GridView左右翻页

实现分析

1、GridView的显示由列数、数据源和Item布局决定

2、当GridView所有Item布局不足以超出GridView的高度时，GridView是不可滑动的

3、那么可以根据Item的布局大小，设定一页的数据量显示，通过替换此数据源即可实现左右翻页

核心代码

// 每一页Item个数（根据实际情况修改）
private int pageItemCount = 8;
// 当前页码
private int currentPage = 1;
// 总页码
private int totalPage = 1;
// 总数据源
private List<Kge> kgeList = new ArrayList<>();
// 当前页显示的数据源
private List<Kge> currentList = new ArrayList<>();

// -------- 获取数据源 --------
kgeList.add...
// 设置当前页数据源
if (kgeList.size() > pageItemCount) {
    currentList = kgeList.subList(0, pageItemCount);
} else {
    currentList = kgeList;
}
mAdapter.resetData(currentList);

// -------- 计算总页码 --------
if (kgeList.size() % pageItemCount == 0) {
    totalPage = kgeList.size() / pageItemCount;
} else {
    totalPage = kgeList.size() / pageItemCount + 1;
}

// -------- 上下页切换 --------
//上一页
if (currentPage > 1) {
    currentList = kgeList.subList((currentPage - 2) * pageItemCount, (currentPage - 1) * pageItemCount);
    mAdapter.resetData(currentList);
    currentPage--;
}
// 下一页
if (currentPage < totalPage) {
    int nextPageSize = pageItemCount;
    if (kgeList.size() < (currentPage + 1) * pageItemCount) {
        nextPageSize = kgeList.size() - currentPage * pageItemCount;
    }
    currentList = kgeList.subList(currentPage * pageItemCount, currentPage * pageItemCount + nextPageSize);
    mAdapter.resetData(currentList);
    currentPage++;
}