Question

我的片段滚动有问题。当用户到达片段末尾时，我想加载添加列表的另一部分。

片段一：

 View inflatedView = inflater.inflate(R.layout.tab1, container, false);
 list = (ListView) inflatedView.findViewById(R.id.list);
 ...
 MainActivity.Adapter adapter = new MainActivity.Adapter(getActivity().getApplicationContext(), R.layout.row, result);
 list.setAdapter(adapter);
 list.setOnScrollListener(adapter);
 list.setOnItemClickListener(new AdapterView.OnItemClickListener() {

类适配器：

public static class Adapter extends ArrayAdapter implements AbsListView.OnScrollListener {
....
@Override
public void onScrollStateChanged(AbsListView view, int scrollState) {
        Toast.makeText(getContext().getApplicationContext(), "one", Toast.LENGTH_SHORT).show();
    }

    @Override
    public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) {
        Toast.makeText(getContext().getApplicationContext(), "two", Toast.LENGTH_SHORT).show();
    }
}

当我走到页面末尾时，此功能不起作用。错误在哪里？

Answer 1

我会在列表中使用RecyclerView并在其上添加滚动侦听器。您需要在回收器视图上保留对布局管理器的引用。

private LinearLayoutManager layoutManager;
private RecyclerView.OnScrollListener recyclerViewOnScrollListener = new RecyclerView.OnScrollListener() {
    @Override
    public void onScrollStateChanged(RecyclerView recyclerView, int newState) {
        super.onScrollStateChanged(recyclerView, newState);
    }

    @Override
    public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
        super.onScrolled(recyclerView, dx, dy);
        // don't load more unless actually scrolled
        if (dx == 0 && dy == 0) {
            return;
        }
        int visibleItemCount = layoutManager.getChildCount();
        int totalItemCount = layoutManager.getItemCount();
        int firstVisibleItemPosition = layoutManager.findFirstVisibleItemPosition();
        // load more items depending on visible items and total

    }
};

setOnScrollListener不能正常工作我不知道用户何时在列表的末尾

1 个答案: