抖音上下滑动,监听播放,自动吸顶,吸底效果
使用RecyclerView+PagerSnapHelper实现
public class DouYinLayoutManager extends LinearLayoutManager implements RecyclerView.OnChildAttachStateChangeListener{
//判断是否上滑还是下滑
private int mDrift;
private OnViewPagerListener onViewPagerListener;
//吸顶,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();
}
/**
* 当manager完全添加到recycleview中是会被调用
* @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:
//当前显示的item
View snapView = pagerSnapHelper.findSnapView(this);
if (onViewPagerListener != null){
onViewPagerListener.onPageSelected(false,snapView);
}
break;
}
super.onScrollStateChanged(state);
}
}
- 1
- 2
- 3
- 4
- 5
- 6
- 7
- 8
- 9
- 10
- 11
- 12
- 13
- 14
- 15
- 16
- 17
- 18
- 19
- 20
- 21
- 22
- 23
- 24
- 25
- 26
- 27
- 28
- 29
- 30
- 31
- 32
- 33
- 34
- 35
- 36
- 37
- 38
- 39
- 40
- 41
- 42
- 43
- 44
- 45
- 46
- 47
- 48
- 49
- 50
- 51
- 52
- 53
- 54
- 55
- 56
- 57
- 58
- 59
- 60
- 61
- 62
- 63
- 64
- 65
- 66
- 67
- 68
- 69
- 70
- 71
- 72
- 73
- 74
- 75
- 76
- 77
- 78
- 79
- 80
- 81
- 82
- 83
- 84
- 85
- 86
- 87
- 88
- 89
- 90
- 91
- 92
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);
}
});
}
- 1
- 2
- 3
- 4
- 5
- 6
- 7
- 8
- 9
- 10
- 11
- 12
- 13
- 14
- 15
- 16
- 17