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# rxlist | ||
Reactive List implementation using RxJava. | ||
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`java.util.List` implementation that can notify of the events that happened with the list using Observable. | ||
This library doesn't have any dependencies except RxJava. | ||
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## Usage | ||
You can use an `RxList` either as a wrapper around any other `java.util.List` implementation or as a standalone object | ||
(in this case an `ArrayList` will be used as an implementation for a backing list). | ||
Also it's possible to enable the "item removed" notification for each item that was removed when the list gets cleared (disabled by default). | ||
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```java | ||
// ArrayList will be used as a backing list implementation. | ||
RxList<Item> items = new RxList<>(); | ||
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// Will notify of each removed item when the list is cleared. | ||
RxList<Item> items = new RxList<>(true); | ||
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// In this case the RxList will wrap the given list and enable the notifications on it. | ||
// Note: to get notified of the events you must interact with the RxList, not the wrapped list. | ||
List<Item> wrappedItems = new LinkedList<Item>(); | ||
RxList<Item> items = new RxList<>(wrappedItems); | ||
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// Will notify of each removed item when the list is cleared. | ||
List<Item> wrappedItems = new LinkedList<Item>(); | ||
RxList<Item> items = new RxList<>(wrappedItems, true); | ||
``` | ||
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After you've created the `RxList` instance you will be able to get notified of the events that happen with it. | ||
Use the `events()` method of the `RxList` to get the Observable of the `RxList`'s events: | ||
```java | ||
RxList<Item> items = new RxList<>(); | ||
items.events().subscribe(event -> System.out.println(event.type)) | ||
``` | ||
This way you can get notified of `ITEM_ADDED`, `ITEM_REMOVED`, `ITEM_CHANGED`, `ITEMS_CLEARED` events. | ||
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## Usecases | ||
`RxList` will be really useful in situations where you need to keep track of the list state | ||
and react on it's changes somehow. One of the good examples of such situation (from Android development) | ||
is the necessity to call `RecyclerView.Adapter`'s `notifyItem(Inserted/Removed/Changed)` whenever you want | ||
the changes in a list be shown to the user. Take a look at the | ||
[rxlist-binder](https://github.com/s0nerik/rxlist-binder) for a ready to use `RxList` to `RecyclerView.Adapter` binding solution. | ||
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### Installation | ||
- To use this library, add the following to your project level `build.gradle`: | ||
```gradle | ||
allprojects { | ||
repositories { | ||
maven { url "https://jitpack.io" } | ||
} | ||
} | ||
``` | ||
- Add this to your app's `build.gradle`: | ||
```gradle | ||
compile 'com.github.s0nerik:rxlist:{latest version}' | ||
``` | ||
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### License | ||
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``` | ||
Copyright 2016 Alex Isaienko (s0nerik) | ||
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. | ||
``` |