listview 滑动到底部自动加载_listview滚动到底部加载-优快云博客

本文链接：https://blog.youkuaiyun.com/woshimiaoxingren/article/details/51911699

本文介绍了一种自定义ListView的方法，通过实现AbsListView.OnScrollListener监听滚动状态来达到加载更多数据的功能。该组件允许开发者轻松地为ListView添加底部加载提示，并提供加载完成回调。

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自定义listview

public class LoadMoreListView extends ListView  implements AbsListView.OnScrollListener {
    public LoadMoreListView(Context context, AttributeSet attrs) {
        super(context, attrs);
        init(context);
    }

    public LoadMoreListView(Context context) {
        super(context);
        init(context);
    }

    private OnLoadMore loadMore;

    private int totalItemCount;
    private int lastItem;

    private boolean isLoading;
    private LayoutInflater inflater;
    View footer;

    private void init(Context context) {
        inflater = LayoutInflater.from(context);
        footer = inflater.inflate(R.layout.load_more_footer,null ,false);
        footer.setVisibility(View.GONE);
        this.addFooterView(footer);
        this.setOnScrollListener(this);
    }

    @Override
    public void onScrollStateChanged(AbsListView view, int scrollState) {
        if (totalItemCount == lastItem && scrollState==SCROLL_STATE_IDLE){
            if (!isLoading){
                isLoading = true;
                footer.setVisibility(View.VISIBLE);
                loadMore.loadMore();
            }

        }
    }

    @Override
    public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) {
        this.lastItem = firstVisibleItem+visibleItemCount;
        this.totalItemCount = totalItemCount;
    }

    public void setLoadMoreListen(OnLoadMore onLoadMore){
        this.loadMore = onLoadMore;
    }

    /**
     * 加载完成调用此方法
     */
    public void onLoadComplete(){
        footer.setVisibility(View.GONE);
        isLoading = false;

    }

    public interface  OnLoadMore{

        public void loadMore();
    }
}