当前位置: 首页>>代码示例>>Java>>正文

Java RecyclerView.scrollBy方法代码示例

本文整理汇总了Java中android.support.v7.widget.RecyclerView.scrollBy方法的典型用法代码示例。如果您正苦于以下问题：Java RecyclerView.scrollBy方法的具体用法？Java RecyclerView.scrollBy怎么用？Java RecyclerView.scrollBy使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类android.support.v7.widget.RecyclerView的用法示例。


在下文中一共展示了RecyclerView.scrollBy方法的8个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Java代码示例。

示例1: handleDragScroll

import android.support.v7.widget.RecyclerView; //导入方法依赖的package包/类
@TargetApi(Build.VERSION_CODES.ICE_CREAM_SANDWICH)
void handleDragScroll(RecyclerView rv, DragInfo dragInfo) {
    if (rv.getLayoutManager().canScrollHorizontally()) {
        if (rv.canScrollHorizontally(-1) && dragInfo.shouldScrollLeft()) {
            rv.scrollBy(-SCROLL_AMOUNT, 0);
            dragManager.clearNextMove();
        } else if (rv.canScrollHorizontally(1) && dragInfo.shouldScrollRight(rv.getWidth())) {
            rv.scrollBy(SCROLL_AMOUNT, 0);
            dragManager.clearNextMove();
        }
    } else if (rv.getLayoutManager().canScrollVertically()) {
        if (rv.canScrollVertically(-1) && dragInfo.shouldScrollUp()) {
            rv.scrollBy(0, -SCROLL_AMOUNT);
            dragManager.clearNextMove();
        } else if (rv.canScrollVertically(1) && dragInfo.shouldScrollDown(rv.getHeight())) {
            rv.scrollBy(0, SCROLL_AMOUNT);
            dragManager.clearNextMove();
        }
    }
}
开发者ID:weiwenqiang，项目名称:GitHub，代码行数:21，代码来源:DragSortAdapter.java

示例2: scrollIfNecessary

import android.support.v7.widget.RecyclerView; //导入方法依赖的package包/类
/**
     * 当用户滚动到边缘的时候,计算是否需要滚动
     */
    private boolean scrollIfNecessary(RecyclerView recyclerView, int curX, int curY) {
        if (!isDrag) {
            return false;
        }

        RecyclerView.LayoutManager lm = recyclerView.getLayoutManager();
        int scrollX = 0;
        int scrollY = 0;
        if (lm.canScrollHorizontally()) {
            scrollX = dragListener.calcHorizontalScrollDistance(recyclerView, curX, curY);
        }
        if (lm.canScrollVertically()) {
            scrollY = dragListener.calcVerticalScrollDistance(recyclerView, curX, curY);
        }
//        System.out.println("scroll:::::" + scrollY + "=" + recyclerView.getScrollY() + "curY::" + curY);
//        System.out.println("scroll:::::" + scrollX + "=" + recyclerView.getScrollX() + "curX::" + curX);

        if (scrollX != 0 || scrollY != 0) {
            recyclerView.scrollBy(scrollX, scrollY);
        }
        return scrollX != 0 || scrollY != 0;
    }
开发者ID:free46000，项目名称:MultiItem，代码行数:26，代码来源:ItemDragHelper.java

示例3: onScrolled

import android.support.v7.widget.RecyclerView; //导入方法依赖的package包/类
@Override
public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
    super.onScrolled(recyclerView, dx, dy);
    //在这里进行第二次滚动（最后的100米！）
    if (move) {
        move = false;
        //获取要置顶的项在当前屏幕的位置，mIndex是记录的要置顶项在RecyclerView中的位置
        LinearLayoutManager mLinearLayoutManager = (LinearLayoutManager) layoutManager;
        int n = mIndex - mLinearLayoutManager.findFirstVisibleItemPosition();
        if (0 <= n && n < recyclerView.getChildCount()) {
            //获取要置顶的项顶部离RecyclerView顶部的距离
            int top = recyclerView.getChildAt(n).getTop();
            //最后的移动
            recyclerView.scrollBy(0, top);
        }
    }
}
开发者ID:ebridfighter，项目名称:GongXianSheng，代码行数:18，代码来源:RefreshRecyclerView.java

示例4: syncOffset

import android.support.v7.widget.RecyclerView; //导入方法依赖的package包/类
public static boolean syncOffset(SmoothAppBarLayout smoothAppBarLayout, View target, int verticalOffset, View scroll) {
  boolean isSelected = target == scroll;
  if (scroll instanceof NestedScrollView) {
    NestedScrollView nestedScrollView = (NestedScrollView) scroll;
    if (nestedScrollView.getScrollY() < verticalOffset || (!isSelected && isScrollToTop(target))) {
      nestedScrollView.scrollTo(0, verticalOffset);
    }
    if (isSelected && (nestedScrollView.getScrollY() < verticalOffset || verticalOffset == 0)) {
      nestedScrollView.scrollTo(0, 0);
      smoothAppBarLayout.syncOffset(0);
    }
  } else if (scroll instanceof RecyclerView) {
    RecyclerView recyclerView = (RecyclerView) scroll;
    boolean isAccuracy = recyclerView.getLayoutManager().findViewByPosition(ObservableRecyclerView.HEADER_VIEW_POSITION) != null;
    if (isAccuracy && recyclerView.computeVerticalScrollOffset() < verticalOffset) {
      recyclerView.scrollBy(0, verticalOffset - recyclerView.computeVerticalScrollOffset());
    } else if (!isSelected && isScrollToTop(target)) {
      recyclerView.scrollToPosition(ObservableRecyclerView.HEADER_VIEW_POSITION);
    }
    if (isAccuracy && isSelected && (recyclerView.computeVerticalScrollOffset() < verticalOffset || verticalOffset == 0)) {
      recyclerView.scrollToPosition(ObservableRecyclerView.HEADER_VIEW_POSITION);
      smoothAppBarLayout.syncOffset(0);
    }
  }
  return true;
}
开发者ID:PacktPublishing，项目名称:Expert-Android-Programming，代码行数:27，代码来源:Utils.java

示例5: onTouchEvent

import android.support.v7.widget.RecyclerView; //导入方法依赖的package包/类
@Override
public void onTouchEvent(RecyclerView rv, MotionEvent e) {
    debugLog("onTouchEvent");

    if ((e.getAction() == MotionEvent.ACTION_UP) ||
            (e.getAction() == MotionEvent.ACTION_CANCEL)) {
        if ((e.getAction() == MotionEvent.ACTION_UP) && selectedDragItemPos != -1) {
            int newPos = getNewPostion(rv);
            if (moveInterface != null)
                moveInterface.onItemMoved(selectedDragItemPos, newPos);
        }

        setIsDragging(false);
        selectedDragItemPos = -1;
        floatingItem = null;
        rv.invalidateItemDecorations();
        return;
    }


    fingerY = (int) e.getY();

    if (floatingItem != null) {
        floatingItemBounds.top = fingerY - fingerOffsetInViewY;

        if (floatingItemBounds.top < -floatingItemStatingBounds.height() / 2) //Allow half the view out the top
            floatingItemBounds.top = -floatingItemStatingBounds.height() / 2;

        floatingItemBounds.bottom = floatingItemBounds.top + floatingItemStatingBounds.height();

        floatingItem.setBounds(floatingItemBounds);
    }

    //Do auto scrolling at end of list
    float scrollAmount = 0;
    if (fingerY > (rv.getHeight() * (1 - autoScrollWindow))) {
        scrollAmount = (fingerY - (rv.getHeight() * (1 - autoScrollWindow)));
    } else if (fingerY < (rv.getHeight() * autoScrollWindow)) {
        scrollAmount = (fingerY - (rv.getHeight() * autoScrollWindow));
    }
    debugLog("Scroll: " + scrollAmount);

    scrollAmount *= autoScrollSpeed;
    rv.scrollBy(0, (int) scrollAmount);

    rv.invalidateItemDecorations();// Redraw
}
开发者ID:Vinetos，项目名称:Hello-Music-droid，代码行数:48，代码来源:DragSortRecycler.java

示例6: performAction

import android.support.v7.widget.RecyclerView; //导入方法依赖的package包/类
@Override
public void performAction(UiController uiController, RecyclerView recyclerView) {
    recyclerView.scrollBy(x, y);
}
开发者ID:sathishmscict，项目名称:ChipsLayoutManager，代码行数:5，代码来源:RecyclerViewEspressoFactory.java

示例7: scrollIfNecessary

import android.support.v7.widget.RecyclerView; //导入方法依赖的package包/类
/**
 * If user drags the view to the edge, trigger a scroll if necessary.
 */
private boolean scrollIfNecessary() {
    RecyclerView recyclerView = null;
    if ((mRegion & IN_MAIN_REGION) != 0) {
        recyclerView = mMainRecyclerView;
    }
    if ((mRegion & IN_SUB_REGION) != 0) {
        recyclerView = mSubRecyclerView;
    }
    if (recyclerView == null) return false;
    final long now = System.currentTimeMillis();
    final long scrollDuration = mDragScrollStartTimeInMs
            == Long.MIN_VALUE ? 0 : now - mDragScrollStartTimeInMs;
    RecyclerView.LayoutManager lm = recyclerView.getLayoutManager();

    int scrollX = 0;
    int scrollY = 0;
    if (lm.canScrollHorizontally()) {
        int curX = (int) (mSelectedStartX + mDx);
        final int leftDiff = curX - mEdgeWidth - recyclerView.getPaddingLeft();
        if (mDx < 0 && leftDiff < 0) {
            scrollX = leftDiff;
        } else if (mDx > 0) {
            final int rightDiff =
                    curX + mSelected.getWidth() + mEdgeWidth - (recyclerView.getWidth() - recyclerView.getPaddingRight());
            if (rightDiff > 0) {
                scrollX = rightDiff;
            }
        }
    }
    if (lm.canScrollVertically()) {
        int curY = (int) (mSelectedStartY + mDy);
        final int topDiff = curY - mEdgeWidth - recyclerView.getPaddingTop();
        if (mDy < 0 && topDiff < 0) {
            scrollY = topDiff;
        } else if (mDy > 0) {
            final int bottomDiff = curY + mSelected.getHeight() + mEdgeWidth -
                    (recyclerView.getHeight() - recyclerView.getPaddingBottom());
            if (bottomDiff > 0) {
                scrollY = bottomDiff;
            }
        }
    }
    if (scrollX != 0) {
        scrollX = interpolateOutOfBoundsScroll(recyclerView,
                mSelected.getWidth(), scrollX,
                recyclerView.getWidth(), scrollDuration);
    }
    if (scrollY != 0) {
        scrollY = interpolateOutOfBoundsScroll(recyclerView,
                mSelected.getHeight(), scrollY,
                recyclerView.getHeight(), scrollDuration);
    }
    if (scrollX != 0 || scrollY != 0) {
        if (mDragScrollStartTimeInMs == Long.MIN_VALUE) {
            mDragScrollStartTimeInMs = now;
        }
        recyclerView.scrollBy(scrollX, scrollY);
        return true;
    }
    mDragScrollStartTimeInMs = Long.MIN_VALUE;
    return false;
}
开发者ID:AlphaBoom，项目名称:ClassifyView，代码行数:66，代码来源:ClassifyView.java

示例8: scrollRecyclerViewToMiddle

import android.support.v7.widget.RecyclerView; //导入方法依赖的package包/类
private void scrollRecyclerViewToMiddle(RecyclerView recyclerView, int position){
    LinearLayoutManager layoutManager = (LinearLayoutManager) recyclerView.getLayoutManager();
    int left = recyclerView.getChildAt(position - layoutManager.findFirstVisibleItemPosition()).getLeft();
    int right = recyclerView.getChildAt(layoutManager.findLastVisibleItemPosition() - position).getLeft();
    recyclerView.scrollBy((left - right)/2,0);
}
开发者ID:unweixiaoyy，项目名称:IndicatorRecyclerDecoration，代码行数:7，代码来源:TRecyclerActivity.java


注：本文中的android.support.v7.widget.RecyclerView.scrollBy方法示例由纯净天空整理自Github/MSDocs等开源代码及文档管理平台，相关代码片段筛选自各路编程大神贡献的开源项目，源码版权归原作者所有，传播和使用请参考对应项目的License；未经允许，请勿转载。