🔐 AccessVault – Biometric Password Manager

A secure Android app that stores credentials using AES encryption, provides biometric authentication, and supports Android Autofill Framework for seamless login across apps.

📱 Features

• ✅ Biometric Login: Fingerprint or Face ID unlock support.
• 🔒 Encrypted Storage: Uses AES/CBC + Android Keystore to securely store usernames and passwords.
• 🧩 Autofill Service: Auto-fills credentials into external apps like browsers or login forms.
• 🖊️ Add/Edit/Delete Credentials: Full CRUD operations with database conflict handling.
• 📋 Copy Username/Password: Inline buttons to copy data to clipboard.
• 🗂️ Custom XML Layouts: Card-based UI for credentials with inline actions.

🛠 Built With

• Java – Android app logic
• Android Studio – IDE
• SQLite + AES Encryption – Secure local storage
• AndroidX Biometric Library – For biometric authentication
• Android Autofill Framework – For auto-login support
• Material Design – Modern UI components

🧾 How It Works

1. User authenticates via fingerprint or face recognition
2. Vault shows all saved credentials
3. Tap icons to copy username or password
4. Long press to Edit or Delete a credential
5. When logging into other apps, system prompts to use AccessVault autofill

---

📸 Screenshots

1. Biometric Login Screen

2. Main Page View

3. Add Credential Form

4. Saved Credential View

4. Edit Credential View

---

📁 Core Files

File	Description
LoginActivity.java	Handles biometric unlock before accessing the vault
VaultActivity.java	Main screen showing card-based credential list
AddCredentialActivity.java	UI for adding/editing credentials with validation
DBHelper.java	Manages encrypted SQLite operations
MyAutofillService.java	Implements Android Autofill Framework
AutofillHelper.java	Parses assist structures to detect fields in external apps
CredentialsAdapter.java	Binds credentials to the list view
Credential.java	Model class representing each credential

---

🧪 How to Build & Run

Requirements

• Android Studio
• Target SDK: 35 (Android U)
• Java 17+
• Physical/Virtual(From AndroidStudio) device with fingerprint/face unlock

📱 Usage

Once a user saves a credential:

1. AccessVault encrypts and stores it securely.
2. When logging into other apps, the system triggers Autofill, and AccessVault suggests saved credentials.
3. The user authenticates with biometrics to autofill securely.

📄 License

This project is licensed under the MIT License. See the LICENSE file for details.