https://github.com/musichin/reactivelivedata
Transformation functions for LiveData
https://github.com/musichin/reactivelivedata
android android-library androidx architecture-components java kotlin livedata transform-functions
Last synced: about 2 months ago
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Transformation functions for LiveData
- Host: GitHub
- URL: https://github.com/musichin/reactivelivedata
- Owner: musichin
- License: mit
- Created: 2017-11-08T19:54:16.000Z (almost 8 years ago)
- Default Branch: main
- Last Pushed: 2023-12-01T11:34:20.000Z (almost 2 years ago)
- Last Synced: 2025-08-17T10:44:27.532Z (about 2 months ago)
- Topics: android, android-library, androidx, architecture-components, java, kotlin, livedata, transform-functions
- Language: Kotlin
- Homepage:
- Size: 528 KB
- Stars: 78
- Watchers: 2
- Forks: 3
- Open Issues: 2
-
Metadata Files:
- Readme: README.md
- License: LICENSE
Awesome Lists containing this project
README
# Reactive LiveData
[](http://kotlinlang.org)
[](https://github.com/musichin/ReactiveLiveData/actions/workflows/ci.yml)
[](https://codecov.io/gh/musichin/ReactiveLiveData)
[](https://search.maven.org/artifact/de.musichin.reactivelivedata/reactivelivedata)
This library provides basic transformation functions for your [`LiveData`](https://developer.android.com/topic/libraries/architecture/livedata.html) objects.
## Functions
* `map`
* `switchMap`
* `switchLatest`
* `filter`
* `filterNotNull`
* `distinct`
* `distinctUntilChanged`
* `merge`
* `combineLatest`
* `startWith`
* `first`
* `take`
* `takeUntil`
* `takeWhile`
* `buffer`
* `cast`
* and more...
## Usage
### `filter`
```kotlin
val source: LiveData = // 1, 2, 3, 4, 5, 6, 7, 8, 9, 10
source.filter { it % 2 == 1 }.observe(this) {
println(it) // 1, 3, 5, 7, 9
}
```
### `distinct`
```kotlin
val source: LiveData = // 1, 2, 1, 3, 2, 4, 1, 3, 2, 5
source.distinct().observe(this) {
println(it) // 1, 2, 3, 4, 5
}
```
### `merge`
```kotlin
val source1: LiveData = // 1, 2, 3,
val source2: LiveData = // a, b, c,
listOf(source1, source2).merge().observe(this) { value ->
println(value) // a, 1, b, 2, c, 3
}
```
## Binaries
```groovy
repositories {
mavenCentral()
}
dependencies {
implementation 'de.musichin.reactivelivedata:reactivelivedata:x.y.z'
}
```
## Contributing
Contributors are more than welcome. Just upload a PR with a description of your changes.
## Issues or feature requests?
File github issues for anything that is unexpectedly broken.
## License
MIT License
Copyright (c) 2017 Anton Musichin
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.