Atualizar LoginActivity e ContaActivity

app/src/main/java/com/example/vdcscore/LoginActivity.java

@@ -1,8 +1,10 @@
 package com.example.vdcscore;
 
 import android.content.Intent;
+import android.content.SharedPreferences;
 import android.os.Bundle;
 import android.widget.Button;
+import android.widget.CheckBox;
 import android.widget.TextView;
 import android.widget.Toast;
 
@@ -15,11 +17,17 @@ public class LoginActivity extends AppCompatActivity {
 
     TextInputEditText editEmail, editPassword;
     Button btnLogin;
+    CheckBox checkRememberMe;
     FirebaseAuth mAuth;
 
     private TextView criarContaTextView;
     private TextView txtForgotPassword;
     
+    private static final String PREFS_NAME = "LoginPrefs";
+    private static final String KEY_EMAIL = "email";
+    private static final String KEY_PASSWORD = "password";
+    private static final String KEY_REMEMBER = "remember";
+
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
@@ -28,6 +36,7 @@ public class LoginActivity extends AppCompatActivity {
         editEmail = findViewById(R.id.editEmail);
         editPassword = findViewById(R.id.editPassword2);
         btnLogin = findViewById(R.id.btnLogin);
+        checkRememberMe = findViewById(R.id.checkRememberMe);
         criarContaTextView = findViewById(R.id.txtRegister);
         txtForgotPassword = findViewById(R.id.txtForgotPassword);
 
@@ -36,6 +45,45 @@ public class LoginActivity extends AppCompatActivity {
         btnLogin.setOnClickListener(v -> loginUser());
         criarContaTextView.setOnClickListener(view -> criarConta());
         txtForgotPassword.setOnClickListener(view -> recuperarPassword());
+        
+        // Carregar credenciais guardadas
+        loadSavedCredentials();
+    }
+
+    private void loadSavedCredentials() {
+        SharedPreferences prefs = getSharedPreferences(PREFS_NAME, MODE_PRIVATE);
+        boolean remember = prefs.getBoolean(KEY_REMEMBER, false);
+        
+        if (remember) {
+            String savedEmail = prefs.getString(KEY_EMAIL, "");
+            String savedPassword = prefs.getString(KEY_PASSWORD, "");
+            
+            if (!savedEmail.isEmpty() && !savedPassword.isEmpty()) {
+                editEmail.setText(savedEmail);
+                editPassword.setText(savedPassword);
+                checkRememberMe.setChecked(true);
+                
+                // Tentar login automático
+                autoLogin(savedEmail, savedPassword);
+            }
+        }
+    }
+
+    private void autoLogin(String email, String password) {
+        mAuth.signInWithEmailAndPassword(email, password)
+                .addOnCompleteListener(task -> {
+                    if (task.isSuccessful()) {
+                        // Login automático bem-sucedido
+                        Intent intent = new Intent(LoginActivity.this, MainActivity.class);
+                        intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TASK);
+                        startActivity(intent);
+                        finish();
+                    } else {
+                        // Se o login automático falhar, apenas limpar a password do campo
+                        // O utilizador pode tentar fazer login manualmente
+                        editPassword.setText("");
+                    }
+                });
     }
 
     private void criarConta() {
@@ -60,11 +108,19 @@ public class LoginActivity extends AppCompatActivity {
         mAuth.signInWithEmailAndPassword(email, password)
                 .addOnCompleteListener(task -> {
                     if (task.isSuccessful()) {
+                        // Guardar credenciais se "Lembrar-me" estiver marcado
+                        if (checkRememberMe.isChecked()) {
+                            saveCredentials(email, password);
+                        } else {
+                            clearSavedCredentials();
+                        }
 
                         Toast.makeText(this, "Login efetuado!", Toast.LENGTH_SHORT).show();
 
                         // Abre a tua página principal
-                        startActivity(new Intent(LoginActivity.this, MainActivity.class));
+                        Intent intent = new Intent(LoginActivity.this, MainActivity.class);
+                        intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TASK);
+                        startActivity(intent);
                         finish();
 
                     } else {
@@ -77,12 +133,31 @@ public class LoginActivity extends AppCompatActivity {
                 });
     }
     
+    private void saveCredentials(String email, String password) {
+        SharedPreferences prefs = getSharedPreferences(PREFS_NAME, MODE_PRIVATE);
+        SharedPreferences.Editor editor = prefs.edit();
+        editor.putString(KEY_EMAIL, email);
+        editor.putString(KEY_PASSWORD, password);
+        editor.putBoolean(KEY_REMEMBER, true);
+        editor.apply();
+    }
+    
+    private void clearSavedCredentials() {
+        SharedPreferences prefs = getSharedPreferences(PREFS_NAME, MODE_PRIVATE);
+        SharedPreferences.Editor editor = prefs.edit();
+        editor.clear();
+        editor.apply();
+    }
+
     @Override
     protected void onStart() {
         super.onStart();
+        // Verificar se já está autenticado (caso o login automático não tenha funcionado)
         if (FirebaseAuth.getInstance().getCurrentUser() != null){
             Intent intent = new Intent(LoginActivity.this, MainActivity.class);
+            intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TASK);
             startActivity(intent);
+            finish();
         }
     }
 }

app/src/main/java/com/example/vdcscore/ui/definicoes/ContaActivity.java

@@ -3,6 +3,7 @@ package com.example.vdcscore.ui.definicoes;
 import android.Manifest;
 import android.app.ProgressDialog;
 import android.content.Intent;
+import android.content.SharedPreferences;
 import android.content.pm.PackageManager;
 import android.graphics.Bitmap;
 import android.graphics.BitmapFactory;
@@ -89,6 +90,7 @@ public class ContaActivity extends AppCompatActivity {
         editName = findViewById(R.id.editName);
         textEmail = findViewById(R.id.textEmail);
         btnSaveName = findViewById(R.id.btnSaveName);
+        btnLogout = findViewById(R.id.btnLogout);
         btnChangePhoto = findViewById(R.id.btnChangePhoto);
         cardImageContainer = findViewById(R.id.cardImageContainer);
         
@@ -224,6 +226,28 @@ public class ContaActivity extends AppCompatActivity {
         if (btnSaveName != null) {
             btnSaveName.setOnClickListener(v -> saveUserName());
         }
+        if (btnLogout != null) {
+            btnLogout.setOnClickListener(v -> logoutUser());
+        }
+    }
+    
+    private void logoutUser() {
+        // Limpar credenciais guardadas
+        SharedPreferences prefs = getSharedPreferences(PREFS_NAME, MODE_PRIVATE);
+        SharedPreferences.Editor editor = prefs.edit();
+        editor.clear();
+        editor.apply();
+        
+        // Fazer logout do Firebase
+        mAuth.signOut();
+        
+        Toast.makeText(this, "Sessão terminada", Toast.LENGTH_SHORT).show();
+        
+        // Voltar para o login
+        Intent intent = new Intent(ContaActivity.this, LoginActivity.class);
+        intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TASK);
+        startActivity(intent);
+        finish();
     }
 
     private void openImagePicker() {

app/src/main/res/layout/activity_conta.xml

@@ -233,6 +233,39 @@
 
             </com.google.android.material.card.MaterialCardView>
 
+            <!-- Logout Section -->
+            <com.google.android.material.card.MaterialCardView
+                android:id="@+id/cardLogout"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:layout_marginTop="24dp"
+                app:cardCornerRadius="20dp"
+                app:cardElevation="4dp"
+                app:cardBackgroundColor="#FFFFFF"
+                app:strokeWidth="0dp">
+
+                <LinearLayout
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    android:orientation="vertical"
+                    android:padding="24dp">
+
+                    <Button
+                        android:id="@+id/btnLogout"
+                        android:layout_width="match_parent"
+                        android:layout_height="56dp"
+                        android:backgroundTint="#D32F2F"
+                        android:text="Terminar Sessão"
+                        android:textColor="#FFFFFF"
+                        android:textSize="16sp"
+                        android:textStyle="bold"
+                        android:elevation="2dp"
+                        android:stateListAnimator="@null" />
+
+                </LinearLayout>
+
+            </com.google.android.material.card.MaterialCardView>
+
         </LinearLayout>
 
     </androidx.core.widget.NestedScrollView>

app/src/main/res/layout/activity_login.xml

@@ -146,6 +146,16 @@
 
             </com.google.android.material.textfield.TextInputLayout>
 
+            <!-- Remember Me Checkbox -->
+            <CheckBox
+                android:id="@+id/checkRememberMe"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_marginBottom="12dp"
+                android:text="Lembrar-me"
+                android:textColor="#616161"
+                android:textSize="14sp" />
+
             <!-- Forgot Password Link -->
             <TextView
                 android:id="@+id/txtForgotPassword"