使用Android分页库在FragmentPagerAdapter中显示ViewPager中相同2个加载片段的过滤结果

implementation 'androidx.paging:paging-runtime:3.0.0'

class MyDataSource : PagingSource<Int, MyItem>() {
    override suspend fun load(params: LoadParams<Int>): LoadResult<Int, MyItem> {
        val pageNumber = params.key ?: 0
        val pageSize = params.loadSize

        // 根据过滤条件获取过滤后的数据
        val filteredData = fetchDataWithFilter(pageNumber, pageSize)

        // 返回加载结果
        return LoadResult.Page(
            data = filteredData,
            prevKey = if (pageNumber > 0) pageNumber - 1 else null,
            nextKey = if (filteredData.isNotEmpty()) pageNumber + 1 else null
        )
    }
}

val pagingConfig = PagingConfig(
    pageSize = 20,
    enablePlaceholders = false
)

val pager = Pager(
    config = pagingConfig,
    pagingSourceFactory = { MyDataSource() }
)

val pagingDataFlow: Flow<PagingData<MyItem>> = pager.flow

class MyFragment : Fragment() {
    private val adapter = MyPagingAdapter()

    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
        super.onViewCreated(view, savedInstanceState)

        val viewPager: ViewPager2 = view.findViewById(R.id.viewPager)
        viewPager.adapter = adapter

        lifecycleScope.launch {
            pagingDataFlow.collectLatest { pagingData ->
                adapter.submitData(pagingData)
            }
        }
    }
}

class MyPagingAdapter : PagingDataAdapter<MyItem, MyViewHolder>(MyItemDiffCallback()) {
    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): MyViewHolder {
        val inflater = LayoutInflater.from(parent.context)
        val view = inflater.inflate(R.layout.item_my, parent, false)
        return MyViewHolder(view)
    }

    override fun onBindViewHolder(holder: MyViewHolder, position: Int) {
        val item = getItem(position)
        holder.bind(item)
    }
}

class MyViewHolder(itemView: View) : RecyclerView.ViewHolder(itemView) {
    fun bind(item: MyItem?) {
        // 绑定数据到视图
    }
}