Java Code Examples for androidx.recyclerview.widget.LinearLayoutManager#findLastVisibleItemPosition()

The following examples show how to use androidx.recyclerview.widget.LinearLayoutManager#findLastVisibleItemPosition() . You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.

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: 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 3

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 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: MessagesActivity.java From android with MIT License

6 votes

@Override
public void onScrolled(RecyclerView view, int dx, int dy) {
    LinearLayoutManager linearLayoutManager = (LinearLayoutManager) view.getLayoutManager();
    if (linearLayoutManager != null) {
        int lastVisibleItem = linearLayoutManager.findLastVisibleItemPosition();
        int totalItemCount = view.getAdapter().getItemCount();

        if (lastVisibleItem > totalItemCount - 15
                && totalItemCount != 0
                && messages.canLoadMore(appId)) {
            if (!isLoadMore) {
                isLoadMore = true;
                new LoadMore().execute(appId);
            }
        }
    }
}

Example 6

Source File: BookmarksView.java From FirefoxReality with Mozilla Public License 2.0

6 votes

@Override
public void onMore(@NonNull View view, @NonNull Bookmark item) {
    mBinding.bookmarksList.requestFocusFromTouch();

    int rowPosition = mBookmarkAdapter.getItemPosition(item.getGuid());
    RecyclerView.ViewHolder row = mBinding.bookmarksList.findViewHolderForLayoutPosition(rowPosition);
    boolean isLastVisibleItem = false;
    if (mBinding.bookmarksList.getLayoutManager() instanceof LinearLayoutManager) {
        LinearLayoutManager layoutManager = (LinearLayoutManager) mBinding.bookmarksList.getLayoutManager();
        int lastItem = mBookmarkAdapter.getItemCount();
        if ((rowPosition == layoutManager.findLastVisibleItemPosition() || rowPosition == layoutManager.findLastCompletelyVisibleItemPosition() ||
                rowPosition == layoutManager.findLastVisibleItemPosition()-1 || rowPosition == layoutManager.findLastCompletelyVisibleItemPosition()-1)
                && rowPosition != lastItem) {
            isLastVisibleItem = true;
        }
    }

    mBinding.getCallback().onShowContextMenu(
            row.itemView,
            item,
            isLastVisibleItem);
}

Example 7

Source File: DownloadsView.java From FirefoxReality with Mozilla Public License 2.0

6 votes

@Override
public void onMore(@NonNull View view, @NonNull Download item) {
    mBinding.downloadsList.requestFocusFromTouch();

    int rowPosition = mDownloadsAdapter.getItemPosition(item.getId());
    RecyclerView.ViewHolder row = mBinding.downloadsList.findViewHolderForLayoutPosition(rowPosition);
    boolean isLastVisibleItem = false;
    if (mBinding.downloadsList.getLayoutManager() instanceof LinearLayoutManager) {
        LinearLayoutManager layoutManager = (LinearLayoutManager) mBinding.downloadsList.getLayoutManager();
        int lastItem = mDownloadsAdapter.getItemCount();
        if ((rowPosition == layoutManager.findLastVisibleItemPosition() || rowPosition == layoutManager.findLastCompletelyVisibleItemPosition() ||
                rowPosition == layoutManager.findLastVisibleItemPosition() - 1 || rowPosition == layoutManager.findLastCompletelyVisibleItemPosition() - 1)
                && ((rowPosition == (lastItem - 1)) && rowPosition > 2)) {
            isLastVisibleItem = true;
        }
    }

    if (row != null) {
        mBinding.getCallback().onShowContextMenu(
                row.itemView,
                item,
                isLastVisibleItem);
    }
}

Example 8

Source File: HistoryView.java From FirefoxReality with Mozilla Public License 2.0

6 votes

@Override
public void onMore(View view, VisitInfo item) {
    mBinding.historyList.requestFocusFromTouch();

    int rowPosition = mHistoryAdapter.getItemPosition(item.getVisitTime());
    RecyclerView.ViewHolder row = mBinding.historyList.findViewHolderForLayoutPosition(rowPosition);
    boolean isLastVisibleItem = false;
    if (mBinding.historyList.getLayoutManager() instanceof LinearLayoutManager) {
        LinearLayoutManager layoutManager = (LinearLayoutManager) mBinding.historyList.getLayoutManager();
        int lastItem = mHistoryAdapter.getItemCount();
        if ((rowPosition == layoutManager.findLastVisibleItemPosition() || rowPosition == layoutManager.findLastCompletelyVisibleItemPosition() ||
                rowPosition == layoutManager.findLastVisibleItemPosition() - 1 || rowPosition == layoutManager.findLastCompletelyVisibleItemPosition() - 1)
                && (rowPosition != lastItem && rowPosition > 2)) {
            isLastVisibleItem = true;
        }
    }

    if (row != null) {
        mBinding.getCallback().onShowContextMenu(
                row.itemView,
                item,
                isLastVisibleItem);
    }
}

Example 9

Source File: HorizontalRecyclerViewListener.java From dhis2-android-capture-app with BSD 3-Clause "New" or "Revised" 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(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 10

Source File: BaseRecyclerAdapter.java From NewFastFrame with Apache License 2.0

5 votes

private void notifyLoadMoreChanged() {
    if (data.size() == 0) {
        //            数据为空的时候不要显示脚步布局
        if (mLoadMoreFooterContainer!=null&&mLoadMoreFooterContainer.getChildAt(0) instanceof LoadMoreFooterView) {
            ((LoadMoreFooterView) mLoadMoreFooterContainer.getChildAt(0)).setStatus(LoadMoreFooterView.Status.GONE);
        }
        return;
    }
    if (hasMoreLoadView()) {
        int lastVisiblePosition;
        if (layoutManager instanceof LinearLayoutManager) {
            LinearLayoutManager linearLayoutManager = (LinearLayoutManager) layoutManager;
            lastVisiblePosition = linearLayoutManager.findLastVisibleItemPosition();
        } else {
            StaggeredGridLayoutManager gridLayoutManager = (StaggeredGridLayoutManager) layoutManager;
            lastVisiblePosition = gridLayoutManager.findLastVisibleItemPositions(null)[0];
        }
        int position;
        position = getItemUpCount() + getData().size();
        if (lastVisiblePosition == 0 && getData().size() > 0) {
            lastVisiblePosition+=getData().size();
        }
        if (lastVisiblePosition != -1 && lastVisiblePosition == position) {
            if (mLoadMoreFooterContainer.getChildAt(0) instanceof LoadMoreFooterView) {
                ((LoadMoreFooterView) mLoadMoreFooterContainer.getChildAt(0)).setStatus(LoadMoreFooterView.Status.THE_END);
            }
        }
    }
}

Example 11

Source File: HorizontalScrollCompat.java From SmoothRefreshLayout with MIT License

5 votes

public static boolean canAutoLoadMore(View view) {
    if (ViewCatcherUtil.isRecyclerView(view)) {
        RecyclerView recyclerView = (RecyclerView) view;
        RecyclerView.LayoutManager manager = recyclerView.getLayoutManager();
        if (manager == null) {
            return false;
        }
        int lastVisiblePosition = 0;
        if (manager instanceof LinearLayoutManager) {
            LinearLayoutManager linearManager = ((LinearLayoutManager) manager);
            if (linearManager.getOrientation() != RecyclerView.HORIZONTAL) {
                return false;
            }
            lastVisiblePosition = linearManager.findLastVisibleItemPosition();
        } else if (manager instanceof StaggeredGridLayoutManager) {
            StaggeredGridLayoutManager gridLayoutManager = (StaggeredGridLayoutManager) manager;
            if (gridLayoutManager.getOrientation() != RecyclerView.HORIZONTAL) {
                return false;
            }
            int[] lastPositions = new int[gridLayoutManager.getSpanCount()];
            gridLayoutManager.findLastVisibleItemPositions(lastPositions);
            for (int value : lastPositions) {
                if (value > lastVisiblePosition) {
                    lastVisiblePosition = value;
                }
            }
        }
        RecyclerView.Adapter adapter = recyclerView.getAdapter();
        return adapter != null
                && adapter.getItemCount() > 0
                && lastVisiblePosition >= 0
                && lastVisiblePosition >= adapter.getItemCount() - 1;
    }
    return false;
}

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: HomeFragment.java From aptoide-client-v8 with GNU General Public License v3.0

5 votes

@UiThread @Override public void scrollToTop() {
  LinearLayoutManager layoutManager = ((LinearLayoutManager) bundlesList.getLayoutManager());
  int lastVisibleItemPosition = layoutManager.findLastVisibleItemPosition();
  if (lastVisibleItemPosition > 10) {
    bundlesList.scrollToPosition(10);
  }
  bundlesList.smoothScrollToPosition(0);
}

Example 14

Source File: AppsFragment.java From aptoide-client-v8 with GNU General Public License v3.0

5 votes

@UiThread @Override public void scrollToTop() {
  LinearLayoutManager layoutManager = ((LinearLayoutManager) appsRecyclerView.getLayoutManager());
  int lastVisibleItemPosition = layoutManager.findLastVisibleItemPosition();
  if (lastVisibleItemPosition > 10) {
    appsRecyclerView.scrollToPosition(10);
  }
  appsRecyclerView.smoothScrollToPosition(0);
}

Example 15

Source File: SearchResultFragment.java From aptoide-client-v8 with GNU General Public License v3.0

5 votes

@Override public void scrollToTop() {
  RecyclerView list;
  if (followedStoresResultList.getVisibility() == View.VISIBLE) {
    list = followedStoresResultList;
  } else {
    list = allStoresResultList;
  }
  LinearLayoutManager layoutManager = ((LinearLayoutManager) list.getLayoutManager());
  int lastVisibleItemPosition = layoutManager.findLastVisibleItemPosition();
  if (lastVisibleItemPosition > 10) {
    list.scrollToPosition(10);
  }
  list.smoothScrollToPosition(0);
}

Example 16

Source File: MoreBundleFragment.java From aptoide-client-v8 with GNU General Public License v3.0

5 votes

@UiThread @Override public void scrollToTop() {
  LinearLayoutManager layoutManager = ((LinearLayoutManager) bundlesList.getLayoutManager());
  int lastVisibleItemPosition = layoutManager.findLastVisibleItemPosition();
  if (lastVisibleItemPosition > 10) {
    bundlesList.scrollToPosition(10);
  }
  bundlesList.smoothScrollToPosition(0);
}

Example 17

Source File: MyStoresFragment.java From aptoide-client-v8 with GNU General Public License v3.0

5 votes

@Override @UiThread public void scrollToTop() {
  RecyclerView view = getRecyclerView();
  LinearLayoutManager layoutManager = ((LinearLayoutManager) view.getLayoutManager());
  int lastVisibleItemPosition = layoutManager.findLastVisibleItemPosition();
  if (lastVisibleItemPosition > 10) {
    view.scrollToPosition(10);
  }
  view.smoothScrollToPosition(0);
}

Example 18

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 19

Source File: SearchResultFragment.java From aptoide-client-v8 with GNU General Public License v3.0

4 votes

private boolean isEndReached(RecyclerViewScrollEvent event) {
  final LinearLayoutManager layoutManager = (LinearLayoutManager) event.view()
      .getLayoutManager();
  return layoutManager.getItemCount() - layoutManager.findLastVisibleItemPosition()
      <= VISIBLE_THRESHOLD;
}

Example 20

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();
            }
        }
    }
}