提取了帖子，但是将旧帖子替换为较新的帖子，即使它没有滚动到末尾，也下载了新列表，我想获取一页，而当我滚动到结束回收者视图时，我想要获取第2页，等等。我也想显示上一页
我的活动：
class MainActivity : AppCompatActivity() {
lateinit var layoutManager: LinearLayoutManager
var page = 0
var isLoading = false
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_main)
recyclerViewProducts.setHasFixedSize(true)
layoutManager = LinearLayoutManager(this)
recyclerViewPost.layoutManager = layoutManager
getData(page)
recyclerViewPost.addOnScrollListener(object : RecyclerView.OnScrollListener() {
override fun onScrolled(recyclerView: RecyclerView, dx: Int, dy: Int) {
val visibleItemCount = layoutManager.childCount
val pastVisibleItem = layoutManager.findFirstCompletelyVisibleItemPosition()
val total = 10
if (!isLoading) {
if ((visibleItemCount + pastVisibleItem) == total) {
page++
getData(page)
}
}
super.onScrolled(recyclerView, dx, dy)
}
})
}
private fun getData(page: Int){
Api.getApi().getPosts(page).enqueue(object : Callback<PostList> {
override fun onResponse(
call: Call<PostList>, response: Response<PostList>
) {
showData(response.body()!!)
}
override fun onFailure(call: Call<PosttList>, t: Throwable) {
}
})
}
private fun showData(products: ProductListResponse) {
recyclerViewProducts.apply {
adapter = ProductsAdapter(products, this@MainActivity)
}
}
感谢帮助
