Realm Transaction Block

addPerson.java

 public void addPerson() {
        final Realm realm = Realm.getDefaultInstance();
        
        //It automatically handles begin/commit, and cancel if an error happens
        realm.executeTransactionAsync(new Realm.Transaction() {
            @Override
            public void execute(Realm realm) {
                    Person p = realm.createObject(City.class);
                    p.setId("00002");
                    c.setName("Steve Jobs");
            }
        }, new Realm.Transaction.OnSuccess() {
            @Override
            public void onSuccess() {
                realm.close();
            }
        }, new Realm.Transaction.OnError() {
            @Override
            public void onError(Throwable error) {
                Log.e(TAG, error.getMessage());
                realm.close();
            }
        });
    }