RecyclerView将中心项目对齐到中心后如何获取中心项目? [英] How to get the center item after RecyclerView snapped it to center?

问题描述

我正在实现水平RecyclerView，该水平RecyclerView可以在滚动后将项目对齐到中心，例如Google play App水平列表. 这是评论.

I'm implementing a horizontal RecyclerView that snap items to center after scrolling, like Google play App horizontal lists. This is a review.

我的代码如下:

MainMenuAdapter mainMenuAdapter = new MainMenuAdapter(this, mDataset);

final LinearLayoutManager layoutManagaer = new LinearLayoutManager(this, LinearLayoutManager.HORIZONTAL, false);

RecyclerView mainMenu = (RecyclerView) findViewById(R.id.main_menu);
mainMenu.setLayoutManager(layoutManagaer);
mainMenu.setAdapter(mainMenuAdapter);

final SnapHelper snapHelper = new LinearSnapHelper();
snapHelper.attachToRecyclerView(mainMenu);     

在RecyclerView对齐中心后，如何获取中心项(位置)?没有为此提供任何侦听器的方法吗? 另外，当触摸项目视图时，我想将其对齐.我该怎么办?

How I can get the center item (position) after RecyclerView snapped it to center? Isn't there any listener implementation for this? Also, when an item view be touched, I want to snap it to center. How can I do this?

推荐答案

如果您需要View，可以致电

if you need the View, you can call

 View view =  snapHelper.findSnapView(layoutManagaer);

一旦有了View，就应该能够获得该View在数据集上的位置.例如使用

once you have the View, you should be able to get the position on the dataset for that View. For instance using

   mainMenu.getChildAdapterPosition(view)

这篇关于RecyclerView将中心项目对齐到中心后如何获取中心项目?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！