my-paging-source.kt

class MyPagingSource(private val apiService: ApiService) : PagingSource<Int, Data>() {
    override suspend fun load(params: LoadParams<Int>): LoadResult<Int, Data> {
        try {
            val pageNumber = params.key ?: 1
            val pageSize = params.loadSize
            val response = apiService.getData(pageNumber, pageSize)
            val data = response.body() ?: return LoadResult.Error(Exception("Response is null"))
            val prevKey = if (pageNumber == 1) null else pageNumber - 1
            val nextKey = if (data.isEmpty()) null else pageNumber + 1
            return LoadResult.Page(data, prevKey, nextKey)
        } catch (exception: Exception) {
            return LoadResult.Error(exception)
        }
    }
}