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我有一个水平布局管理器和 RecylerView。从那以后，我通过设置非常高的 itemCount 并从中间开始制作了一个轮播。然后为了实现捕捉，我按照http://www.plattysoft.com/2015/06/16/snapping-items-on-a-horizo ​​ntal-list/ 上的指南进行操作

Usually snapping works great but there are filters for the list (latest, most linked etc.) which when selected reload the list with new items.

如果列表朝正方向滚动（从右向左滑动），那么在重新加载后一切都很好。但是如果它在负方向滚动，那么在重新加载后它会捕捉到错误的位置（填充的长度）。

我尝试记录计算中使用的所有参数，但它们似乎是相同的，所以我不知道是什么原因造成的。

活动如下所示：

private RecyclerView myList;
private List<myItem> emptyList;
private myAdapter myAdapter;
final LinearLayoutManager layoutManager = new LinearLayoutManager(this,LinearLayoutManager.HORIZONTAL,false);
Integer allPixels;

protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    myAdapter = new myAdapter(this, emptyList);
    myList.setAdapter(myAdapter);
    myList.setLayoutManager(layoutManager);
    myList.setHasFixedSize(true);
    myList.addOnScrollListener(new RecyclerView.OnScrollListener() {

    @Override
    public void onScrollStateChanged(RecyclerView recyclerView, int newState) {
        super.onScrollStateChanged(recyclerView, newState);
        synchronized (this) {
            if (newState == RecyclerView.SCROLL_STATE_IDLE) {
                calculatePositionAndScroll(recyclerView);            
            }
        }

    }

    @Override
    public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
        super.onScrolled(recyclerView, dx, dy);
        allPixels += dx;
    }
});

// get latest items
new getItems().execute();
}

// async task
public class getItems extends AsyncTask<ContentValues, Void, List<myItem>> {

    protected void onPostExecute(List<myItem> result) {

        myAdapter = new myAdapter(getApplicationContext(), result);
        myList.swapAdapter(myAdapter, false);

        allPixels = 0;
        myList.scrollToPosition((100000 / 2));

        calculatePositionAndScroll(myList);

    }
}

private void calculatePositionAndScroll(RecyclerView recyclerView) {    
    int expectedPosition = Math.round((allPixels + padding - itemWidth) / itemWidth);

    scrollListToPosition(recyclerView, expectedPosition);

}

private void scrollListToPosition(RecyclerView recyclerView, int expectedPosition) {
    float targetScrollPos;

    targetScrollPos = (expectedPosition * itemWidth) + itemWidth - padding;

    float missingPx = targetScrollPos - allPixels;
    Log.e("VARS", "expectedPosition: "+expectedPosition+" | itemWidth: "+itemWidth+" | padding: "+padding+
            " | allPixels: "+allPixels+" | targetPos: "+targetScrollPos+" missingPx: "+missingPx);
    if (missingPx > 5 || missingPx < -5) {
        recyclerView.smoothScrollBy((int) missingPx, 0);
    }

}

通常项目应如下所示：

但是在向左滚动并重新加载新列表后，如果像这样移动它：

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