashMap<String, String>(); params.put("Content-Type","application/x-www-form-urlencoded"); return params; } };
mQueue = Volley.newRequestQueue(Login.this); mQueue.add(sr); } } |
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