Java Code Examples for androidx.recyclerview.widget.RecyclerView#State

The following examples show how to use androidx.recyclerview.widget.RecyclerView#State . 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: HeaderShadowDecoration.java From UltimateRecyclerView with Apache License 2.0

6 votes

@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 2

Source File: MediaGridInset.java From Matisse with Apache License 2.0

6 votes

@Override
public void getItemOffsets(Rect outRect, View view, RecyclerView parent,
                           RecyclerView.State state) {
    int position = parent.getChildAdapterPosition(view); // item position
    int column = position % mSpanCount; // item column

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

        if (position < mSpanCount) { // top edge
            outRect.top = mSpacing;
        }
        outRect.bottom = mSpacing; // item bottom
    } else {
        // column * ((1f / spanCount) * spacing)
        outRect.left = column * mSpacing / mSpanCount;
        // spacing - (column + 1) * ((1f / spanCount) * spacing)
        outRect.right = mSpacing - (column + 1) * mSpacing / mSpanCount;
        if (position >= mSpanCount) {
            outRect.top = mSpacing; // item top
        }
    }
}

Example 3

Source File: HorizontalDecoration.java From QuickDevFramework with Apache License 2.0

6 votes

@Override
public void onDraw(Canvas c, RecyclerView parent, RecyclerView.State state) {
    super.onDraw(c, parent, state);
    int itemCount = parent.getChildCount();
    for (int i = 0; i < itemCount; i++) {
        View item = parent.getChildAt(i);
        RecyclerView.LayoutParams itemLayoutParams = (RecyclerView.LayoutParams) item.getLayoutParams();
        int left = item.getLeft() - itemLayoutParams.leftMargin;
        int right = item.getRight() + itemLayoutParams.rightMargin;
        int top = item.getBottom() + itemLayoutParams.bottomMargin;
        int bottom = top + dividerSize;
        divider.setBounds(left, top, right, bottom);
        divider.draw(c);
        if(i == 0) {
            bottom = item.getTop() + itemLayoutParams.topMargin;
            top = bottom - dividerSize;
            divider.setBounds(left, top, right, bottom);
            divider.draw(c);
        }
    }
}

Example 4

Source File: DividerItemDecoration.java From libcommon with Apache License 2.0

6 votes

@Override
public void getItemOffsets(@NonNull final Rect outRect, @NonNull final View view,
	@NonNull final RecyclerView parent, @NonNull final RecyclerView.State state) {

	final int position = parent.getChildAdapterPosition(view);
	if (mDivider == null) {
		outRect.set(0, 0, 0, 0);
	} else {
		if (hasDivider(view)) {
			if (mOrientation == VERTICAL_LIST) {
				outRect.set(0, 0, 0, mDivider.getIntrinsicHeight());
			} else {
				outRect.set(0, 0, mDivider.getIntrinsicWidth(), 0);
			}
		} else {
			outRect.set(0, 0, 0, 0);
		}
	}
}

Example 5

Source File: StickyHeaderDecoration.java From mollyim-android with GNU General Public License v3.0

5 votes

/**
 * {@inheritDoc}
 */
@Override
public void onDrawOver(@NonNull Canvas c, @NonNull RecyclerView parent, @NonNull RecyclerView.State state) {
  final int count = parent.getChildCount();

  int start = 0;
  for (int layoutPos = 0; layoutPos < count; layoutPos++) {
    final View child = parent.getChildAt(translatedChildPosition(parent, layoutPos));

    final int adapterPos = parent.getChildAdapterPosition(child);

    final long key = adapter.getHeaderId(adapterPos);
    if (key == StickyHeaderAdapter.NO_HEADER_ID) {
      start = layoutPos + 1;
    }

    if (adapterPos != RecyclerView.NO_POSITION && ((layoutPos == start && sticky) || hasHeader(parent, adapter, adapterPos))) {
      View header = getHeader(parent, adapter, adapterPos).itemView;
      c.save();
      final int left = child.getLeft();
      final int top = getHeaderTop(parent, child, header, adapterPos, layoutPos);
      c.translate(left, top);
      header.draw(c);
      c.restore();
    }
  }
}

Example 6

Source File: MyListDivider.java From Ruisi with Apache License 2.0

5 votes

public void drawVerticalLine(Canvas c, RecyclerView parent, RecyclerView.State state) {
    int top = parent.getPaddingTop();
    int bottom = parent.getHeight() - parent.getPaddingBottom();
    final int childCount = parent.getChildCount();
    for (int i = 0; i < childCount - 1; i++) {
        final View child = parent.getChildAt(i);
        //获得child的布局信息
        final RecyclerView.LayoutParams params = (RecyclerView.LayoutParams) child.getLayoutParams();
        final int left = child.getRight() + params.rightMargin;
        final int right = left + mDivider.getIntrinsicWidth();
        mDivider.setBounds(left, top + SIZE_PADDING, right, bottom - SIZE_PADDING);
        mDivider.draw(c);
    }
}

Example 7

Source File: FocusLayoutManager.java From AndroidAnimationExercise with Apache License 2.0

5 votes

@Override
public void onLayoutChildren(RecyclerView.Recycler recycler, RecyclerView.State state) {
    if (state.getItemCount() == 0) {
        removeAndRecycleAllViews(recycler);
        return;
    }

    onceCompleteScrollLength = -1;
    //分离全部已有的view，放入临时缓存
    detachAndScrapAttachedViews(recycler);

    fill(recycler, state, 0);
}

Example 8

Source File: SpacesItemDecoration2.java From Android-Video-Trimmer with Apache License 2.0

5 votes

@Override
public void getItemOffsets(Rect outRect, View view, RecyclerView parent, RecyclerView.State state) {
  int position = parent.getChildAdapterPosition(view);
  if (position == 0) {
    outRect.left = space;
    outRect.right = 0;
  } else if (thumbnailsCount > 10 && position == thumbnailsCount - 1) {
    outRect.left = 0;
    outRect.right = space;
  } else {
    outRect.left = 0;
    outRect.right = 0;
  }
}

Example 9

Source File: ScrollSmoothLineaerLayoutManager.java From UltimateRecyclerView with Apache License 2.0

5 votes

/**
 * @param recycler the object
 * @param state    the state
 */
@Override
public void onLayoutChildren(RecyclerView.Recycler recycler, RecyclerView.State state) {
    try {
        super.onLayoutChildren(recycler, state);
    } catch (Exception e) {

    }
}

Example 10

Source File: OptionsItemDecoration.java From FeatureAdapter with Apache License 2.0

5 votes

@Override
public void onDrawViewImpl(Canvas canvas, View view, RecyclerView.ViewHolder holder, RecyclerView parent, RecyclerView.State state) {
  canvas.save();
  parent.getDecoratedBoundsWithMargins(view, tempBounds);
  divider.setBounds(tempBounds.left, tempBounds.bottom - divider.getIntrinsicHeight(), tempBounds.right, tempBounds.bottom);
  divider.draw(canvas);
  canvas.restore();
}

Example 11

Source File: HeaderShadowDecoration.java From UltimateRecyclerView with Apache License 2.0

5 votes

@Override
public void onDraw(Canvas c, RecyclerView parent, RecyclerView.State state) {
    super.onDraw(c, parent, state);
    // layout basically just gets drawn on the reserved space on top of the first view
    mView.layout(parent.getLeft(), 0, parent.getRight(), mView.getMeasuredHeight());

    for (int i = 0; i < parent.getChildCount(); i++) {
        View view = parent.getChildAt(i);
        if (parent.getChildAdapterPosition(view) == 0) {
            c.save();
            if (mHorizontal) {
                c.clipRect(parent.getLeft(), parent.getTop(), view.getLeft(), parent.getBottom());
                final int width = mView.getMeasuredWidth();
                final float left = (view.getLeft() - width) * mParallax;
                c.translate(left, 0);
                mView.draw(c);
                if (mShadowSize > 0) {
                    c.translate(view.getLeft() - left - mShadowSize, 0);
                    c.drawRect(parent.getLeft(), parent.getTop(), mShadowSize, parent.getBottom(), mShadowPaint);
                }
            } else {
                c.clipRect(parent.getLeft(), parent.getTop(), parent.getRight(), view.getTop());
                final int height = mView.getMeasuredHeight();
                final float top = (view.getTop() - height) * mParallax;
                c.translate(0, top);
                mView.draw(c);
                if (mShadowSize > 0) {
                    c.translate(0, view.getTop() - top - mShadowSize);
                    c.drawRect(parent.getLeft(), parent.getTop(), parent.getRight(), mShadowSize, mShadowPaint);
                }
            }
            c.restore();
            break;
        }
    }
}

Example 12

Source File: PagingLayoutManager.java From ProjectX with Apache License 2.0

5 votes

@Override
public void onLayoutCompleted(RecyclerView.State state) {
    super.onLayoutCompleted(state);
    if (onInterceptAdjustPagingAfterLayoutComplete())
        return;
    if (mAdjustPagingAfterLayoutComplete) {
        mAdjustPagingAfterLayoutComplete = false;
        if (mPagingEnable) {
            adjustPaging(false);
        } else {
            if (mRecoveryPosition >= 0) {
                final int position = mRecoveryPosition;
                mRecoveryPosition = -1;
                final RecyclerView view = getRecyclerView();
                if (view == null)
                    return;
                final View target = findViewByPosition(position);
                if (target == null)
                    return;
                final int orientation = getOrientation();
                if (orientation == HORIZONTAL) {
                    if (target.getLeft() == mRecoveryStart)
                        return;
                    view.scrollBy(target.getLeft() - mRecoveryStart, 0);
                } else {
                    if (target.getTop() == mRecoveryStart)
                        return;
                    view.scrollBy(0, target.getTop() - mRecoveryStart);
                }
            }
        }
    }
}

Example 13

Source File: BothDirectionsScrollLayoutManager.java From ProjectX with Apache License 2.0

5 votes

@Override
public int computeVerticalScrollExtent(RecyclerView.State state) {
    if (getOrientation() == RecyclerView.VERTICAL) {
        return super.computeVerticalScrollExtent(state);
    }
    return computeVerticalScrollExtent();
}

Example 14

Source File: StickyHeaderDecoration.java From deltachat-android with GNU General Public License v3.0

5 votes

/**
 * {@inheritDoc}
 */
@Override
public void getItemOffsets(Rect outRect, View view, RecyclerView parent,
                           RecyclerView.State state)
{
  int position     = parent.getChildAdapterPosition(view);
  int headerHeight = 0;

  if (position != RecyclerView.NO_POSITION && hasHeader(parent, adapter, position)) {
    View header = getHeader(parent, adapter, position).itemView;
    headerHeight = getHeaderHeightForLayout(header);
  }

  outRect.set(0, headerHeight, 0, 0);
}

Example 15

Source File: DividerItemDecorationEx.java From NGA-CLIENT-VER-OPEN-SOURCE with GNU General Public License v2.0

5 votes

public void onDraw(@NonNull Canvas c, @NonNull RecyclerView parent, @NonNull RecyclerView.State state) {
    if (parent.getLayoutManager() != null && this.mDivider != null) {
        if (mOrientation == 1) {
            drawVertical(c, parent);
        } else {
            drawHorizontal(c, parent);
        }
    }
}

Example 16

Source File: SpacesRightItemDecoration.java From LoopBar with MIT License

4 votes

@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.right = getSpace();
}

Example 17

Source File: FlexibleItemDecoration.java From FlexibleAdapter with Apache License 2.0

4 votes

@Override
public void onDrawOver(Canvas c, RecyclerView parent, RecyclerView.State state) {
    if (mDivider != null && mDrawOver) {
        draw(c, parent);
    }
}

Example 18

Source File: ItemDecoration.java From ProjectX with Apache License 2.0

4 votes

@Override
public void getItemOffsets(@NonNull Rect outRect, @NonNull View view,
                           @NonNull RecyclerView parent, @NonNull RecyclerView.State state) {
    final int position = parent.getChildAdapterPosition(view);
    @SuppressWarnings("ConstantConditions") final int itemCount = parent.getAdapter().getItemCount();
    final RecyclerView.LayoutManager manager = parent.getLayoutManager();
    final int type = position == 0 ? TYPE_FIRST :
            (position == itemCount - 1 ? TYPE_LAST : TYPE_NORMAL);
    if (manager instanceof LinearLayoutManager &&
            ((LinearLayoutManager) manager).getOrientation() == LinearLayoutManager.HORIZONTAL) {
        outRect.top = mGap * 2;
        outRect.bottom = mGap * 2;
        switch (type) {
            default:
            case TYPE_NORMAL:
                outRect.left = mGap;
                outRect.right = mGap;
                break;
            case TYPE_FIRST:
                outRect.left = mGap * 2;
                outRect.right = mGap;
                break;
            case TYPE_LAST:
                outRect.left = mGap;
                outRect.right = mGap * 2;
                break;
        }
    } else {
        outRect.left = mGap * 2;
        outRect.right = mGap * 2;
        switch (type) {
            default:
            case TYPE_NORMAL:
                outRect.top = mGap;
                outRect.bottom = mGap;
                break;
            case TYPE_FIRST:
                outRect.top = mGap * 2;
                outRect.bottom = mGap;
                break;
            case TYPE_LAST:
                outRect.top = mGap;
                outRect.bottom = mGap * 2;
                break;
        }
    }
}

Example 19

Source File: GalleryLayoutManager.java From CardSlideView with Apache License 2.0

4 votes

@Override
public void smoothScrollToPosition(RecyclerView recyclerView, RecyclerView.State state, int position) {
    GallerySmoothScroller linearSmoothScroller = new GallerySmoothScroller(recyclerView.getContext());
    linearSmoothScroller.setTargetPosition(position);
    startSmoothScroll(linearSmoothScroller);
}

Example 20

Source File: DoubleHeaderDecoration.java From header-decor with Apache License 2.0

4 votes

/**
 * {@inheritDoc}
 */
@Override
public void onDrawOver(@NonNull Canvas canvas, @NonNull RecyclerView parent,
        @NonNull RecyclerView.State state) {

    final int count = parent.getChildCount();

    boolean headerDrawn = false;
    for (int layoutPos = 0; layoutPos < count; layoutPos++) {
        final View child = parent.getChildAt(layoutPos);
        boolean visible = getAnimatedTop(child) > -child.getHeight();
        final int adapterPos = parent.getChildAdapterPosition(child);

        if (visible && adapterPos != RecyclerView.NO_POSITION
                && (!headerDrawn || hasSubHeader(adapterPos))) {
            int left, top;
            final View header = getHeader(parent, adapterPos).itemView;
            final View subHeader = getSubHeader(parent, adapterPos).itemView;

            canvas.save();
            left = child.getLeft();
            top = getSubHeaderTop(parent, child, header, subHeader, adapterPos, layoutPos);
            canvas.translate(left, top);
            subHeader.setTranslationX(left);
            subHeader.setTranslationY(top);
            subHeader.draw(canvas);
            canvas.restore();

            if (!headerDrawn || hasHeader(adapterPos)) {
                canvas.save();
                left = child.getLeft();
                top = getHeaderTop(parent, child, header, subHeader, adapterPos, layoutPos);
                canvas.translate(left, top);
                header.setTranslationX(left);
                header.setTranslationY(top);
                header.draw(canvas);
                canvas.restore();
            }

            headerDrawn = true;
        }
    }
}