具有预定义项的Listview，在到达结束项后，它应该从android中的第一项开始

我正在寻找10个项目的Listview。如果在第10项之后出现向下滚动，则应从开始处开始向下滚动

所有10项都是固定的，我不会动态添加它们

---

Item1

，

Item2

<代码>项目10下一个滚动

项目1

，

项目2

，

项目3

您可以使用

endlesscrollstener

执行此任务

import android.widget.AbsListView; 

public abstract class EndlessScrollListener implements AbsListView.OnScrollListener {
    // The minimum number of items to have below your current scroll position
    // before loading more.
    private int visibleThreshold = 5;
    // The current offset index of data you have loaded
    private int currentPage = 0;
    // The total number of items in the dataset after the last load
    private int previousTotalItemCount = 0;
    // True if we are still waiting for the last set of data to load.
    private boolean loading = true;
    // Sets the starting page index
    private int startingPageIndex = 0;

    public EndlessScrollListener() {
    }

    public EndlessScrollListener(int visibleThreshold) {
        this.visibleThreshold = visibleThreshold;
    }

    public EndlessScrollListener(int visibleThreshold, int startPage) {
        this.visibleThreshold = visibleThreshold;
        this.startingPageIndex = startPage;
        this.currentPage = startPage;
    }


    @Override
    public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) 
        {
        // If the total item count is zero and the previous isn't, assume the
        // list is invalidated and should be reset back to initial state
        if (totalItemCount < previousTotalItemCount) {
            this.currentPage = this.startingPageIndex;
            this.previousTotalItemCount = totalItemCount;
            if (totalItemCount == 0) { this.loading = true; } 
        }
        // If it's still loading, we check to see if the dataset count has
        // changed, if so we conclude it has finished loading and update the current page
        // number and total item count.
        if (loading && (totalItemCount > previousTotalItemCount)) {
            loading = false;
            previousTotalItemCount = totalItemCount;
            currentPage++;
        }

        // If it isn't currently loading, we check to see if we have breached
        // the visibleThreshold and need to reload more data.
        // If we do need to reload some more data, we execute onLoadMore to fetch the data.
        if (!loading && (firstVisibleItem + visibleItemCount + visibleThreshold) >= totalItemCount ) {
            loading = onLoadMore(currentPage + 1, totalItemCount);
        }
    }

    // Defines the process for actually loading more data based on page
    // Returns true if more data is being loaded; returns false if there is no more data to load.
    public abstract boolean onLoadMore(int page, int totalItemsCount);

    @Override
    public void onScrollStateChanged(AbsListView view, int scrollState) {
        // Don't take any action on changed
    }
}

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首先，重写

getCount（）

以返回一个巨大的数字：

@Override
public int getCount() {
    return Integer.MAX_VALUE;
}

这并不是无限滚动，但我非常怀疑是否有任何用户会滚动超过20亿个项目

然后，在

getView（）

中，可以使用模运算符将索引编入列表：

@Override
public View getView(int position, View convertView, ViewGroup parent) {
    position = (position % 10); // change 10 to whatever fixed number of items you have 
    ...
}

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适配器的其余部分应该像您创建的任何其他ListView适配器一样写入。

当它达到10时，作为第11项，它应该显示第1项。那么它将是永无止境的列表视图吗？这就是您想要实现的目标吗？是的，在第10项之后，第11项应该是第一项，并且应该是无尾项请显示10项的适配器代码。

@Override
public View getView(int position, View convertView, ViewGroup parent) {
    position = (position % 10); // change 10 to whatever fixed number of items you have 
    ...
}