Tips for using realm

Realm Tips

1. Using realm.executeTransaction instead realm.beginTransaction and realm.commitTransaction because executeTransaction() automatically handles calling realm.cancelTransaction() in case an exception is thrown.
//Using retrolambda
try(Realm realmInstance = Realm.getDefaultInstance()) {
    realmInstance.executeTransaction((realm) -> realm.insertOrUpdate(dog));
}
2. Close Realm after opening Realm instances
3. A tip: you should open your first Realm instance on the UI thread only after the first Activity has been created, just to be safe from context.getFilesDir() == null
4. using realmREsults.asObservable() or Observable.just(realm.where(...)).find*()
5. Using findAllSorted() instead of findAll.sort()
6. Using @Index to speed up
7. GetData INSIDE transaction
try(Realm realm = Realm.getDefaultInstance()) {
    realm.executeTransaction(inRealm -> { // YES
        final RealmResults<Dog> dogs = inRealm.where(Dog.class).findAll(); // YES
        for(Dog dog : dogs) { // YES
           //...
        }
    });
}
8. Using RealmREcyclerViewAdapter and RecyclerView

#reference: Medium, https://github.com/miquelbeltran/android-rxjava-realm-cache/blob/master/app/src/main/java/work/beltran/rxrealmcache/MainActivity.java