// Save preferences

SharedPreferences preferences = this.getSharedPreferences("UserDetails", Activity.MODE_PRIVATE);
        Editor preferenceEditor = preferences.edit();
        preferenceEditor.putString("Username", "vikas");
        preferenceEditor.putString("Password", "patidar");
        preferenceEditor.commit();

//Retrieve preferences
SharedPreferences preferences = this.getSharedPreferences("UserDetails", Activity.MODE_PRIVATE);
        String Username = preferences .getString("Username",null);
        String Password = preferences .getString("Password",null);