Java Code Examples for androidx.recyclerview.widget.RecyclerView#getChildAdapterPosition()

The following examples show how to use androidx.recyclerview.widget.RecyclerView#getChildAdapterPosition() . 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: GridSpacingItemDecoration.java    From UltimateRecyclerView with Apache License 2.0 6 votes vote down vote up 
@Override
public void getItemOffsets(Rect outRect, View view, RecyclerView parent, RecyclerView.State state) {
    int position = parent.getChildAdapterPosition(view); // item position
    int column = position % spanCount; // item column

    if (includeEdge) {
        outRect.left = spacing - column * spacing / spanCount; // spacing - column * ((1f / spanCount) * spacing)
        outRect.right = (column + 1) * spacing / spanCount; // (column + 1) * ((1f / spanCount) * spacing)

        if (position < spanCount) { // top edge
            outRect.top = spacing;
        }
        outRect.bottom = spacing; // item bottom
    } else {
        outRect.left = column * spacing / spanCount; // column * ((1f / spanCount) * spacing)
        outRect.right = spacing - (column + 1) * spacing / spanCount; // spacing - (column + 1) * ((1f /    spanCount) * spacing)
        if (position >= spanCount) {
            outRect.top = spacing; // item top
        }
    }
}
Example 2
Source File: HeaderShadowDecoration.java    From UltimateRecyclerView with Apache License 2.0 6 votes vote down vote up 
@Override
public void getItemOffsets(Rect outRect, View view, RecyclerView parent, RecyclerView.State state) {
    if (parent.getChildAdapterPosition(view) < mColumns) {
        if (mHorizontal) {
            if (mView.getMeasuredWidth() <= 0) {
                mView.measure(View.MeasureSpec.makeMeasureSpec(parent.getMeasuredWidth(), View.MeasureSpec.AT_MOST),
                        View.MeasureSpec.makeMeasureSpec(parent.getMeasuredHeight(), View.MeasureSpec.AT_MOST));
            }
            outRect.set(mView.getMeasuredWidth(), 0, 0, 0);
        } else {
            if (mView.getMeasuredHeight() <= 0) {
                mView.measure(View.MeasureSpec.makeMeasureSpec(parent.getMeasuredWidth(), View.MeasureSpec.AT_MOST),
                        View.MeasureSpec.makeMeasureSpec(parent.getMeasuredHeight(), View.MeasureSpec.AT_MOST));
            }
            outRect.set(0, mView.getMeasuredHeight(), 0, 0);
        }
    } else {
        outRect.setEmpty();
    }
}
Example 3
Source File: FilterUsersActivity.java    From Telegram-FOSS with GNU General Public License v2.0 6 votes vote down vote up 
@Override
public void onDraw(Canvas canvas, RecyclerView parent, RecyclerView.State state) {
    int width = parent.getWidth();
    int top;
    int childCount = parent.getChildCount() - (single ? 0 : 1);
    for (int i = 0; i < childCount; i++) {
        View child = parent.getChildAt(i);
        View nextChild = i < childCount - 1 ? parent.getChildAt(i + 1) : null;
        int position = parent.getChildAdapterPosition(child);
        if (position < skipRows || child instanceof GraySectionCell || nextChild instanceof GraySectionCell) {
            continue;
        }
        top = child.getBottom();
        canvas.drawLine(LocaleController.isRTL ? 0 : AndroidUtilities.dp(72), top, width - (LocaleController.isRTL ? AndroidUtilities.dp(72) : 0), top, Theme.dividerPaint);
    }
}
Example 4
Source File: GridSpacingItemDecoration.java    From PictureSelector with Apache License 2.0 6 votes vote down vote up 
@Override
public void getItemOffsets(Rect outRect, View view, RecyclerView parent, RecyclerView.State state) {
    int position = parent.getChildAdapterPosition(view);
    int column = position % spanCount;
    if (includeEdge) {
        outRect.left = spacing - column * spacing / spanCount;
        outRect.right = (column + 1) * spacing / spanCount;
        if (position < spanCount) {
            outRect.top = spacing;
        }
        outRect.bottom = spacing;
    } else {
        outRect.left = column * spacing / spanCount;
        outRect.right = spacing - (column + 1) * spacing / spanCount;
        if (position < spanCount) {
            outRect.top = spacing;
        }
        outRect.bottom = spacing;
    }
}
Example 5
Source File: GridItemDecoration.java    From Pixiv-Shaft with MIT License 6 votes vote down vote up 
@Override
public void getItemOffsets(Rect outRect, View view, RecyclerView parent, RecyclerView.State state) {
    int position = parent.getChildAdapterPosition(view); // item position
    int column = position % spanCount; // item column

    if (includeEdge) {
        outRect.left = spacing - column * spacing / spanCount; // spacing - column * ((1f / spanCount) * spacing)
        outRect.right = (column + 1) * spacing / spanCount; // (column + 1) * ((1f / spanCount) * spacing)

        if (position < spanCount) { // top edge
            outRect.top = spacing;
        }
        outRect.bottom = spacing; // item bottom
    } else {
        outRect.left = column * spacing / spanCount; // column * ((1f / spanCount) * spacing)
        outRect.right = spacing - (column + 1) * spacing / spanCount; // spacing - (column + 1) * ((1f /    spanCount) * spacing)
        if (position >= spanCount) {
            outRect.top = spacing; // item top
        }
    }
}
Example 6
Source File: PreferenceFragment.java    From MaterialPreference with Apache License 2.0 6 votes vote down vote up 
public final boolean shouldDrawDividerBelow(View view, RecyclerView parent) {
    if (!(parent.getAdapter() instanceof PreferenceGroupAdapter)) {
        return false;
    }
    PreferenceGroupAdapter adapter = (PreferenceGroupAdapter) parent.getAdapter();
    int index = parent.getChildAdapterPosition(view);
    if (index == RecyclerView.NO_POSITION) {
        return false;
    }
    Preference preference = adapter.getItem(index);
    switch (preference.getDividerBelowVisibility()) {
        case DividerVisibility.ENFORCED:
            return true;
        case DividerVisibility.FORBIDDEN:
            return false;
        case DividerVisibility.UNSPECIFIED:
        default:
            if (index == adapter.getItemCount() - 1) {
                return isAllowDividerAfterLastItem();
            }
            return shouldDrawDividerBelow(view, parent, adapter, index, preference);
    }
}
Example 7
Source File: PaddingDecoration.java    From Jockey with Apache License 2.0 5 votes vote down vote up 
@Override
public void getItemOffsets(Rect outRect, View view, RecyclerView parent,
                           RecyclerView.State state) {
    int indexInAdapter = parent.getChildAdapterPosition(view);
    if (indexInAdapter == 0) {
        outRect.top += mVerticalPadding;
    }
    if (indexInAdapter == parent.getAdapter().getItemCount() - 1) {
        outRect.bottom += mVerticalPadding;
    }
}
Example 8
Source File: OmegaRecyclerView.java    From OmegaRecyclerView with MIT License 5 votes vote down vote up 
protected int getAdapterPosition(RecyclerView parent, View view) {
    int childPosition = parent.getChildAdapterPosition(view);

    if (parent instanceof OmegaRecyclerView) {
        RecyclerView.Adapter adapter = parent.getAdapter();
        if (adapter instanceof HeaderFooterWrapperAdapter) {
            return ((HeaderFooterWrapperAdapter) adapter).applyChildPositionToRealPosition(childPosition);
        }
    }

    return childPosition;
}
Example 9
Source File: HorizontalHeaderItemDecoration.java    From aptoide-client-v8 with GNU General Public License v3.0 5 votes vote down vote up 
@Override public void onDraw(Canvas c, RecyclerView parent, RecyclerView.State state) {
  super.onDraw(c, parent, state);

  boolean foundFirstChild = false;
  float viewVerticalCenter = 0f;
  float left = 0f;
  float limit = -(layout.getMeasuredWidth() / 2f);
  float initialPosition =
      ((headerSize / 2f) - (layout.getMeasuredWidth() / 2f) - (margin / 2f)) * PARALLAX_RATIO;

  for (int i = 0; i < parent.getChildCount(); i++) {
    View view = parent.getChildAt(i);
    if (viewVerticalCenter == 0f) {
      viewVerticalCenter =
          view.getTop() + (view.getMeasuredHeight() / 2f) - (layout.getMeasuredWidth() / 2f);
    }
    if (parent.getChildAdapterPosition(view) == 0) {
      left =
          view.getLeft() - (headerSize / 2f) - (layout.getMeasuredWidth() / 2f) - (margin / 2f);
      left *= PARALLAX_RATIO;
      if (left < limit) {
        left = limit;
      }
      foundFirstChild = true;
      break;
    }
  }
  if (!foundFirstChild) {
    left = limit;
  }
  // With API <= 23, there's a bug where if alpha is set to 0, TextViews' alpha is not set correctly
  int movementPercentage = Math.max((int) (getPercentage(limit, initialPosition, left) * 255), 1);
  c.save();
  c.saveLayerAlpha(new RectF(0, 0, headerSize - 2, c.getHeight()), movementPercentage,
      Canvas.ALL_SAVE_FLAG);
  c.translate(left, viewVerticalCenter - VERTICAL_OFFSET);
  layout.draw(c);
  c.restore();
}
Example 10
Source File: StickyHeaderDecoration.java    From header-decor with Apache License 2.0 5 votes vote down vote up 
/**
 * {@inheritDoc}
 */
@Override
public void onDrawOver(@NonNull Canvas canvas, @NonNull RecyclerView parent,
        @NonNull RecyclerView.State state) {

    final int count = parent.getChildCount();
    long previousHeaderId = -1;

    for (int layoutPos = 0; layoutPos < count; layoutPos++) {
        final View child = parent.getChildAt(layoutPos);
        final int adapterPos = parent.getChildAdapterPosition(child);

        if (adapterPos != RecyclerView.NO_POSITION && hasHeader(adapterPos)) {
            long headerId = adapter.getHeaderId(adapterPos);

            if (headerId != previousHeaderId) {
                previousHeaderId = headerId;
                View header = getHeader(parent, adapterPos).itemView;
                canvas.save();

                final int left = child.getLeft();
                final int top = getHeaderTop(parent, child, header, adapterPos, layoutPos);
                canvas.translate(left, top);

                header.setTranslationX(left);
                header.setTranslationY(top);
                header.draw(canvas);
                canvas.restore();
            }
        }
    }
}
Example 11
Source File: StickyHeaderDecoration.java    From deltachat-android with GNU General Public License v3.0 5 votes vote down vote up 
protected int getHeaderTop(RecyclerView parent, View child, View header, int adapterPos,
                         int layoutPos)
{
  int headerHeight = getHeaderHeightForLayout(header);
  int top = getChildY(parent, child) - headerHeight;
  if (sticky && layoutPos == 0) {
    final int count = parent.getChildCount();
    final long currentId = adapter.getHeaderId(adapterPos);
    // find next view with header and compute the offscreen push if needed
    for (int i = 1; i < count; i++) {
      int adapterPosHere = parent.getChildAdapterPosition(parent.getChildAt(translatedChildPosition(parent, i)));
      if (adapterPosHere != RecyclerView.NO_POSITION) {
        long nextId = adapter.getHeaderId(adapterPosHere);
        if (nextId != currentId) {
          final View next = parent.getChildAt(translatedChildPosition(parent, i));
          final int offset = getChildY(parent, next) - (headerHeight + getHeader(parent, adapter, adapterPosHere).itemView.getHeight());
          if (offset < 0) {
            return offset;
          } else {
            break;
          }
        }
      }
    }

    if (sticky) top = Math.max(0, top);
  }

  return top;
}
Example 12
Source File: StickyHeaderDecoration.java    From GetApk with MIT License 5 votes vote down vote up 
private boolean isStickyView(RecyclerView parent, View v) {
    if (v == null) {
        return false;
    }
    int position = parent.getChildAdapterPosition(v);
    if (position == RecyclerView.NO_POSITION) {
        return false;
    }

    return isStickyViewType(parent, position, mAdapter.getItemViewType(position));
}
Example 13
Source File: BottomOffsetDecoration.java    From green_android with GNU General Public License v3.0 5 votes vote down vote up 
@Override
public void getItemOffsets(Rect outRect, View view, RecyclerView parent, RecyclerView.State state) {
    super.getItemOffsets(outRect, view, parent, state);
    int dataSize = state.getItemCount();
    int position = parent.getChildAdapterPosition(view);
    if (dataSize > 0 && position == dataSize - 1) {
        outRect.set(0, 0, 0, mBottomOffset);
    } else {
        outRect.set(0, 0, 0, 0);
    }

}
Example 14
Source File: HeaderPositionCalculator.java    From toktok-android with GNU General Public License v3.0 5 votes vote down vote up 
public void initHeaderBounds(@NonNull Rect bounds, @NonNull RecyclerView recyclerView, @NonNull View header, @NonNull View firstView, boolean firstHeader) {
    int orientation = mOrientationProvider.getOrientation(recyclerView);
    initDefaultHeaderOffset(bounds, recyclerView, header, firstView, orientation);

    if (firstHeader && isStickyHeaderBeingPushedOffscreen(recyclerView, header)) {
        View viewAfterNextHeader = getFirstViewUnobscuredByHeader(recyclerView, header);
        int firstViewUnderHeaderPosition = recyclerView.getChildAdapterPosition(viewAfterNextHeader);
        View secondHeader = mHeaderProvider.getHeader(recyclerView, firstViewUnderHeaderPosition);
        translateHeaderWithNextHeader(recyclerView, mOrientationProvider.getOrientation(recyclerView), bounds,
                header, viewAfterNextHeader, secondHeader);
    }
}
Example 15
Source File: GridItemDecoration.java    From odyssey with GNU General Public License v3.0 5 votes vote down vote up 
@Override
public void getItemOffsets(@NonNull Rect outRect, @NonNull View view, @NonNull RecyclerView parent, @NonNull RecyclerView.State state) {
    final int position = parent.getChildAdapterPosition(view);

    // get the current number of columns for the grid
    final int spanCount = ((GridLayoutManager) parent.getLayoutManager()).getSpanCount();

    final int left = isFirstInRow(position, spanCount) ? 0 : mHalfSpacingOffsetPX;
    final int top = isInFirstRow(position, spanCount) ? 0 : mSpacingOffsetPX;
    final int right = isLastInRow(position, spanCount) ? 0 : mHalfSpacingOffsetPX;

    // the offset for the bottom should always be 0 because the top margin of the next row will apply.
    outRect.set(left, top, right, 0);
}
Example 16
Source File: NoteAdapter.java    From kolabnotes-android with GNU Lesser General Public License v3.0 5 votes vote down vote up 
public void restoreElevation(RecyclerView recyclerView){
    for(int i=0; i < recyclerView.getChildCount(); i++){
        final View childAt = recyclerView.getChildAt(i);
        Utils.setElevation(childAt,5);
        if(i == recyclerView.getChildAdapterPosition(childAt)){
            Utils.setElevation(childAt,30);
        }
    }
}
Example 17
Source File: StickyRecyclerHeadersDecoration.java    From toktok-android with GNU General Public License v3.0 5 votes vote down vote up 
@Override
public void getItemOffsets(@NonNull Rect outRect, @NonNull View view, @NonNull RecyclerView parent, @NonNull RecyclerView.State state) {
    super.getItemOffsets(outRect, view, parent, state);
    int itemPosition = parent.getChildAdapterPosition(view);
    if (itemPosition == RecyclerView.NO_POSITION) {
        return;
    }
    if (mHeaderPositionCalculator.hasNewHeader(itemPosition, mOrientationProvider.isReverseLayout(parent))) {
        View header = getHeaderView(parent, itemPosition);
        setItemOffsetsForHeader(outRect, header, mOrientationProvider.getOrientation(parent));
    }
}
Example 18
Source File: GridSpaceDecoration.java    From NewFastFrame with Apache License 2.0 5 votes vote down vote up 
@Override
public void getItemOffsets(Rect outRect, View view, RecyclerView parent, RecyclerView.State state) {
    int position = parent.getChildAdapterPosition(view); // item position
    if (parent instanceof SuperRecyclerView) {
        SuperRecyclerView superRecyclerView = (SuperRecyclerView) parent;
        if (superRecyclerView.getHeaderContainer().getChildCount() > position) {
            return;
        }
        position -= superRecyclerView.getHeaderContainer().getChildCount();
    }
    int column = position % spanCount; // item column
    outRect.top = verticalSize;

    if (column == spanCount - 1) {
        if (includeEdge) {
            outRect.right = horizontalSize;
        }
        outRect.left = horizontalSize / 2;
    } else if (column == 0) {
        if (includeEdge) {
            outRect.left = horizontalSize;
        }
        outRect.right = horizontalSize / 2;
    } else {
        outRect.left = horizontalSize / 2;
        outRect.right = horizontalSize / 2;
    }
}
Example 19
Source File: SpacesBottomItemDecoration.java    From LoopBar with MIT License 4 votes vote down vote up 
@Override
public void getItemOffsets(@NonNull Rect outRect, @NonNull View view,
                           @NonNull RecyclerView parent, @NonNull RecyclerView.State state) {
    if (parent.getChildAdapterPosition(view) == parent.getAdapter().getItemCount() - 1)
        outRect.bottom = getSpace();
}
Example 20
Source File: SpacesLeftItemDecoration.java    From LoopBar with MIT License 4 votes vote down vote up 
@Override
public void getItemOffsets(@NonNull Rect outRect, @NonNull View view,
                           @NonNull RecyclerView parent, @NonNull RecyclerView.State state) {
    if (parent.getChildAdapterPosition(view) == 0)
        outRect.left = getSpace();
}