ItemGroup is class that implements Group of Groupie
ItemGroup is like Section and improves performance for Group that contains only Item.
It is cheaper to invoke methods on a ItemGroup than a Section.
val groupAdapter =GroupAdapter<GroupieViewHolder>()
val itemGroup =ItemGroup()
groupAdapter.add(itemGroup)
val items = mutableListOf<Item<*>>()
items +=MyItem1()
items +=MyItem2()
itemGroup.update(items)
Benchmark
Below are benchmark result for reference:(Tests are run on Pixel 3 XL) Benchmark tests code
update with 100 shuffled items
class
time(micro sec)
ItemGroup
1,039
Section
36,401
update with same 100 items
class
time(micro sec)
ItemGroup
31
Section
722
Compatibility
ItemGroup version
Groupie version
1.1.2
2.2.0 ~ 2.5.1
1.2.1
2.6.0 ~
Example
ItemGroup
Section
License
Copyright 2019 scache
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.