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android: add paging setup

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Signed-off-by: Harsh Shandilya <me@msfjarvis.dev>
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Harsh Shandilya 2021-06-05 03:36:13 +05:30
parent 46ef1d5567
commit 9c451ae57b
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2 changed files with 32 additions and 7 deletions
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29
android/src/main/java/dev/msfjarvis/claw/android/paging/LobstersPagingSource.kt Normal file
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package dev.msfjarvis.claw.android.paging
import androidx.paging.PagingSource
import androidx.paging.PagingState
import dev.msfjarvis.claw.api.model.LobstersPost
class LobstersPagingSource(
private val getMorePosts: suspend (Int) -> List<LobstersPost>,
) : PagingSource<Int, LobstersPost>() {
override suspend fun load(params: LoadParams<Int>): LoadResult<Int, LobstersPost> {
return try {
val page = params.key ?: 1
val posts = getMorePosts(page)
LoadResult.Page(
data = posts,
prevKey = if (page == 1) null else page - 1,
nextKey = page.plus(1)
)
} catch (e: Exception) {
LoadResult.Error(e)
}
}
override fun getRefreshKey(state: PagingState<Int, LobstersPost>): Int {
return state.pages.size + 1
}
}