Update statement in Realm android-ThrowExceptions

Exception or error:

How should i update a already existing value using realm DB in android?

I have been trying to update it but it is adding as a new value only not overwritting it

How to solve:

Another way to update an existing object with all its fields in your Realm DB is using the method realm.copyToRealmOrUpdate():

Object obj = new Object();
obj.setField1(field1);
obj.setField2(field2);
realm.beginTransaction();
realm.copyToRealmOrUpdate(obj);
realm.commitTransaction();

If your object has a Primary Key, this method will update the object automatically without duplicate objects 🙂

More info: copyToRealmOrUpdate()

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You can user insertOrUpdate method to do this.Hope this helps

  Realm.getDefaultInstance().executeTransaction(new Realm.Transaction() {
                @Override
                public void execute(Realm realm) {

                    objectToEdit.setNewValue("string");
                    realm.insertOrUpdate();
                }
            });

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