Question

我将用户登录详细信息保存到我的SharedPreferences文件中。问题是当我尝试清除ShredPreferences时，细节不清楚。当下一个用户登录时，他的详细信息不会显示。

这是我的代码： -

Save.java

sessionManager.createLoginSession(username, deviceId,  name );

SessionManagement.java

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 = "UserDetails";

    public SessionManagement(Context context)
        {
            this._context = context;
            pref = _context.getSharedPreferences(PREF_NAME, PRIVATE_MODE);
            editor = pref.edit();
        }

        public void createLoginSession(String emailId, String deviceid,String usersname)
        {
            // Storing login value as TRUE
            editor.putBoolean(IS_LOGIN, true);

            editor.putBoolean(KEY_DEVICEREGISTERED, true);
            editor.putString(KEY_EMAILID, emailId);

            editor.putString(KEY_DEVICEiD, deviceid);

            editor.putString(KEY_USERSNAME, usersname);


            // commit changes
            editor.commit();
        }

        /**
         * Get stored session data
         * */
        public HashMap<String, String> getUserDetails()
        {
            HashMap<String, String> user = new HashMap<String, String>();

            user.put(KEY_EMAILID, pref.getString(KEY_EMAILID, null));

            user.put(KEY_DEVICEiD, pref.getString(KEY_DEVICEiD, null));

            user.put(KEY_USERSNAME, pref.getString(KEY_USERSNAME, null));


            // return user
            return user;
        }
        /**
         * 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, Login.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);
            }

        }

       // This function clears all session data and redirect the user to LoginActivity
        /**
             * Clear session details
             * */
            public void logoutUser()
            {
                // Clearing all data from Shared Preferences
                //editor.clear();



                editor.remove(KEY_DEVICEiD);
                editor.remove(KEY_EMAILID);

                editor.remove(KEY_USERSNAME);

                editor.commit();

                // After logout redirect user to Loing Activity
                Intent i = new Intent(_context, Login.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);
            }

            public boolean isLoggedIn()
            {
                return pref.getBoolean(IS_LOGIN, false);
            }

Logout.java

SessionManagement session = new SessionManagement(getApplicationContext());
        session.logoutUser();

结束（）;

Answer 1

我正在使用结构

public void logoutUser() {
    // Clearing all data from Shared Preferences
    editor.putBoolean(IS_LOGIN, false);
    editor.putString(KEY_TOKEN, "");
    editor.putString(KEY_EMAIL, "");
    editor.commit();
}

Answer 2

 /**
         * Clear session details
         * */
        public void logoutUser(){

            // Clearing all user data from Shared Preferences
            editor.clear();
            editor.commit();


            // After logout redirect user 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);
        }

Try the above code.Hope it will work.

清除所有SharedPreferences android

2 个答案: