RecyclerView实现抖音纵向滚动ViewPager效果

使用RecyclerView实现抖音纵向滚动ViewPager效果，供大家参考，具体内容如下

创新互联建站始终坚持【策划先行，效果至上】的经营理念，通过多达10余年累计超上千家客户的网站建设总结了一套系统有效的全网推广解决方案，现已广泛运用于各行各业的客户，其中包括：成都航空箱等企业，备受客户赞美。

重写LinearLayoutManager，在onAttachedToWindow方法中使用 PagerSnapHelper设置RecyclerView条目加载方式为每次滚动加载一页

class MyLinearLayoutManager : LinearLayoutManager {

  private lateinit var mPagerSnapHelper: PagerSnapHelper
  private var mOnViewPagerListener: OnViewPagerListener? = null
  private lateinit var mRecyclerView: RecyclerView
  private var mDrift: Int = 0//位移，用来判断移动方向

  constructor(context: Context) : this(context, OrientationHelper.VERTICAL)
  constructor(context: Context, orientation: Int) : this(context, orientation, false)
  constructor(context: Context, orientation: Int, reverseLayout: Boolean) : super(context, orientation, reverseLayout) {
    mPagerSnapHelper = PagerSnapHelper()
  }

  override fun onAttachedToWindow(view: RecyclerView) {
    super.onAttachedToWindow(view)
    mPagerSnapHelper.attachToRecyclerView(view)//设置RecyclerView每次滚动一页
    mRecyclerView = view
    mRecyclerView.addOnChildAttachStateChangeListener(mChildAttachStateChangeListener)
  }


  /**
   * 滑动状态的改变
   * 缓慢拖拽-> SCROLL_STATE_DRAGGING
   * 快速滚动-> SCROLL_STATE_SETTLING
   * 空闲状态-> SCROLL_STATE_IDLE
   * @param state
   */
  override fun onScrollStateChanged(state: Int) {
    if (state == RecyclerView.SCROLL_STATE_IDLE){
      val viewIdle = mPagerSnapHelper.findSnapView(this)
      val positionIdle = getPosition(viewIdle!!)
      if (mOnViewPagerListener != null && childCount == 1) {
        mOnViewPagerListener!!.onPageSelected(positionIdle, positionIdle == itemCount - 1)
      }
    }
  }

  /**
   * 布局完成后调用
   * @param state
   */
  override fun onLayoutCompleted(state: RecyclerView.State?) {
    super.onLayoutCompleted(state)
    if (mOnViewPagerListener != null) mOnViewPagerListener!!.onLayoutComplete()
  }

  /**
   * 监听竖直方向的相对偏移量
   */
  override fun scrollVerticallyBy(dy: Int, recycler: RecyclerView.Recycler?, state: RecyclerView.State?): Int {
    this.mDrift = dy
    return super.scrollVerticallyBy(dy, recycler, state)
  }


  /**
   * 监听水平方向的相对偏移量
   */
  override fun scrollHorizontallyBy(dx: Int, recycler: RecyclerView.Recycler?, state: RecyclerView.State?): Int {
    this.mDrift = dx
    return super.scrollHorizontallyBy(dx, recycler, state)
  }

  /**
   * 设置监听
   * @param listener
   */
  fun setOnViewPagerListener(listener: OnViewPagerListener) {
    this.mOnViewPagerListener = listener
  }

  private val mChildAttachStateChangeListener = object : RecyclerView.OnChildAttachStateChangeListener {
    override fun onChildViewAttachedToWindow(view: View) {
    }

    override fun onChildViewDetachedFromWindow(view: View) {
      if (mDrift >= 0) {
        if (mOnViewPagerListener != null) mOnViewPagerListener!!.onPageRelease(true, getPosition(view))
      } else {
        if (mOnViewPagerListener != null) mOnViewPagerListener!!.onPageRelease(false, getPosition(view))
      }

    }
  }

  interface OnViewPagerListener{
    /*释放的监听*/
    fun onPageRelease(isNext: Boolean, position: Int)

    /*选中的监听以及判断是否滑动到底部*/
    fun onPageSelected(position: Int, isBottom: Boolean)

    /*布局完成的监听*/
    fun onLayoutComplete()
  }
}

重写RecyclerView条目内容主布局满屏填充

class MyImageView : ImageView {
  constructor(context: Context) : this(context, null!!)
  constructor(context: Context, attr: AttributeSet) : this(context, attr, 0)
  constructor(context: Context, attr: AttributeSet, defStyleAttr: Int) : super(context, attr, defStyleAttr)

  override fun onMeasure(widthMeasureSpec: Int, heightMeasureSpec: Int) {
    val width = View.getDefaultSize(0, widthMeasureSpec)
    val height = View.getDefaultSize(0, heightMeasureSpec)
    setMeasuredDimension(width, height)
  }

}

代码参考：LayoutManagerGroup

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持创新互联。

网页题目：RecyclerView实现抖音纵向滚动ViewPager效果
URL链接：http://cdiso.cn/article/iiieeo.html

RecyclerView实现抖音纵向滚动ViewPager效果

其他资讯