NestedScrollView嵌套RecycleView滑动冲突解决办法

解决办法：

---

1.简单的方法

首先把design库和V7库升级到23.2以上，然后添加如下代码

linearLayoutManager.setSmoothScrollbarEnabled(true);
linearLayoutManager.setAutoMeasureEnabled(true);
recyclerView.setLayoutManager(linearLayoutManager);
recyclerView.setHasFixedSize(true);
recyclerView.setNestedScrollingEnabled(false);

经验证好用。。。

2.比较麻烦的，重写LinearLayoutManager和NestedScrollView

public class CustomLinearLayoutManager extends LinearLayoutManager {  
  
    public CustomLinearLayoutManager(Context context, int orientation, boolean reverseLayout) {  
        super(context, orientation, reverseLayout);  
    }  
  
    private int[] mMeasuredDimension = new int[2];  
  
    @Override  
    public void onMeasure(RecyclerView.Recycler recycler, RecyclerView.State state,  
                          int widthSpec, int heightSpec) {  
        final int widthMode = View.MeasureSpec.getMode(widthSpec);  
        final int heightMode = View.MeasureSpec.getMode(heightSpec);  
        final int widthSize = View.MeasureSpec.getSize(widthSpec);  
        final int heightSize = View.MeasureSpec.getSize(heightSpec);  
        int width = 0;  
        int height = 0;  
        for (int i = 0; i < getItemCount(); i++) {  
            if (getOrientation() == HORIZONTAL) {  
                measureScrapChild(recycler, i,  
                        View.MeasureSpec.makeMeasureSpec(i, View.MeasureSpec.UNSPECIFIED),  
                        heightSpec,  
                        mMeasuredDimension);  
  
                width = width + mMeasuredDimension[0];  
                if (i == 0) {  
                    height = mMeasuredDimension[1];  
                }  
            } else {  
                measureScrapChild(recycler, i,  
                        widthSpec,  
                        View.MeasureSpec.makeMeasureSpec(i, View.MeasureSpec.UNSPECIFIED),  
                        mMeasuredDimension);  
                height = height + mMeasuredDimension[1];  
                if (i == 0) {  
                    width = mMeasuredDimension[0];  
                }  
            }  
        }  
        switch (widthMode) {  
            case View.MeasureSpec.EXACTLY:  
                width = widthSize;  
            case View.MeasureSpec.AT_MOST:  
            case View.MeasureSpec.UNSPECIFIED:  
        }  
  
        switch (heightMode) {  
            case View.MeasureSpec.EXACTLY:  
                height = heightSize;  
            case View.MeasureSpec.AT_MOST:  
            case View.MeasureSpec.UNSPECIFIED:  
        }  
  
        setMeasuredDimension(width, height);  
    }  
  
    private void measureScrapChild(RecyclerView.Recycler recycler, int position, int widthSpec,  
                                   int heightSpec, int[] measuredDimension) {  
        View view = recycler.getViewForPosition(position);  
        recycler.bindViewToPosition(view, position);  
        if (view != null) {  
            RecyclerView.LayoutParams p = (RecyclerView.LayoutParams) view.getLayoutParams();  
            int childWidthSpec = ViewGroup.getChildMeasureSpec(widthSpec,  
                    getPaddingLeft() + getPaddingRight(), p.width);  
            int childHeightSpec = ViewGroup.getChildMeasureSpec(heightSpec,  
                    getPaddingTop() + getPaddingBottom(), p.height);  
            view.measure(childWidthSpec, childHeightSpec);  
            measuredDimension[0] = view.getMeasuredWidth() + p.leftMargin + p.rightMargin;  
            measuredDimension[1] = view.getMeasuredHeight() + p.bottomMargin + p.topMargin;  
            recycler.recycleView(view);  
        }  
    }  
  
} 

public class MyNestedScrollView extends NestedScrollView {    
    private int downX;    
    private int downY;    
    private int mTouchSlop;    
    
    public MyNestedScrollView(Context context) {    
        super(context);    
        mTouchSlop = ViewConfiguration.get(context).getScaledTouchSlop();    
    }    
    
    public MyNestedScrollView(Context context, AttributeSet attrs) {    
        super(context, attrs);    
        mTouchSlop = ViewConfiguration.get(context).getScaledTouchSlop();    
    }    
    
    public MyNestedScrollView(Context context, AttributeSet attrs, int defStyleAttr) {    
        super(context, attrs, defStyleAttr);    
        mTouchSlop = ViewConfiguration.get(context).getScaledTouchSlop();    
    }    
    
    @Override    
    public boolean onInterceptTouchEvent(MotionEvent e) {    
        int action = e.getAction();    
        switch (action) {    
            case MotionEvent.ACTION_DOWN:    
                downX = (int) e.getRawX();    
                downY = (int) e.getRawY();    
                break;    
            case MotionEvent.ACTION_MOVE:    
                int moveY = (int) e.getRawY();    
                if (Math.abs(moveY - downY) > mTouchSlop) {    
                    return true;    
                }    
        }    
        return super.onInterceptTouchEvent(e);    
    }    
}