androidx.recyclerview.widget.RecyclerView#State ( )源码实例Demo

下面列出了androidx.recyclerview.widget.RecyclerView#State ( ) 实例代码，或者点击链接到github查看源代码，也可以在右侧发表评论。

源代码1 项目： UltimateRecyclerView 文件： HeaderShadowDecoration.java

@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();
    }
}

源代码2 项目： QuickDevFramework 文件： HorizontalDecoration.java

@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);
        }
    }
}

源代码3 项目： libcommon 文件： DividerItemDecoration.java

@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);
		}
	}
}

源代码4 项目： Matisse 文件： MediaGridInset.java

@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
        }
    }
}

源代码5 项目： mollyim-android 文件： StickyHeaderDecoration.java

/**
 * {@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();
    }
  }
}

源代码6 项目： NGA-CLIENT-VER-OPEN-SOURCE 文件： DividerItemDecorationEx.java

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);
        }
    }
}

源代码7 项目： deltachat-android 文件： StickyHeaderDecoration.java

/**
 * {@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);
}

源代码8 项目： ProjectX 文件： BothDirectionsScrollLayoutManager.java

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

源代码9 项目： ProjectX 文件： PagingLayoutManager.java

@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);
                }
            }
        }
    }
}

源代码10 项目： UltimateRecyclerView 文件： HeaderShadowDecoration.java

@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;
        }
    }
}

源代码11 项目： FeatureAdapter 文件： OptionsItemDecoration.java

@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();
}

源代码12 项目： UltimateRecyclerView 文件： ScrollSmoothLineaerLayoutManager.java

/**
 * @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) {

    }
}

源代码13 项目： Android-Video-Trimmer 文件： SpacesItemDecoration2.java

@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;
  }
}

源代码14 项目： AndroidAnimationExercise 文件： FocusLayoutManager.java

@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);
}

源代码15 项目： Ruisi 文件： MyListDivider.java

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);
    }
}

源代码16 项目： CardSlideView 文件： GalleryLayoutManager.java

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

源代码17 项目： ProjectX 文件： ItemDecoration.java

@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;
        }
    }
}

源代码18 项目： LoopBar 文件： SpacesRightItemDecoration.java

@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();
}

源代码19 项目： FlexibleAdapter 文件： FlexibleItemDecoration.java

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

源代码20 项目： header-decor 文件： DoubleHeaderDecoration.java

/**
 * {@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;
        }
    }
}

方法所在类

androidx.recyclerview.widget.RecyclerView