Android的 - OnScrollListener的交错网格视图 [英] Android - OnScrollListener for Staggered Grid View

问题描述

请原谅我的英语，我是法国人......

Please excuse my English, I'm French...

所以，我有我的Andr​​oid应用程序的问题。 我已经整合网格视图Pinterest的风格。 我发现这个LIB：交错网格视图（ https://github.com/maurycyw/StaggeredGridView ）

So, I've got a question for my Android App. I've to integrate a grid view as Pinterest style. I found this lib : Staggered Grid View (https://github.com/maurycyw/StaggeredGridView)

这是工作的罚款，但......有没有OnScrollListener！ 我必须知道，当用户看到的最后一个项目，以装载更多。 但它不可能没有OnScrollListener！

It's work fine but... There is no OnScrollListener ! I had to know when the user see the last item, in order to load more. But it's not possible without OnScrollListener !

你有一个想法，我的问题？

Have you got an idea for my problem ?

多谢了。

推荐答案

更新：
经过测试，
呼叫 notifyDataSetChanged（）为 StaggeredGridView适配器情况下重置滚动位置为0（启动观）。
而是使用 PinterestLikeAdapterView

UPDATE:
After testing,
Calling notifyDataSetChanged() for StaggeredGridView Adapter case to reset the scroll position to 0 (Start of the Views).
Instead use PinterestLikeAdapterView

我有加 loadMoreListener 到 StaggeredGridView
步骤：
1-添加loadmore接口和booelan isLoading（在类的顶部）

I have add loadMoreListener to the StaggeredGridView
steps:
1- add a loadmore Interface and booelan isLoading (at the top of the class)

public interface OnLoadMoreListener {
    public boolean onLoadMore();
}

private boolean mIsLoading;
private OnLoadMoreListener mLoadMoreListener;

2 - 查找 trackMotionScroll 功能，的其他移动deltaY＆GT; 0
和之后的起来= FALSE; 添加

2- find trackMotionScroll function, in the else of deltaY > 0
and after the up = false; add

if (overhang <= 80) { // 80 is how nearest to the end. ZERO mean the end of list
    // scrolling down and almost reach the end of list
    if (false == mIsLoading && null != mLoadMoreListener) {
        if (false == mLoadMoreListener.onLoadMore()) {
            mIsLoading = true;
            Log.d(TAG, "loadMore");
        }
    }
}

3添加使用setListener（）和 loadComplated（）功能

public void setOnLoadMoreListener(OnLoadMoreListener onLoadMoreListener) {
    this.mLoadMoreListener = onLoadMoreListener;
}

public void loadMoreCompleated() {
    mIsLoading = false;
}

如何使用：
1 - 定义一个 loadMoreListener 在活动/片段

HOW to use:
1- define a loadMoreListener in your Activity/Fragment

private StaggeredGridView.OnLoadMoreListener loadMoreListener = new StaggeredGridView.OnLoadMoreListener() {

    @Override
    public boolean onLoadMore() {
        loading.setVisibility(View.VISIBLE);
        // load more data from internet (not in the UI thread)

        return true; // true if you have more data to load, false you dont have more data to load 
    }
};

2 - 当你做数据加载，并将其添加到适配器通话

2- when you done data loading and add it to the adapter call

private void doneLoading() {
    gridView.loadMoreCompleated();
    loading.setVisibility(View.GONE);
}

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