Java Code Examples for androidx.recyclerview.widget.LinearLayoutManager#findFirstVisibleItemPosition()
The following examples show how to use
androidx.recyclerview.widget.LinearLayoutManager#findFirstVisibleItemPosition() .
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Example 1
| Source File: SelectionHandler.java From dhis2-android-capture-app with BSD 3-Clause "New" or "Revised" License | 6 votes |
|
public void changeSelectionOfRecyclerView(CellRecyclerView recyclerView, AbstractViewHolder
.SelectionState selectionState, @ColorInt int backgroundColor) {
LinearLayoutManager linearLayoutManager = (LinearLayoutManager) recyclerView
.getLayoutManager();
for (int i = linearLayoutManager.findFirstVisibleItemPosition(); i < linearLayoutManager
.findLastVisibleItemPosition() + 1; i++) {
AbstractViewHolder viewHolder = (AbstractViewHolder) recyclerView
.findViewHolderForAdapterPosition(i);
if (viewHolder != null) {
if (!mTableView.isIgnoreSelectionColors()) {
// Change background color
viewHolder.setBackgroundColor(backgroundColor);
}
// Change selection status of the view holder
viewHolder.setSelected(selectionState);
}
}
}
Example 2
| Source File: SearchFragment.java From hipda with GNU General Public License v2.0 | 6 votes |
|
@Override
public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
if (dy > 0) {
LinearLayoutManager layoutManager = (LinearLayoutManager) recyclerView.getLayoutManager();
visibleItemCount = layoutManager.getChildCount();
totalItemCount = layoutManager.getItemCount();
int firstVisibleItem = layoutManager.findFirstVisibleItemPosition();
if ((visibleItemCount + firstVisibleItem) >= totalItemCount - 5) {
if (!mInloading) {
mInloading = true;
if (mPage < mMaxPage) {
mPage++;
mRecyclerView.setFooterState(XFooterView.STATE_LOADING);
SimpleListJob job = new SimpleListJob(getActivity(), mSessionId, mType, mPage, mSearchBean);
JobMgr.addJob(job);
} else {
mRecyclerView.setFooterState(XFooterView.STATE_END);
}
}
}
}
}
Example 3
| Source File: ConversationFragment.java From deltachat-android with GNU General Public License v3.0 | 6 votes |
|
private void manageMessageSeenState() {
LinearLayoutManager layoutManager = (LinearLayoutManager)list.getLayoutManager();
int firstPos = layoutManager.findFirstVisibleItemPosition();
int lastPos = layoutManager.findLastVisibleItemPosition();
if(firstPos == RecyclerView.NO_POSITION || lastPos == RecyclerView.NO_POSITION) {
return;
}
int[] ids = new int[lastPos - firstPos + 1];
int index = 0;
for(int pos = firstPos; pos <= lastPos; pos++) {
DcMsg message = ((ConversationAdapter) list.getAdapter()).getMsg(pos);
if (message.getFromId() != DC_CONTACT_ID_SELF && !message.isSeen()) {
ids[index] = message.getId();
index++;
}
}
dcContext.markseenMsgs(ids);
}
Example 4
| Source File: HorizontalRecyclerViewListener.java From TableView with MIT License | 6 votes |
|
/**
* This method calculates the current scroll position and its offset to help new attached
* recyclerView on window at that position and offset
*
* @see #getScrollPosition()
* @see #getScrollPositionOffset()
*/
private void renewScrollPosition(@NonNull RecyclerView recyclerView) {
LinearLayoutManager layoutManager = (LinearLayoutManager) recyclerView.getLayoutManager();
mScrollPosition = layoutManager.findFirstCompletelyVisibleItemPosition();
// That means there is no completely visible Position.
if (mScrollPosition == -1) {
mScrollPosition = layoutManager.findFirstVisibleItemPosition();
// That means there is just a visible item on the screen
if (mScrollPosition == layoutManager.findLastVisibleItemPosition()) {
// in this case we use the position which is the last & first visible item.
} else {
// That means there are 2 visible item on the screen. However, second one is not
// completely visible.
mScrollPosition = mScrollPosition + 1;
}
}
mScrollPositionOffset = layoutManager.findViewByPosition(mScrollPosition).getLeft();
}
Example 5
| Source File: SelectionHandler.java From TableView with MIT License | 6 votes |
|
public void changeSelectionOfRecyclerView(CellRecyclerView recyclerView, @NonNull AbstractViewHolder
.SelectionState selectionState, @ColorInt int backgroundColor) {
LinearLayoutManager linearLayoutManager = (LinearLayoutManager) recyclerView
.getLayoutManager();
for (int i = linearLayoutManager.findFirstVisibleItemPosition(); i < linearLayoutManager
.findLastVisibleItemPosition() + 1; i++) {
AbstractViewHolder viewHolder = (AbstractViewHolder) recyclerView
.findViewHolderForAdapterPosition(i);
if (viewHolder != null) {
if (!mTableView.isIgnoreSelectionColors()) {
// Change background color
viewHolder.setBackgroundColor(backgroundColor);
}
// Change selection status of the view holder
viewHolder.setSelected(selectionState);
}
}
}
Example 6
| Source File: CommentListingFragment.java From RedReader with GNU General Public License v3.0 | 6 votes |
|
public void handleCommentVisibilityToggle(final RedditCommentView view) {
final RedditChangeDataManager changeDataManager = RedditChangeDataManager.getInstance(mUser);
final RedditCommentListItem item = view.getComment();
if(item.isComment()) {
final RedditRenderableComment comment = item.asComment();
changeDataManager.markHidden(
RRTime.utcCurrentTimeMillis(),
comment,
!comment.isCollapsed(changeDataManager));
mCommentListingManager.updateHiddenStatus();
final LinearLayoutManager layoutManager = (LinearLayoutManager)mRecyclerView.getLayoutManager();
final int position = layoutManager.getPosition(view);
if(position == layoutManager.findFirstVisibleItemPosition()) {
layoutManager.scrollToPositionWithOffset(position, 0);
}
}
}
Example 7
| Source File: ThreadListFragment.java From hipda with GNU General Public License v2.0 | 6 votes |
|
@Override
public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
if (dy > 0) {
LinearLayoutManager mLayoutManager = (LinearLayoutManager) recyclerView.getLayoutManager();
visibleItemCount = mLayoutManager.getChildCount();
totalItemCount = mLayoutManager.getItemCount();
mFirstVisibleItem = mLayoutManager.findFirstVisibleItemPosition();
if ((visibleItemCount + mFirstVisibleItem) >= totalItemCount - 5) {
if (!mInloading) {
mPage++;
mInloading = true;
mRecyclerView.setFooterState(XFooterView.STATE_LOADING);
ThreadListJob job = new ThreadListJob(getActivity(), mSessionId, mForumId, mPage);
JobMgr.addJob(job);
}
}
}
}
Example 8
| Source File: UserinfoFragment.java From hipda with GNU General Public License v2.0 | 5 votes |
|
@Override
public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
if (dy > 0) {
LinearLayoutManager mLayoutManager = (LinearLayoutManager) recyclerView.getLayoutManager();
visibleItemCount = mLayoutManager.getChildCount();
totalItemCount = mLayoutManager.getItemCount();
int firstVisibleItem = mLayoutManager.findFirstVisibleItemPosition();
if ((visibleItemCount + firstVisibleItem) >= totalItemCount - 5) {
if (!mInloading) {
mInloading = true;
if (mPage < mMaxPage) {
mPage++;
mRecyclerView.setFooterState(XFooterView.STATE_LOADING);
SearchBean bean = new SearchBean();
bean.setUid(mUid);
bean.setSearchId(mSearchId);
SimpleListJob job = new SimpleListJob(UserinfoFragment.this.getActivity(), mSessionId,
SimpleListJob.TYPE_SEARCH_USER_THREADS,
mPage,
bean);
JobMgr.addJob(job);
} else {
mRecyclerView.setFooterState(XFooterView.STATE_END);
}
}
}
}
}
Example 9
| Source File: ScrollPositionListener.java From Hentoid with Apache License 2.0 | 5 votes |
|
@Override
public void onScrolled(@NonNull RecyclerView recyclerView, int dx, int dy) {
super.onScrolled(recyclerView, dx, dy);
LinearLayoutManager llm = (LinearLayoutManager) recyclerView.getLayoutManager();
if (llm != null) {
int firstVisibleItemPosition = llm.findFirstVisibleItemPosition();
int lastCompletelyVisibleItemPosition = llm.findLastCompletelyVisibleItemPosition();
onPositionChangeListener.accept(Math.max(firstVisibleItemPosition, lastCompletelyVisibleItemPosition));
}
}
Example 10
| Source File: ZoomableRecyclerView.java From Hentoid with Apache License 2.0 | 5 votes |
|
@Override
public void onScrolled(int dx, int dy) {
super.onScrolled(dx, dy);
LinearLayoutManager layoutManager = (LinearLayoutManager) getLayoutManager();
if (layoutManager != null) {
lastVisibleItemPosition = layoutManager.findLastVisibleItemPosition();
firstVisibleItemPosition = layoutManager.findFirstVisibleItemPosition();
}
}
Example 11
| Source File: VideoTrimmerView.java From Android-Video-Trimmer with Apache License 2.0 | 5 votes |
|
/**
* 水平滑动了多少px
*/
private int calcScrollXDistance() {
LinearLayoutManager layoutManager = (LinearLayoutManager) mVideoThumbRecyclerView.getLayoutManager();
int position = layoutManager.findFirstVisibleItemPosition();
View firstVisibleChildView = layoutManager.findViewByPosition(position);
int itemWidth = firstVisibleChildView.getWidth();
return (position) * itemWidth - firstVisibleChildView.getLeft();
}
Example 12
| Source File: AsyncAdapter.java From financisto with GNU General Public License v2.0 | 5 votes |
|
@Override
public void getItemRangeInto(int[] outRange) {
if (outRange == null) {
return;
}
if(recyclerView.getLayoutManager() instanceof LinearLayoutManager){
LinearLayoutManager llm = (LinearLayoutManager) recyclerView.getLayoutManager();
outRange[0] = llm.findFirstVisibleItemPosition();
outRange[1] = llm.findLastVisibleItemPosition();
}
if (outRange[0] == -1 && outRange[1] == -1) {
outRange[0] = 0;
outRange[1] = 0;
}
}
Example 13
| Source File: HorizontalScrollCompat.java From SmoothRefreshLayout with MIT License | 5 votes |
|
public static boolean canAutoRefresh(View view) {
if (ViewCatcherUtil.isRecyclerView(view)) {
RecyclerView recyclerView = (RecyclerView) view;
RecyclerView.LayoutManager manager = recyclerView.getLayoutManager();
if (manager == null) {
return false;
}
int firstVisiblePosition = -1;
if (manager instanceof LinearLayoutManager) {
LinearLayoutManager linearManager = ((LinearLayoutManager) manager);
if (linearManager.getOrientation() != RecyclerView.HORIZONTAL) {
return false;
}
firstVisiblePosition = linearManager.findFirstVisibleItemPosition();
} else if (manager instanceof StaggeredGridLayoutManager) {
StaggeredGridLayoutManager gridLayoutManager = (StaggeredGridLayoutManager) manager;
if (gridLayoutManager.getOrientation() != RecyclerView.HORIZONTAL) {
return false;
}
int[] firstPositions = new int[gridLayoutManager.getSpanCount()];
gridLayoutManager.findFirstVisibleItemPositions(firstPositions);
for (int value : firstPositions) {
if (value == 0) {
firstVisiblePosition = 0;
break;
}
}
}
RecyclerView.Adapter adapter = recyclerView.getAdapter();
return adapter != null && firstVisiblePosition == 0;
}
return false;
}
Example 14
| Source File: EndlessScrollListener.java From RendererRecyclerViewAdapter with Apache License 2.0 | 5 votes |
|
@Override
public void onScrolled(final RecyclerView mRecyclerView, final int dx, final int dy) {
super.onScrolled(mRecyclerView, dx, dy);
final LinearLayoutManager mLayoutManager = (LinearLayoutManager) mRecyclerView.getLayoutManager();
visibleItemCount = mRecyclerView.getChildCount();
totalItemCount = mLayoutManager.getItemCount();
firstVisibleItem = mLayoutManager.findFirstVisibleItemPosition();
onScroll(firstVisibleItem, visibleItemCount, totalItemCount);
}
Example 15
| Source File: GamesTutorial.java From PretendYoureXyzzyAndroid with GNU General Public License v3.0 | 5 votes |
|
public final boolean buildSequence(@NonNull View createGame, @NonNull RecyclerView list) {
LinearLayoutManager llm = (LinearLayoutManager) list.getLayoutManager();
if (llm == null) return false;
int pos = llm.findFirstVisibleItemPosition();
if (pos == -1) return false;
GamesAdapter.ViewHolder holder = (GamesAdapter.ViewHolder) list.findViewHolderForLayoutPosition(pos);
if (holder != null) {
add(forView(holder.status, R.string.tutorial_gameStatus)
.focusShape(FocusShape.CIRCLE)
.enableAutoTextPosition()
.fitSystemWindows(true));
add(forView(holder.locked, R.string.tutorial_gameLocked)
.focusShape(FocusShape.CIRCLE)
.enableAutoTextPosition()
.fitSystemWindows(true));
add(forView(holder.spectate, R.string.tutorial_spectateGame)
.focusShape(FocusShape.ROUNDED_RECTANGLE)
.roundRectRadius(8)
.enableAutoTextPosition()
.fitSystemWindows(true));
add(forView(holder.join, R.string.tutorial_joinGame)
.focusShape(FocusShape.ROUNDED_RECTANGLE)
.roundRectRadius(8)
.enableAutoTextPosition()
.fitSystemWindows(true));
add(forView(createGame, R.string.tutorial_createGame)
.focusShape(FocusShape.CIRCLE)
.enableAutoTextPosition()
.fitSystemWindows(true));
return true;
}
return false;
}
Example 16
| Source File: StickyItemDecoration.java From AndroidAnimationExercise with Apache License 2.0 | 4 votes |
|
@Override
public void onDrawOver(Canvas c, RecyclerView parent, RecyclerView.State state) {
super.onDrawOver(c, parent, state);
if (parent.getAdapter().getItemCount() <= 0) return;
mLayoutManager = (LinearLayoutManager) parent.getLayoutManager();
mCurrentUIFindStickView = false;
for (int m = 0, size = parent.getChildCount(); m < size; m++) {
View view = parent.getChildAt(m);
/**
* 如果是吸附的view
*/
if (mStickyView.isStickyView(view)) {
mCurrentUIFindStickView = true;
getStickyViewHolder(parent);
cacheStickyViewPosition(m);
if (view.getTop() <= 0) {
bindDataForStickyView(mLayoutManager.findFirstVisibleItemPosition(), parent.getMeasuredWidth());
} else {
if (mStickyPositionList.size() > 0) {
if (mStickyPositionList.size() == 1) {
bindDataForStickyView(mStickyPositionList.get(0), parent.getMeasuredWidth());
} else {
int currentPosition = getStickyViewPositionOfRecyclerView(m);
int indexOfCurrentPosition = mStickyPositionList.lastIndexOf(currentPosition);
if (indexOfCurrentPosition >= 1) bindDataForStickyView(mStickyPositionList.get(indexOfCurrentPosition - 1), parent.getMeasuredWidth());
}
}
}
if (view.getTop() > 0 && view.getTop() <= mStickyItemViewHeight) {
mStickyItemViewMarginTop = mStickyItemViewHeight - view.getTop();
} else {
mStickyItemViewMarginTop = 0;
View nextStickyView = getNextStickyView(parent);
if (nextStickyView != null && nextStickyView.getTop() <= mStickyItemViewHeight) {
mStickyItemViewMarginTop = mStickyItemViewHeight - nextStickyView.getTop();
}
}
drawStickyItemView(c);
break;
}
}
if (!mCurrentUIFindStickView) {
mStickyItemViewMarginTop = 0;
if (mLayoutManager.findFirstVisibleItemPosition() + parent.getChildCount() == parent.getAdapter().getItemCount() && mStickyPositionList.size() > 0) {
bindDataForStickyView(mStickyPositionList.get(mStickyPositionList.size() - 1), parent.getMeasuredWidth());
}
drawStickyItemView(c);
}
}
Example 17
| Source File: BackToTopUtils.java From Mysplash with GNU Lesser General Public License v3.0 | 4 votes |
|
private static int getFirstVisibleItemPosition(LinearLayoutManager manager) {
return manager.findFirstVisibleItemPosition();
}
Example 18
| Source File: RecyclerViewStickyHeadItemDecoration.java From RecyclerViewDecoration with Apache License 2.0 | 4 votes |
|
@Override
public void onDrawOver(Canvas c, RecyclerView parent, RecyclerView.State state) {
super.onDrawOver(c, parent, state);
if (parent ==null || parent.getAdapter() == null || parent.getAdapter().getItemCount() == 0
|| parent.getLayoutManager() == null) {
return;
}
if (parent.getLayoutManager() instanceof LinearLayoutManager) {
LinearLayoutManager layoutManager = (LinearLayoutManager) parent.getLayoutManager();
boolean findStickView = false;
int itemCount = parent.getChildCount();
for (int i = 0; i < itemCount; i++) {
View view = parent.getChildAt(i);
if (isGroupViewType(parent.getChildAdapterPosition(view))) {
findStickView = true;
if (mCurrentStickyViewHolder == null) {
mCurrentStickyViewHolder = parent.getAdapter().onCreateViewHolder(parent, mGroupViewType);
mStickyView = mCurrentStickyViewHolder.itemView;
}
if (view.getTop() <= 0) {
bindDataForStickyView(layoutManager.findFirstVisibleItemPosition());
} else {
if (mStickyPositionList.size() > 0) {
if (mStickyPositionList.size() == 1) {
bindDataForStickyView(mStickyPositionList.get(0));
} else {
int currentPosition = layoutManager.findFirstVisibleItemPosition() + i;
int indexOfCurrentPosition = mStickyPositionList.lastIndexOf(currentPosition);
bindDataForStickyView(mStickyPositionList.get(indexOfCurrentPosition - 1));
}
}
}
if (view.getTop() > 0 && view.getTop() <= mStickyViewHeight) {
mStickyViewMarginTop = mStickyViewHeight - view.getTop();
} else {
mStickyViewMarginTop = 0;
View nextStickyView = getNextStickyView();
if (nextStickyView != null && nextStickyView.getTop() <= mStickyViewHeight) {
mStickyViewMarginTop = mStickyViewHeight - nextStickyView.getTop();
}
}
drawStickyView(c);
break;
}
}
if (!findStickView) {
mStickyViewMarginTop = 0;
if (layoutManager.findFirstVisibleItemPosition() + parent.getChildCount() == parent.getAdapter().getItemCount()
&& mStickyPositionList.size() > 0) {
bindDataForStickyView(mStickyPositionList.get(mStickyPositionList.size() - 1));
}
drawStickyView(c);
}
} else {
try {
throw new IllegalAccessException("Only support RecyclerView LinearLayoutManager.VERTICAL");
} catch (IllegalAccessException e) {
e.printStackTrace();
}
}
}
Example 19
| Source File: ScrollPositionListener.java From Hentoid with Apache License 2.0 | 4 votes |
|
@Override
public void onScrollStateChanged(@NonNull RecyclerView recyclerView, int newState) {
super.onScrollStateChanged(recyclerView, newState);
if (!Preferences.isViewerSwipeToTurn() || !isScrollEnabled) {
recyclerView.stopScroll();
return;
}
LinearLayoutManager llm = (LinearLayoutManager) recyclerView.getLayoutManager();
if (llm != null) {
if (RecyclerView.SCROLL_STATE_DRAGGING == newState) {
dragStartPositionX = recyclerView.computeHorizontalScrollOffset();
dragStartPositionY = recyclerView.computeVerticalScrollOffset();
isSettlingX = false;
isSettlingY = false;
} else if (RecyclerView.SCROLL_STATE_SETTLING == newState) {
// If the settling position is different from the original position, ignore that scroll
// (e.g. snapping back to the original position after a small scroll)
if (recyclerView.computeHorizontalScrollOffset() != dragStartPositionX)
isSettlingX = true;
if (recyclerView.computeVerticalScrollOffset() != dragStartPositionY)
isSettlingY = true;
} else if (RecyclerView.SCROLL_STATE_IDLE == newState) {
// Don't do anything if we're not on a boundary
if (!(llm.findLastVisibleItemPosition() == llm.getItemCount() - 1 || 0 == llm.findFirstVisibleItemPosition()))
return;
if (recyclerView.computeHorizontalScrollOffset() == dragStartPositionX && !isSettlingX && llm.canScrollHorizontally()) {
if (0 == dragStartPositionX && !llm.getReverseLayout())
onStartOutOfBoundScroll.run();
else if (0 == dragStartPositionX) onEndOutOfBoundScroll.run();
else if (llm.getReverseLayout()) onStartOutOfBoundScroll.run();
else onEndOutOfBoundScroll.run();
}
if (recyclerView.computeVerticalScrollOffset() == dragStartPositionY && !isSettlingY && llm.canScrollVertically()) {
if (0 == dragStartPositionY && !llm.getReverseLayout())
onStartOutOfBoundScroll.run();
else if (0 == dragStartPositionY) onEndOutOfBoundScroll.run();
else if (llm.getReverseLayout()) onStartOutOfBoundScroll.run();
else onEndOutOfBoundScroll.run();
}
}
}
}
Example 20
| Source File: AlScrollListener.java From Applozic-Android-SDK with BSD 3-Clause "New" or "Revised" License | 4 votes |
|
@Override
public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
super.onScrolled(recyclerView, dx, dy);
RecyclerView.LayoutManager manager = recyclerView.getLayoutManager();
visibleItemCount = recyclerView.getChildCount();
if (manager instanceof GridLayoutManager) {
GridLayoutManager gridLayoutManager = (GridLayoutManager) manager;
firstVisibleItem = gridLayoutManager.findFirstVisibleItemPosition();
totalItemCount = gridLayoutManager.getItemCount();
} else if (manager instanceof LinearLayoutManager) {
LinearLayoutManager linearLayoutManager = (LinearLayoutManager) manager;
firstVisibleItem = linearLayoutManager.findFirstVisibleItemPosition();
totalItemCount = linearLayoutManager.getItemCount();
}
if (infiniteScrollingEnabled) {
if (loading) {
if (totalItemCount > previousTotal) {
loading = false;
previousTotal = totalItemCount;
}
}
if ((totalItemCount - visibleItemCount) == 0) {
return;
}
if (!loading && (totalItemCount - visibleItemCount <= firstVisibleItem + visibleThreshold)) {
// End has been reached
// do something
onLoadMore();
loading = true;
}
}
if (firstVisibleItem == 0) {
if (!controlsVisible) {
onScrollUp();
controlsVisible = true;
}
return;
}
if (scrolledDistance > HIDE_THRESHOLD && controlsVisible) {
onScrollDown();
controlsVisible = false;
scrolledDistance = 0;
} else if (scrolledDistance < -HIDE_THRESHOLD && !controlsVisible) {
onScrollUp();
controlsVisible = true;
scrolledDistance = 0;
}
if ((controlsVisible && dy > 0) || (!controlsVisible && dy < 0)) {
scrolledDistance += dy;
}
}
