Android RecyclerView实现横向网格翻页功能

网格翻页功能"/>

Android RecyclerView实现横向网格翻页功能

Android RecyclerView实现横向网格翻页功能

效果：

最近新入职一家公司做项目优化，发现一个功能列表（类似于手机桌面）使用ViewPager+Fragment+RecyclerView嵌套实现
嵌套的太多，看的我浑身难受

话不多说直接上代码。

首先定义一个翻页的Helper

public class PagingScrollHelper {RecyclerView mRecyclerView = null;private MyOnScrollListener mOnScrollListener = new MyOnScrollListener();private MyOnFlingListener mOnFlingListener = new MyOnFlingListener();private int offsetY = 0;private int offsetX = 0;int startY = 0;int startX = 0;enum ORIENTATION {HORIZONTAL, VERTICAL, NULL}private ORIENTATION mOrientation = ORIENTATION.HORIZONTAL;public void setUpRecycleView(RecyclerView recycleView) {if (recycleView == null) {throw new IllegalArgumentException("recycleView must be not null");}mRecyclerView = recycleView;//处理滑动recycleView.setOnFlingListener(mOnFlingListener);//设置滚动监听，记录滚动的状态，和总的偏移量recycleView.setOnScrollListener(mOnScrollListener);//记录滚动开始的位置recycleView.setOnTouchListener(mOnTouchListener);//获取滚动的方向updateLayoutManger();}public void updateLayoutManger() {RecyclerView.LayoutManager layoutManager = mRecyclerView.getLayoutManager();if (layoutManager != null) {if (layoutManager.canScrollVertically()) {mOrientation = ORIENTATION.VERTICAL;} else if (layoutManager.canScrollHorizontally()) {mOrientation = ORIENTATION.HORIZONTAL;} else {mOrientation = ORIENTATION.NULL;}if (mAnimator != null) {mAnimator.cancel();}startX = 0;startY = 0;offsetX = 0;offsetY = 0;}}/*** 获取总共的页数*/public int getPageCount() {if (mRecyclerView != null) {if (mOrientation == ORIENTATION.NULL) {return 0;}if (mOrientation == ORIENTATION.VERTICAL && mRecyclerViewputeVerticalScrollExtent() != 0) {return mRecyclerViewputeVerticalScrollRange() / mRecyclerViewputeVerticalScrollExtent();} else if (mRecyclerViewputeHorizontalScrollExtent() != 0) {return mRecyclerViewputeHorizontalScrollRange() / mRecyclerViewputeHorizontalScrollExtent();}}return 0;}ValueAnimator mAnimator = null;public void scrollToPosition(int position) {if (mAnimator == null) {mOnFlingListener.onFling(0, 0);}if (mAnimator != null) {int startPoint = mOrientation == ORIENTATION.VERTICAL ? offsetY : offsetX, endPoint = 0;if (mOrientation == ORIENTATION.VERTICAL) {endPoint = mRecyclerView.getHeight() * position;} else {endPoint = mRecyclerView.getWidth() * position;}if (startPoint != endPoint) {mAnimator.setIntValues(startPoint, endPoint);mAnimator.start();}}}public class MyOnFlingListener extends RecyclerView.OnFlingListener {@Overridepublic boolean onFling(int velocityX, int velocityY) {if (mOrientation == ORIENTATION.NULL) {return false;}//获取开始滚动时所在页面的indexint p = getStartPageIndex();//记录滚动开始和结束的位置int endPoint = 0;int startPoint = 0;//如果是垂直方向if (mOrientation == ORIENTATION.VERTICAL) {startPoint = offsetY;