Untitled

### Key Components of Logout Logic

1. **Session Management**: Use `SharedPreferences` to manage user session data.
2. **User Feedback**: Provide feedback to the user upon successful logout.
3. **Data Cleanup**: Clear any user-specific data or cached information when logging out.

### Step-by-Step Implementation

#### 1. Creating SharedPreferences for Session Management

First, create methods to save and check user login status using `SharedPreferences`.

```java
import android.content.Context;
import android.content.SharedPreferences;

public class SessionManager {
    private SharedPreferences sharedPreferences;
    private SharedPreferences.Editor editor;
    private static final String PREF_NAME = "user_session";
    private static final String IS_LOGGED_IN = "is_logged_in";

    public SessionManager(Context context) {
        sharedPreferences = context.getSharedPreferences(PREF_NAME, Context.MODE_PRIVATE);
        editor = sharedPreferences.edit();
    }

    public void createLoginSession() {
        editor.putBoolean(IS_LOGGED_IN, true);
        editor.apply();
    }

    public void logout() {
        editor.clear();
        editor.apply();
    }

    public boolean isLoggedIn() {
        return sharedPreferences.getBoolean(IS_LOGGED_IN, false);
    }
}
```

#### 2. Implementing Logout Logic in MainActivity

In your `MainActivity`, you can use the `SessionManager` class to manage login sessions and handle the logout operation.

```java
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;
import androidx.appcompat.app.AppCompatActivity;

public class MainActivity extends AppCompatActivity {

    private Button logoutButton;
    private Button loginButton;
    private SessionManager sessionManager;

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

        sessionManager = new SessionManager(this);
        logoutButton = findViewById(R.id.logoutButton);
        loginButton = findViewById(R.id.loginButton);

        // Check login status
        if (sessionManager.isLoggedIn()) {
            showLogoutButton();
        } else {
            showLoginButton();
        }

        // Set up button click listeners
        logoutButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                performLogout();
            }
        });

        loginButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                performLogin(); // Replace with actual login logic
            }
        });
    }

    private void performLogin() {
        // Simulate login process and create a session
        sessionManager.createLoginSession();
        Toast.makeText(this, "Logged in successfully", Toast.LENGTH_SHORT).show();
        showLogoutButton();
    }

    private void performLogout() {
        // Logout logic
        sessionManager.logout();
        Toast.makeText(this, "Logged out successfully", Toast.LENGTH_SHORT).show();
        showLoginButton();
    }

    private void showLogoutButton() {
        logoutButton.setVisibility(View.VISIBLE);
        loginButton.setVisibility(View.GONE);
    }

    private void showLoginButton() {
        logoutButton.setVisibility(View.GONE);
        loginButton.setVisibility(View.VISIBLE);
    }
}
```

### Explanation of the Code
1. **SessionManager Class**: 
   - Manages user sessions using `SharedPreferences`.
   - Provides methods to create a login session, check if the user is logged in, and logout (clearing saved data).

2. **MainActivity Class**:
   - Checks the login status on creation using `sessionManager.isLoggedIn()`.
   - The `performLogin()` method simulates logging in by creating a session, which can be replaced with actual authentication logic.
   - The `performLogout()` method calls the `logout()` method from the `SessionManager`, which clears the session data and provides user feedback via a Toast message.
   - The visibility of the login/logout buttons is updated based on the login status.

### Conclusion

This professional logout logic ensures that user sessions are managed efficiently, provides feedback to the user, and cleans up session data effectively. You can extend this logic by adding more features, such as redirecting users to a login screen after logout or integrating with a backend service for user authentication.