RecyclerView 与 ScrollView嵌套

在使用RecyclerView和ScrollView 的时候，会遇见几个问题。

RecyclerView 显示不全；RecyclerView 与ScrollView 滑动冲突；嵌套布局不显示在顶部，直接显示RecyclerView 第一个item

解决办法是：

重写布局管理器，例如重写垂直布局LinearLayoutManager

import android.content.Context;import android.support.v7.widget.LinearLayoutManager;import android.support.v7.widget.RecyclerView;import android.view.View;import android.view.ViewGroup;public class AutoLinearLayoutManager extends LinearLayoutManager {private static final String TAG = AutoLinearLayoutManager.class.getSimpleName();    public AutoLinearLayoutManager(Context context) {      super(context);   }public AutoLinearLayoutManager(Context context, int orientation,boolean reverseLayout) {       super(context, orientation, reverseLayout);}private int[] mMeasuredDimension = new int[2];@Overridepublic 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++) {measureScrapChild(recycler, i,View.MeasureSpec.makeMeasureSpec(i, View.MeasureSpec.UNSPECIFIED),                    View.MeasureSpec.makeMeasureSpec(i, View.MeasureSpec.UNSPECIFIED),                    mMeasuredDimension);if (getOrientation() == HORIZONTAL) {width = width + mMeasuredDimension[0];if (i == 0) {height = mMeasuredDimension[1];  } } else {  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) {try { View view = recycler.getViewForPosition(0);  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);           } } catch (Exception e) { e.printStackTrace();  } finally { }}}

同时ScrollView 布局设置属性
android:fillViewport="true"

关于滑动冲突的话，一般这种情况下，都是按照ScrollView 去滑动即可。
设置代码

recyclerView.setNestedScrollingEnabled(false);

在代码中设置代码
ScrollView sv_container;
sv_container.smoothScrollTo(0,0);
即可解决。