Android仿抖音上下滑動佈局
阿新 • • 發佈:2020-01-07
抖音上下滑動,監聽播放,自動吸頂,吸底效果,供大家參考,具體內容如下
使用RecyclerView+PagerSnapHelper實現
public class DouYinLayoutManager extends LinearLayoutManager implements RecyclerView.OnChildAttachStateChangeListener{ //判斷是否上滑還是下滑 private int mDrift; private OnViewPagerListener onViewPagerListener; //吸頂,吸底 private PagerSnapHelper pagerSnapHelper; public OnViewPagerListener getOnViewPagerListener() { return onViewPagerListener; } public void setOnViewPagerListener(OnViewPagerListener onViewPagerListener) { this.onViewPagerListener = onViewPagerListener; } public DouYinLayoutManager(Context context) { super(context); } public DouYinLayoutManager(Context context,int orientation,boolean reverseLayout) { super(context,orientation,reverseLayout); pagerSnapHelper = new PagerSnapHelper(); } /** * 當manager完全新增到recycleview中是會被呼叫 * @param view */ @Override public void onAttachedToWindow(RecyclerView view) { view.addOnChildAttachStateChangeListener(this); pagerSnapHelper.attachToRecyclerView(view); super.onAttachedToWindow(view); } @Override public boolean canScrollVertically() { return super.canScrollVertically(); } @Override public int scrollVerticallyBy(int dy,RecyclerView.Recycler recycler,RecyclerView.State state) { mDrift = dy; return super.scrollVerticallyBy(dy,recycler,state); } @Override public void onChildViewAttachedToWindow(@NonNull View view) { if (mDrift > 0){ //向上滑 if (onViewPagerListener != null && Math.abs(mDrift) == view.getHeight()){ onViewPagerListener.onPageSelected(false,view); } }else { //向下滑 if (onViewPagerListener != null && Math.abs(mDrift) == view.getHeight()){ onViewPagerListener.onPageSelected(true,view); } } } @Override public void onChildViewDetachedFromWindow(@NonNull View view) { if (mDrift >= 0){ //向上滑 if (onViewPagerListener != null){ onViewPagerListener.onPageRelease(true,view); } }else { //向下滑 if (onViewPagerListener != null){ onViewPagerListener.onPageRelease(false,view); } } } @Override public void onScrollStateChanged(int state) { switch (state){ case RecyclerView.SCROLL_STATE_IDLE: //當前顯示的item View snapView = pagerSnapHelper.findSnapView(this); if (onViewPagerListener != null){ onViewPagerListener.onPageSelected(false,snapView); } break; } super.onScrollStateChanged(state); } }
recyclerView.setLayoutManager()即可
recyclerView = findViewById(R.id.recyclerView_dy); douYinLayoutManager = new DouYinLayoutManager(this,OrientationHelper.VERTICAL,false); recyclerView.setLayoutManager(douYinLayoutManager); recyclerView.setAdapter(new MyAdapter()); douYinLayoutManager.setOnViewPagerListener(new OnViewPagerListener() { @Override public void onPageRelease(boolean isNest,View position) { releaseVideo(position); } @Override public void onPageSelected(boolean isButten,View position) { playVideo(position); } }); }
程式碼:MyUiDemo
以上就是本文的全部內容,希望對大家的學習有所幫助,也希望大家多多支援我們。