🧑‍💻 Android Login & Signup App (Kotlin)

A simple Android app built using Kotlin, demonstrating user Signup, Login, Validation, and Session Management using SharedPreferences.

🚀 Features

✅ User Registration (Signup)

• Stores user details like Name, Email, and Password in SharedPreferences.
• Validates all inputs before saving.

✅ User Login

• Checks user credentials against saved data.
• Prevents login if email or password is incorrect.
• Redirects to Welcome Screen on successful login.

✅ Session Management

• If the user is already logged in, the app directly opens the WelcomeActivity (skipping login screen).
• Session persists until the user logs out.

✅ Logout Functionality

• Clears all saved session data.
• Redirects user back to login screen.

✅ Input Validation

• Ensures name, email, and password are properly entered.
• Validates email format and password length.
• Displays user-friendly Toast messages for errors.

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🧩 Tech Stack

• Language: Kotlin
• IDE: Android Studio
• Storage: SharedPreferences
• Architecture: Simple Activity-based navigation
• UI Layouts: XML using LinearLayout

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🧠 App Flow

1. MainActivity (Signup) → User enters name, email, and password → Data validated and saved in SharedPreferences

2. LoginActivity → User enters credentials → Validates and compares with SharedPreferences → If valid → navigates to WelcomeActivity

3. WelcomeActivity → Displays saved user details (Name & Email) → Provides “Logout” button to clear the session

4. CommonUtils.kt → Contains reusable functions like showToast() and checkValidation()

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⚙️ How to Run

1. Clone the repository:

   git clone https://github.com/jainabhishek2505/SharedPrefrenceUssingSaveDetaiils.git

2. Open the project in Android Studio

3. Sync Gradle and run the app on an emulator or a real device

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📦 Apk Url

1. Install the app on your phone using this URL: https://drive.google.com/file/d/1Hl5sJHsmP2cnhCvgS6G5Mf18E9QKI0hs/view?usp=sharing

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💡 Author

Abhishek Jain 💬 Android Developer | Kotlin | Java