在垂直滚动期间RecyclerView混合主适配器项目的水平滚动位置。
MainActivity 的代码：
LinearLayoutManager layoutManager = new LinearLayoutManager(this, LinearLayoutManager.VERTICAL, false);
recyclerView = (RecyclerView) findViewById(R.id.recycler_viewiew);
recyclerView.setHasFixedSize(true);
recyclerView.setLayoutManager(layoutManager);
adapterChanels = new AdapterChanels(this);
recyclerView.swapAdapter(adapterChanels, false);
RecyclerView 物品持有人：
programView = (RecyclerView)itemView.findViewById(R.id.progra_view);
LinearLayoutManager layoutManager = new LinearLayoutManager(activty, LinearLayoutManager.HORIZONTAL, false);
layoutManager.setAutoMeasureEnabled(true);
programView.setLayoutManager(layoutManager);
programView.setHasFixedSize(true);
onBindViewHolder：
holder.programView.setAdapter(holder.schedulAdapter);
holder.schedulAdapter.notifyDataSetChanged();
holder.programView.post(new Runnable() {
@Override
public void run() {
int pos = onScrollListener.getmCurX() - holder.programView.computeHorizontalScrollOffset();
holder.programView.removeOnScrollListener(onScrollListener);
holder.programView.scrollBy(onScrollListener.getmCurX(),0);
holder.programView.addOnScrollListener(onScrollListener);
}
});
RecyclerView 项 OnScrollListener：
public class OnScrollListener extends RecyclerView.OnScrollListener {
private static final String Tag = OnScrollListener.class.getName();
int mCurX = 0;
RecyclerView mainRecyclerView;
LinearLayoutManager verticalLinearLayoutManager;
public OnScrollListener(RecyclerView mainRecyclerView, LinearLayoutManager verticalLinearLayoutManager, int startPos) {
mCurX = startPos;
this.mainRecyclerView = mainRecyclerView;
this.verticalLinearLayoutManager = verticalLinearLayoutManager;
}
@Override
public void onScrollStateChanged(final RecyclerView recyclerView, final int newState) {
super.onScrollStateChanged(recyclerView, newState);
switch (newState) {
case RecyclerView.SCROLL_STATE_IDLE:
final int firstVisibleItemPosition1 = verticalLinearLayoutManager.findFirstVisibleItemPosition();
final int lastVisibleItemPosition1 = verticalLinearLayoutManager.findLastVisibleItemPosition();
for (int i = firstVisibleItemPosition1; i <= lastVisibleItemPosition1; ++i) {
RecyclerView horizontalRecyclerView = (RecyclerView) mainRecyclerView.findViewHolderForAdapterPosition(i).itemView.findViewById(R.id.progra_view);
if (horizontalRecyclerView != null && horizontalRecyclerView != recyclerView)
horizontalRecyclerView.addOnScrollListener(this);
}
recyclerView.setTag(false);
break;
case RecyclerView.SCROLL_STATE_SETTLING:
case RecyclerView.SCROLL_STATE_DRAGGING:
final int firstVisibleItemPosition = verticalLinearLayoutManager.findFirstVisibleItemPosition();
final int lastVisibleItemPosition = verticalLinearLayoutManager.findLastVisibleItemPosition();
for (int i = firstVisibleItemPosition; i <= lastVisibleItemPosition; ++i) {
RecyclerView horizontalRecyclerView = (RecyclerView) mainRecyclerView.findViewHolderForAdapterPosition(i).itemView.findViewById(R.id.progra_view);
if (horizontalRecyclerView != null && horizontalRecyclerView != recyclerView)
horizontalRecyclerView.removeOnScrollListener(this);
}
}
}
@Override
public void onScrolled(RecyclerView recyclerView, final int dx, int dy) {
super.onScrolled(recyclerView, dx, dy);
boolean isScrollTo = (boolean) recyclerView.getTag();
if (isScrollTo) {
mCurX += dx;
final int firstVisibleItemPosition = verticalLinearLayoutManager.findFirstVisibleItemPosition();
final int lastVisibleItemPosition = verticalLinearLayoutManager.findLastVisibleItemPosition();
for (int i = firstVisibleItemPosition; i <= lastVisibleItemPosition; ++i) {
if (mainRecyclerView.findViewHolderForAdapterPosition(i) != null) {
final RecyclerView horizontalRecyclerView = (RecyclerView) mainRecyclerView.findViewHolderForAdapterPosition(i).itemView.findViewById(R.id.progra_view);
if (horizontalRecyclerView != null && horizontalRecyclerView != recyclerView)
horizontalRecyclerView.scrollBy(dx, 0);
}
}
}
}
public void moveTo(final int moveX) {
mCurX = mCurX + moveX;
final int firstVisibleItemPosition = verticalLinearLayoutManager.findFirstVisibleItemPosition();
final int lastVisibleItemPosition = verticalLinearLayoutManager.findLastVisibleItemPosition();
for (int i = firstVisibleItemPosition; i <= lastVisibleItemPosition; ++i) {
if (mainRecyclerView.findViewHolderForAdapterPosition(i) != null) {
final RecyclerView horizontalRecyclerView = (RecyclerView) mainRecyclerView.findViewHolderForAdapterPosition(i).itemView.findViewById(R.id.progra_view);
if (horizontalRecyclerView != null) {
horizontalRecyclerView.post(new Runnable() {
@Override
public void run() {
horizontalRecyclerView.removeOnScrollListener(getOnScrollListener());
horizontalRecyclerView.scrollBy(moveX, 0);
horizontalRecyclerView.addOnScrollListener(getOnScrollListener());
horizontalRecyclerView.invalidate();
}
});
}
}
}
}
public int getmCurX() {
return mCurX;
}
public void moveToZero() {
mCurX = 0;
for (int i = 0; i <= mainRecyclerView.getChildCount(); i++) {
if (mainRecyclerView.getChildAt(i) != null) {
final RecyclerView horizontalRecyclerView = (RecyclerView) mainRecyclerView.getChildAt(i).findViewById(R.id.progra_view);
if (horizontalRecyclerView != null)
horizontalRecyclerView.removeOnScrollListener(getOnScrollListener());
horizontalRecyclerView.scrollBy(-horizontalRecyclerView.computeHorizontalScrollOffset(), 0);
horizontalRecyclerView.addOnScrollListener(getOnScrollListener());
horizontalRecyclerView.invalidate();
}
}
}
}
RecyclerView 项目 RecyclerViewItemTouch：
public class RecyclerViewItemTouch implements RecyclerView.OnItemTouchListener {
public static final String Tag = RecyclerViewItemTouch.class.getName();
Context context;
RecyclerView recyclerView;
RecyclerView lastView;
public RecyclerViewItemTouch(Context context, RecyclerView recyclerView) {
this.context = context;
this.recyclerView = recyclerView;
}
@Override
public boolean onInterceptTouchEvent(RecyclerView rv, MotionEvent e) {
int action = e.getAction();
switch (action){
case MotionEvent.ACTION_UP:
break;
case MotionEvent.ACTION_DOWN:
if (lastView != null){
lastView.setTag(false);
}
stopScroll();
rv.setTag(true);
lastView = rv;
break;
case MotionEvent.ACTION_MOVE:
break;
}
return false;
}
@Override
public void onTouchEvent(RecyclerView rv, MotionEvent e) {
}
@Override
public void onRequestDisallowInterceptTouchEvent(boolean disallowIntercept) {
}
private void stopScroll(){
if (recyclerView != null){
for (int i = 0; i < recyclerView.getChildCount(); i ++){
((RecyclerView)recyclerView.getChildAt(i).findViewById(R.id.progra_view)).stopScroll();
}
}
}
}
该程序是一个电视应用程序。左侧是频道名称，右侧是频道的时间表。当我左右滚动时，它也应该滚动时间线。当我进行垂直滚动（之后调用 onBind 方法）时会出现问题。在onBinde方法里面我尝试做一个水平滚动持有人的recyclerView，但是它不滚动，为什么？