实现 div 横向左右箭头滚动效果
Posted
tags:
篇首语:本文由小常识网(cha138.com)小编为大家整理,主要介绍了实现 div 横向左右箭头滚动效果相关的知识,希望对你有一定的参考价值。
参考技术A 技术:layui-tab 样式、jquery 的 scrollLeftAndroid两种方式实现横向滚动图标+指示器
啊哈,先上应用效果图,符合你的需求,你再继续看这篇博文哈~
类型1 :RecyclerView实现非分页效果的左右滑动
类型2 :ViewPager+RecyclerView实现分页效果的左右滑动
GitHub地址 : https://github.com/xiaoyaomeng/TopicView/tree/master
类型1:RecyclerView实现非分页效果的左右滑动
private void initTypeRecyclerView(int rowNum)
final RecyclerView topicRecyclerView = findViewById(R.id.topicRecyclerView);
final View mIndicatorLayout = findViewById(R.id.parent_layout);
final View mIndicatorView = findViewById(R.id.main_line);
TopicAdapter topicAdapter = new TopicAdapter(getApplicationContext(), mTopicData);
topicAdapter.setOnItemClickListener(this);
topicRecyclerView.setAdapter(topicAdapter);
GridLayoutManager gridLayoutManager = new GridLayoutManager(getApplicationContext(), rowNum);
gridLayoutManager.setOrientation(LinearLayoutManager.HORIZONTAL);
topicRecyclerView.setLayoutManager(gridLayoutManager);
topicRecyclerView.addOnScrollListener(new RecyclerView.OnScrollListener()
@Override
public void onScrollStateChanged(@NonNull RecyclerView recyclerView, int newState)
super.onScrollStateChanged(recyclerView, newState);
@Override
public void onScrolled(@NonNull RecyclerView recyclerView, int dx, int dy)
super.onScrolled(recyclerView, dx, dy);
//当前RcyclerView显示区域的高度。水平列表屏幕从左侧到右侧显示范围
int extent = recyclerView.computeHorizontalScrollExtent();
//整体的高度,注意是整体,包括在显示区域之外的。
int range = recyclerView.computeHorizontalScrollRange();
//已经滚动的距离,为0时表示已处于顶部。
int offset = recyclerView.computeHorizontalScrollOffset();
//计算出溢出部分的宽度,即屏幕外剩下的宽度
float maxEndX = range - extent;
//计算比例
float proportion = offset / maxEndX;
int layoutWidth = mIndicatorLayout.getWidth();
int indicatorViewWidth = mIndicatorView.getWidth();
//可滑动的距离
int scrollableDistance = layoutWidth - indicatorViewWidth;
//设置滚动条移动
mIndicatorView.setTranslationX(scrollableDistance * proportion);
);
类型2 :ViewPager+RecyclerView实现分页效果的左右滑动
private void initTypeViewPager(int rowNum, int columnNum)
final ViewPager topicViewPager = findViewById(R.id.topicViewPager);
final MagicIndicator topicIndicator = findViewById(R.id.topicIndicator);
//1.根据数据的多少来分页,每页的数据为rw
int singlePageDatasNum = rowNum * columnNum; //每个单页包含的数据量:2*4=8;
int pageNum = mTopicData.size() / singlePageDatasNum;//算出有几页菜单:20%8 = 3;
if (mTopicData.size() % singlePageDatasNum > 0) pageNum++;//如果取模大于0,就还要多一页出来,放剩下的不满项
ArrayList<RecyclerView> mList = new ArrayList<>();
for (int i = 0; i < pageNum; i++)
RecyclerView recyclerView = new RecyclerView(getApplicationContext());
GridLayoutManager gridLayoutManager = new GridLayoutManager(getApplicationContext(), columnNum);
recyclerView.setLayoutManager(gridLayoutManager);
int fromIndex = i * singlePageDatasNum;
int toIndex = (i + 1) * singlePageDatasNum;
if (toIndex > mTopicData.size()) toIndex = mTopicData.size();
//a.截取每个页面包含数据
ArrayList<TopicBean> menuItems = new ArrayList<TopicBean>(mTopicData.subList(fromIndex, toIndex));
//b.设置每个页面的适配器数据
TopicAdapter menuAdapter = new TopicAdapter(getApplicationContext(), menuItems);
menuAdapter.setOnItemClickListener(this);
//c.绑定适配器,并添加到list
recyclerView.setAdapter(menuAdapter);
mList.add(recyclerView);
//2.ViewPager的适配器
HomeTopicPagerAdapter menuViewPagerAdapter = new HomeTopicPagerAdapter(mList);
topicViewPager.setAdapter(menuViewPagerAdapter);
//3.动态设置ViewPager的高度,并加载所有页面
int height = dp2px(getApplicationContext(), 76.0f);//这里的80为MainMenuAdapter中布局文件高度
LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT, mTopicData.size() <= columnNum ? height : height * rowNum);
topicViewPager.setLayoutParams(layoutParams);
topicViewPager.setOffscreenPageLimit(pageNum - 1);
//4.创建指示器
CommonNavigator commonNavigator = new CommonNavigator(getApplicationContext());
commonNavigator.setAdjustMode(true);
final int finalPageNum = pageNum;
commonNavigator.setAdapter(new CommonNavigatorAdapter()
@Override
public int getCount()
return finalPageNum;
@Override
public IPagerTitleView getTitleView(Context context, int index)
return new DummyPagerTitleView(context);
@Override
public IPagerIndicator getIndicator(Context context)
LinePagerIndicator indicator = new LinePagerIndicator(context);
indicator.setMode(LinePagerIndicator.MODE_EXACTLY);
indicator.setLineHeight(UIUtil.dip2px(context, 3));//就是指示器的高
indicator.setLineWidth(UIUtil.dip2px(context, 66 / finalPageNum));//就是指示器的宽度,然后通过页数来评分
indicator.setRoundRadius(UIUtil.dip2px(context, 3));
indicator.setStartInterpolator(new AccelerateInterpolator());
indicator.setEndInterpolator(new DecelerateInterpolator(3));
indicator.setColors(ContextCompat.getColor(context, R.color.colorAccent));
return indicator;
);
//5.配置指示器,并和ViewPager产生绑定
topicIndicator.setNavigator(commonNavigator);
ViewPagerHelper.bind(topicIndicator, topicViewPager);
以上是关于实现 div 横向左右箭头滚动效果的主要内容,如果未能解决你的问题,请参考以下文章