如何使用基本域适配器侦听器方法确定在RealmObject更新中更改了哪些字段?
需要同时拥有范围信息和更改的实体字段信息。
fun notifyRecyclerViewOfChanges(changeSet: ChangeSet?) {
// ?
}
答案 0 :(得分:2)
您可以参考官方realm-android-adapters
了解如何将其整合在一起:
private OrderedRealmCollectionChangeListener createListener() {
return new OrderedRealmCollectionChangeListener() {
@Override
public void onChange(Object collection, OrderedCollectionChangeSet changeSet) {
if (changeSet.getState() == OrderedCollectionChangeSet.State.INITIAL) { // before Realm 5.0, this is `changeSet == null`
notifyDataSetChanged();
return;
}
// For deletions, the adapter has to be notified in reverse order.
OrderedCollectionChangeSet.Range[] deletions = changeSet.getDeletionRanges();
for (int i = deletions.length - 1; i >= 0; i--) {
OrderedCollectionChangeSet.Range range = deletions[i];
notifyItemRangeRemoved(range.startIndex, range.length);
}
OrderedCollectionChangeSet.Range[] insertions = changeSet.getInsertionRanges();
for (OrderedCollectionChangeSet.Range range : insertions) {
notifyItemRangeInserted(range.startIndex, range.length);
}
if (!updateOnModification) {
return;
}
OrderedCollectionChangeSet.Range[] modifications = changeSet.getChangeRanges();
for (OrderedCollectionChangeSet.Range range : modifications) {
notifyItemRangeChanged(range.startIndex, range.length);
}
}
};
}
如果需要字段级更改,则RealmObject需要使用RealmObjectChangeListener
拥有自己的更改侦听器,而updateOnModification
应该为false(因为您希望在视图持有者本身中处理它)