Session Manager

Use this class to store and delete sessions.It is also used to check if the user is already logged in or session has already expired.The infomation set during login if true are stored as session using a private key.

Android supports the usage of the _SharedPreferences _class for persisting key-value pairs (preferences)of primitive data types in the Android file system.

ThePreferenceManagerclass provides methods to get access to preferences stored in a certain file. The following code shows how to access preferences from a certain file

public class SessionManager {
    // Shared Preferences
    SharedPreferences pref;

    // Editor for Shared preferences
    Editor editor;

    // Context
    Context _context;

    // Shared pref mode
    int PRIVATE_MODE = 0;

    // Sharedpref file name
    private static final String PREF_NAME = "LoginPref";

    // All Shared Preferences Keys
    private static final String IS_LOGIN = "IsLoggedIn";

    // Key of Sessions(make variable public to access from outside)
    public static final String KEY_EMAIL = "email";
    public static final String KEY_PASSWORD = "password";
    public static final String KEY_ROLE = "role";
    public static final String KEY_NAME = "name";
    public static final String KEY_TOKEN = "token";

    // Constructor
    public SessionManager(Context context) {
        this._context = context;
        pref = _context.getSharedPreferences(PREF_NAME, PRIVATE_MODE);
        editor = pref.edit();
    }
    /**
     * Create login session
     * */
    public void createLoginSession(String name, String email, String password,String role, String token){
        // Storing login value as TRUE
        editor.putBoolean(IS_LOGIN, true);

        // Storing name in pref
        editor.putString(KEY_NAME, name);
        // Storing email in pref
        editor.putString(KEY_EMAIL, email);
        // Storing password in pref
        editor.putString(KEY_PASSWORD, password);
        // Storing role in pref
        editor.putString(KEY_ROLE, role);
        // Storing token in pref
        editor.putString(KEY_TOKEN, token);

        // commit changes
        editor.commit();
    }
    /**
     * Check login method wil check user login status
     * If false it will redirect user to login page
     * Else won't do anything
     * */
    public void checkLogin(){
        // Check login status
        if(!this.isLoggedIn()){
            // user is not logged in redirect him to Login Activity
            Intent i = new Intent(_context, LoginActivity.class);
            // Closing all the Activities
            i.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);

            // Add new Flag to start new Activity
            i.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);

            // Staring Login Activity
            _context.startActivity(i);
        }

    }
    /**
     * Get stored session data
     * */
    public HashMap<String, String> getUserDetails(){
        HashMap<String, String> user = new HashMap<String, String>();
        // user name
        user.put(KEY_NAME, pref.getString(KEY_NAME, null));

        // user email id
        user.put(KEY_EMAIL, pref.getString(KEY_EMAIL, null));

        // user password
        user.put(KEY_PASSWORD, pref.getString(KEY_PASSWORD, null));

        // user role
        user.put(KEY_ROLE, pref.getString(KEY_ROLE, null));

        // session token
        user.put(KEY_TOKEN, pref.getString(KEY_TOKEN, null));


        // return user
        return user;
    }
    /**
     * Clear session details
     * */
    public void logoutUser(){
        // Clearing all data from Shared Preferences
        editor.clear();
        editor.commit();

        // After logout redirect user to Loing Activity
        Intent i = new Intent(_context, LoginActivity.class);
        // Closing all the Activities
        i.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);

        // Add new Flag to start new Activity
        i.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);

        // Staring Login Activity
        _context.startActivity(i);
    }
    /**
     * Quick check for login
     * **/
    // Get Login State
    public boolean isLoggedIn(){
        return pref.getBoolean(IS_LOGIN, false);
    }
}