Android Realm

1. BaseApplication (onCreate)
		Realm.init(this);

        Realm realm = Realm.getDefaultInstance();

//      User user = realm.createObject(User.class); // Managed Object
        final User user = new User(); // UnManaged Object
        user.setFirstname("John");
        user.setLastname("Doe");

        realm.executeTransaction(new Realm.Transaction(){

            @Override
            public void execute(Realm realm) {
                realm.insert(user);
            }
        });

2. MainActivity
@OnClick(R.id.btnGetRealmData)
    public void showRealmData(){
        Realm realm = Realm.getDefaultInstance();
        realm.executeTransaction(new Realm.Transaction() {
            @Override
            public void execute(Realm realm) {
                User user = realm.where(User.class)
                                 .findFirst();

                tvShowPreference.setText(user.getFirstname());
            }
        });
    }