android.support.v7.widget.OrientationHelper#createVerticalHelper ( )源码实例Demo

下面列出了android.support.v7.widget.OrientationHelper#createVerticalHelper ( ) 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： MultiItem 文件： ItemDragHelper.java

/**
     * 当item位置变换，滚动recycler到正确的位置
     * TODO: 2017/2/21 0021 整理更优雅的写法  还有scrollToPosition(0)是否必要？
     */
    private void scrollToRightPositionWhenItemChanged(RecyclerView recyclerView, View itemView, int itemPos) {
        final RecyclerView.LayoutManager layoutManager = recyclerView.getLayoutManager();
        if (layoutManager instanceof ItemTouchHelper.ViewDropHandler) {
            OrientationHelper helper = OrientationHelper.createVerticalHelper(layoutManager);
            int start = helper.getDecoratedStart(itemView);
            int end = helper.getDecoratedEnd(itemView);
            ((LinearLayoutManager) layoutManager).scrollToPositionWithOffset(
                    itemPos, lastItemPos > itemPos ? start : end - itemViewHeight);
//                System.out.println(lastItemPos + "-" + childPos + "OrientationHelperOrientationHelper:"
//                        + height + "==" + itemViewHeight + "=||=" + start + "===" + end + "||||||" + myStart + "===" + itemTargetView.getHeight() );
        }
        if (lastItemPos == 0 || itemPos == 0) {
            recyclerView.scrollToPosition(0);
        }
    }

源代码2 项目： YCScrollPager 文件： ScrollPageHelper.java

@NonNull
private OrientationHelper getVerticalHelper(@NonNull RecyclerView.LayoutManager layoutManager) {
    if (mVerticalHelper == null) {
        mVerticalHelper = OrientationHelper.createVerticalHelper(layoutManager);
    }
    return mVerticalHelper;
}

源代码3 项目： Ticket-Analysis 文件： RecyclerViewPositionHelper.java

View findOneVisibleChild(int fromIndex, int toIndex, boolean completelyVisible,
                         boolean acceptPartiallyVisible) {
    OrientationHelper helper;
    if (layoutManager.canScrollVertically()) {
        helper = OrientationHelper.createVerticalHelper(layoutManager);
    } else {
        helper = OrientationHelper.createHorizontalHelper(layoutManager);
    }

    final int start = helper.getStartAfterPadding();
    final int end = helper.getEndAfterPadding();
    final int next = toIndex > fromIndex ? 1 : -1;
    View partiallyVisible = null;
    for (int i = fromIndex; i != toIndex; i += next) {
        final View child = layoutManager.getChildAt(i);
        final int childStart = helper.getDecoratedStart(child);
        final int childEnd = helper.getDecoratedEnd(child);
        if (childStart < end && childEnd > start) {
            if (completelyVisible) {
                if (childStart >= start && childEnd <= end) {
                    return child;
                } else if (acceptPartiallyVisible && partiallyVisible == null) {
                    partiallyVisible = child;
                }
            } else {
                return child;
            }
        }
    }
    return partiallyVisible;
}

源代码4 项目： YCBanner 文件： GalleryLayoutManager.java

private OrientationHelper getOrientationHelper() {
    if (mOrientation == HORIZONTAL) {
        if (mHorizontalHelper == null) {
            mHorizontalHelper = OrientationHelper.createHorizontalHelper(this);
        }
        return mHorizontalHelper;
    } else {
        if (mVerticalHelper == null) {
            mVerticalHelper = OrientationHelper.createVerticalHelper(this);
        }
        return mVerticalHelper;
    }
}

源代码5 项目： YCBanner 文件： ScrollPageHelper.java

@NonNull
private OrientationHelper getVerticalHelper(@NonNull RecyclerView.LayoutManager layoutManager) {
    if (mVerticalHelper == null) {
        mVerticalHelper = OrientationHelper.createVerticalHelper(layoutManager);
    }
    return mVerticalHelper;
}

源代码6 项目： YCBanner 文件： ScrollLinearHelper.java

@NonNull
private OrientationHelper getVerticalHelper(@NonNull RecyclerView.LayoutManager layoutManager) {
    if (mVerticalHelper == null) {
        mVerticalHelper = OrientationHelper.createVerticalHelper(layoutManager);
    }
    return mVerticalHelper;
}

源代码7 项目： iGap-Android 文件： EndlessRecyclerOnScrollListener.java

private View findOneVisibleChild(int fromIndex, int toIndex, boolean completelyVisible, boolean acceptPartiallyVisible) {
    if (mLayoutManager.canScrollVertically() != mIsOrientationHelperVertical || mOrientationHelper == null) {
        mIsOrientationHelperVertical = mLayoutManager.canScrollVertically();
        mOrientationHelper = mIsOrientationHelperVertical ? OrientationHelper.createVerticalHelper(mLayoutManager) : OrientationHelper.createHorizontalHelper(mLayoutManager);
    }

    final int start = mOrientationHelper.getStartAfterPadding();
    final int end = mOrientationHelper.getEndAfterPadding();
    final int next = toIndex > fromIndex ? 1 : -1;
    View partiallyVisible = null;
    for (int i = fromIndex; i != toIndex; i += next) {
        final View child = mLayoutManager.getChildAt(i);
        if (child != null) {
            final int childStart = mOrientationHelper.getDecoratedStart(child);
            final int childEnd = mOrientationHelper.getDecoratedEnd(child);
            if (childStart < end && childEnd > start) {
                if (completelyVisible) {
                    if (childStart >= start && childEnd <= end) {
                        return child;
                    } else if (acceptPartiallyVisible && partiallyVisible == null) {
                        partiallyVisible = child;
                    }
                } else {
                    return child;
                }
            }
        }
    }
    return partiallyVisible;
}

源代码8 项目： YCRefreshView 文件： ScrollPageHelper.java

@NonNull
private OrientationHelper getVerticalHelper(@NonNull RecyclerView.LayoutManager layoutManager) {
    if (mVerticalHelper == null) {
        mVerticalHelper = OrientationHelper.createVerticalHelper(layoutManager);
    }
    return mVerticalHelper;
}

源代码9 项目： GalleryLayoutManager 文件： GalleryLayoutManager.java

public OrientationHelper getOrientationHelper() {
    if (mOrientation == HORIZONTAL) {
        if (mHorizontalHelper == null) {
            mHorizontalHelper = OrientationHelper.createHorizontalHelper(this);
        }
        return mHorizontalHelper;
    } else {
        if (mVerticalHelper == null) {
            mVerticalHelper = OrientationHelper.createVerticalHelper(this);
        }
        return mVerticalHelper;
    }
}

源代码10 项目： PullLoadView 文件： RecyclerViewPositionHelper.java

public View findOneVisibleChild(int fromIndex, int toIndex, boolean completelyVisible,
                         boolean acceptPartiallyVisible) {
    OrientationHelper helper;
    if (layoutManager.canScrollVertically()) {
        helper = OrientationHelper.createVerticalHelper(layoutManager);
    } else {
        helper = OrientationHelper.createHorizontalHelper(layoutManager);
    }

    final int start = helper.getStartAfterPadding();
    final int end = helper.getEndAfterPadding();
    final int next = toIndex > fromIndex ? 1 : -1;
    View partiallyVisible = null;
    for (int i = fromIndex; i != toIndex; i += next) {
        final View child = layoutManager.getChildAt(i);
        final int childStart = helper.getDecoratedStart(child);
        final int childEnd = helper.getDecoratedEnd(child);
        if (childStart < end && childEnd > start) {
            if (completelyVisible) {
                if (childStart >= start && childEnd <= end) {
                    return child;
                } else if (acceptPartiallyVisible && partiallyVisible == null) {
                    partiallyVisible = child;
                }
            } else {
                return child;
            }
        }
    }
    return partiallyVisible;
}

源代码11 项目： KAM 文件： RecyclerViewPositionHelper.java

View findOneVisibleChild(int fromIndex, int toIndex, boolean completelyVisible, boolean acceptPartiallyVisible) {
    OrientationHelper helper;
    if (layoutManager.canScrollVertically()) {
        helper = OrientationHelper.createVerticalHelper(layoutManager);
    } else {
        helper = OrientationHelper.createHorizontalHelper(layoutManager);
    }

    final int start = helper.getStartAfterPadding();
    final int end = helper.getEndAfterPadding();
    final int next = toIndex > fromIndex ? 1 : -1;
    View partiallyVisible = null;
    for (int i = fromIndex; i != toIndex; i += next) {
        final View child = layoutManager.getChildAt(i);
        final int childStart = helper.getDecoratedStart(child);
        final int childEnd = helper.getDecoratedEnd(child);
        if (childStart < end && childEnd > start) {
            if (completelyVisible) {
                if (childStart >= start && childEnd <= end) {
                    return child;
                } else if (acceptPartiallyVisible && partiallyVisible == null) {
                    partiallyVisible = child;
                }
            } else {
                return child;
            }
        }
    }
    return partiallyVisible;
}

源代码12 项目： mugen 文件： RecyclerViewPositionHelper.java

View findOneVisibleChild(int fromIndex, int toIndex, boolean completelyVisible,
                         boolean acceptPartiallyVisible) {
    OrientationHelper helper;
    if (layoutManager.canScrollVertically()) {
        helper = OrientationHelper.createVerticalHelper(layoutManager);
    } else {
        helper = OrientationHelper.createHorizontalHelper(layoutManager);
    }

    final int start = helper.getStartAfterPadding();
    final int end = helper.getEndAfterPadding();
    final int next = toIndex > fromIndex ? 1 : -1;
    View partiallyVisible = null;
    for (int i = fromIndex; i != toIndex; i += next) {
        final View child = layoutManager.getChildAt(i);
        final int childStart = helper.getDecoratedStart(child);
        final int childEnd = helper.getDecoratedEnd(child);
        if (childStart < end && childEnd > start) {
            if (completelyVisible) {
                if (childStart >= start && childEnd <= end) {
                    return child;
                } else if (acceptPartiallyVisible && partiallyVisible == null) {
                    partiallyVisible = child;
                }
            } else {
                return child;
            }
        }
    }
    return partiallyVisible;
}

源代码13 项目： Dagger2-Sample 文件： PagerSnapHelper.java

private OrientationHelper getVerticalHelper(RecyclerView.LayoutManager layoutManager) {
    if (mVerticalHelper == null) {
        mVerticalHelper = OrientationHelper.createVerticalHelper(layoutManager);
    }
    return mVerticalHelper;
}

源代码14 项目： Orin 文件： GravityDelegate.java

private OrientationHelper getVerticalHelper(RecyclerView.LayoutManager layoutManager) {
    if (verticalHelper == null) {
        verticalHelper = OrientationHelper.createVerticalHelper(layoutManager);
    }
    return verticalHelper;
}

源代码15 项目： SimpleRecyclerView 文件： StartSnapHelper.java

private OrientationHelper getVerticalHelper(RecyclerView.LayoutManager layoutManager) {
  if (verticalHelper == null) {
    verticalHelper = OrientationHelper.createVerticalHelper(layoutManager);
  }
  return verticalHelper;
}

源代码16 项目： MangoBloggerAndroidApp 文件： GravitySnapHelper.java

private OrientationHelper getVerticalHelper(RecyclerView.LayoutManager layoutManager) {
    if (mVerticalHelper == null) {
        mVerticalHelper = OrientationHelper.createVerticalHelper(layoutManager);
    }
    return mVerticalHelper;
}

源代码17 项目： Capstone-Project 文件： StartSnapHelper.java

private OrientationHelper getVerticalHelper(RecyclerView.LayoutManager layoutManager) {
    if (mVerticalHelper == null) {
        mVerticalHelper = OrientationHelper.createVerticalHelper(layoutManager);
    }
    return mVerticalHelper;
}

源代码18 项目： date_picker_converter 文件： GravitySnapHelper.java

private OrientationHelper getVerticalHelper(RecyclerView.LayoutManager layoutManager) {
    if (verticalHelper == null) {
        verticalHelper = OrientationHelper.createVerticalHelper(layoutManager);
    }
    return verticalHelper;
}

源代码19 项目： SuntimesWidget 文件： GravitySnapHelper.java

private OrientationHelper getVerticalHelper(RecyclerView.LayoutManager layoutManager) {
    if (verticalHelper == null) { // || verticalHelper.getLayoutManager() != layoutManager) {
        verticalHelper = OrientationHelper.createVerticalHelper(layoutManager);
    }
    return verticalHelper;
}

方法所在类

android.support.v7.widget.OrientationHelper