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https://github.com/kuuuurt/multiplatform-paging
Kotlin Multiplatform library for Pagination
https://github.com/kuuuurt/multiplatform-paging
Last synced: 4 months ago
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Kotlin Multiplatform library for Pagination
- Host: GitHub
- URL: https://github.com/kuuuurt/multiplatform-paging
- Owner: kuuuurt
- License: apache-2.0
- Archived: true
- Created: 2020-03-06T09:48:56.000Z (over 4 years ago)
- Default Branch: main
- Last Pushed: 2023-10-13T04:51:16.000Z (9 months ago)
- Last Synced: 2024-01-16T19:27:10.356Z (6 months ago)
- Language: Kotlin
- Homepage:
- Size: 916 KB
- Stars: 244
- Watchers: 6
- Forks: 23
- Open Issues: 13
-
Metadata Files:
- Readme: README.md
- Changelog: CHANGELOG.md
- License: LICENSE
Lists
- awesome-kotlin-multiplatform - Multiplatform Paging - Kotlin Multiplatform library for Pagination on Android and iOS (Libraries / Utility)
- kmp-awesome - multiplatform-paging - Pagination library for KMM (Libraries / 🏗 Architecture)
- awesome-kotlin-multiplatform - kuuuurt/multiplatform-paging
README
# Multiplatform Paging
[  ](https://search.maven.org/search?q=a:multiplatform-paging)
A Kotlin Multiplatform library for pagination.
## :warning: **Important Notice**
This repository is no longer actively maintained.
If you're looking for more features or alternative solutions, check out [Cash App's Multiplatform Paging library](https://github.com/cashapp/multiplatform-paging)
## Setup
This library is used on Kotlin Multiplatform that targets Android and iOS.
Check the table below for the compatibility across versions
| Library | Kotlin | Paging |
|---------|--------| ------------- |
| 0.6.2 | 1.8.0 | 3.1.1 |
| 0.6.1 | 1.8.0 | 3.1.1 |
| 0.6.0 | 1.7.20 | 3.1.1 |
| 0.5.0 | 1.7.10 | 3.1.1 |
| 0.4.7 | 1.6.10 | 3.1.0 |
| 0.4.6 | 1.6.0 | 3.1.0 |
| 0.4.5 | 1.5.31 | 3.0.1 |
| 0.4.4 | 1.5.30 | 3.0.1 |
| 0.4.3 | 1.5.30 | 3.0.1 |
| 0.4.2 | 1.5.10 | 3.0.0 |
| 0.4.1 | 1.5.10 | 3.0.0 |
| 0.4.0 | 1.5.10 | 3.0.0 |
| 0.3.11 | 1.4.32 | 3.0.0-beta03 |
| 0.3.10 | 1.4.32 | 3.0.0-beta03 |
| 0.3.9 | 1.4.31 | 3.0.0-beta01 |
| 0.3.8 | 1.4.30 | 3.0.0-beta01 |
| 0.3.4+ | 1.4.30 | 3.0.0-alpha13 |
| 0.3.3 | 1.4.30 | 3.0.0-alpha11 |
| 0.3.2 | 1.4.21 | 3.0.0-alpha11 |
| 0.3.1 | 1.4.10 | 3.0.0-alpha07 |
| 0.3.0 | 1.4.0 | 3.0.0-alpha06 |
| 0.2.0 | 1.3.70 | 3.0.0-alpha01 |
| 0.1.+ | 1.3.70 | 2.1.1 |
| 0.1.0 | 1.3.61 | 2.1.1 |
Add the `mavenCentral` repository on your Project-level gradle
```kotlin
allprojects {
repositories {
...
mavenCentral()
}
}
```
On the module, add the library in your dependencies.
```kotlin
kotlin {
...
sourceSets["commonMain"].dependencies {
implementation("io.github.kuuuurt:multiplatform-paging:{version}")
}
}
```
On Android, make sure to add `androidx.paging:paging-runtime` as a dependency
On iOS, you have to export it on your targets
```kotlin
kotlin {
...
cocoapods {
...
framework {
...
export("io.github.kuuuurt:multiplatform-paging:{version}")
}
}
val commonMain by sourceSets.getting {
dependencies {
api("io.github.kuuuurt:multiplatform-paging:{version}")
...
}
}
}
```
## Usage
### Common
Multiplatform paging exposes paginators which you can use in your multiplatform code to have common pagination on Android and iOS.
```kotlin
class MyMultiplatformController {
private val pager = Pager(
clientScope = coroutineScope,
config = PagingConfig(
pageSize = 10,
enablePlaceholders = false // Ignored on iOS
),
initialKey = 1, // Key to use when initialized
getItems = { currentKey, size ->
val items = ... // How you will get the items (API Call or Local DB)
PagingResult(
items = items,
currentKey = currentKey,
prevKey = { _, _ -> null }, // Key for previous page, null means don't load previous pages
nextKey = { items, currentKey -> currentKey + 1 } // Key for next page. Use `items` or `currentKey` to get it depending on the pagination strategy
)
}
)
val pagingData: CommonFlow>
get() = pager.pagingData
.cachedIn(clientScope) // cachedIn from AndroidX Paging. on iOS, this is a no-op
.asCommonFlow() // So that iOS can consume the Flow
}
```
*`CommonFlow` is a helper we can use to consume `Flow` on iOS. See [`FlowHelpers`](https://github.com/kuuuurt/multiplatform-paging/blob/develop/sample/multiplatform-library/src/commonMain/kotlin/com/kuuurt/paging/sample/multiplatform/library/helpers/FlowHelpers.kt)*
### Android
On Android, multiplatform paging uses [Android Architecture Component's Paging library](https://developer.android.com/topic/libraries/architecture/paging) and exposes `pagedList` as a `Flow>` which can be observed and submitted onto the `PagedListAdapter`.
```kotlin
class MyFragment : Fragment() {
val myMultiplatformController = MyMultiplatformController()
val myPagingDataAdapter = MyPagingDataAdapter()
override fun onViewCreated(...) {
super.onViewCreated(...)
myMultiplatformController.pagingData
.onEach { myPagingDataAdapter.submitData(it) }
.launchIn(viewLifecyleOwner.lifecyclerScope)
}
}
```
### iOS
On iOS, it exposes `pagedList` as a `Flow>` which can be observed and rendered to a `UITableView`
```swift
class MyViewController UIViewController, UITableViewDelegate, UITableViewDataSource {
@IBOutlet weak var tableView: UITableView!
let myMultiplatformController = MyMultiplatformController()
private var data: [T] = []
private var count: Int = 0
override func viewDidLoad() {
super.viewDidLoad()
// setup...
myMultiplatformController.pagingData.watch { [unowned self] nullableArray in
guard let list = nullableArray?.compactMap({ $0 as? T }) else {
return
}
self.data = list
self.count = list.count
self.tableView.reloadData()
}
}
}
```
*Disclaimer: I'm not an iOS developer and this is what I was able to make of. If someone has a better example, contributions are welcome!*
### Jetpack Compose and SwiftUI
For samples using Jetpack Compose and SwiftUI, you can refer to [MortyComposeKMM](https://github.com/joreilly/MortyComposeKMM) by [joreilly](https://github.com/joreilly).
## Maintainers
- Kurt Renzo Acosta - [[email protected]](mailto:[email protected])
## Contributing
Feel free to dive in! [Open an issue](https://github.com/kuuuurt/multiplatform-paging/issues/new) or submit PRs.
## License
[Apache-2.0](LICENSE) © Kurt Renzo Acosta