@Overridepublic void onDraw(Canvas c, RecyclerView parent, State state) {int top = parent.getPaddingTop();int bottom = parent.getHeight() - parent.getPaddingBottom();int childCount = parent.getChildCount();for(int i=0;i < childCount;i++){View child = parent.getChildAt(i);RecyclerView.LayoutParams layoutParams = (RecyclerView.LayoutParams)child.getLayoutParams();int left = child.getRight() + layoutParams.rightMargin;int right = left + mDivider.getIntrinsicWidth();mDivider.setBounds(left, top, right, bottom);mDivider.draw(c);}}

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"xmlns:tools="http://schemas.android.com/tools"android:layout_width="match_parent"android:layout_height="match_parent"tools:context="com.xmy.recylerviewdemo.MainActivity" ><android.support.v7.widget.RecyclerViewandroid:id="@+id/recyclerView"android:layout_width="wrap_content"android:layout_height="wrap_content"/></RelativeLayout>

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"android:layout_width="wrap_content"android:layout_height="wrap_content"android:gravity="center"android:padding="10.0dip"android:orientation="vertical" ><ImageView android:id="@+id/item_iv"android:layout_width="wrap_content"android:layout_height="wrap_content"android:scaleType="center"android:src="@drawable/img"android:adjustViewBounds="true"/><TextViewandroid:id="@+id/item_tv"android:layout_width="wrap_content"android:layout_height="wrap_content"/></LinearLayout>

public void onMeasure(Recycler recycler, State state, int widthSpec,int heightSpec)

在onMeasure中可以获 得RecyclerView.Recycler。Recycler负责管理Item视图的重复利用，所以我们可以通过Recycler获取一个Item视 图的实例，然后像复写其他ViewGroup一样，使用measureChild获取子视图的高度后使用setMeasuredDimension设置 RecyclerView同样的高度即可。

public class MyLayoutManager extends LinearLayoutManager {public MyLayoutManager(Context context) {super(context);// TODO Auto-generated constructor stub
    }@Overridepublic void onMeasure(Recycler recycler, State state, int widthSpec,int heightSpec) {View view = recycler.getViewForPosition(0);if(view != null){measureChild(view, widthSpec, heightSpec);int measuredWidth = MeasureSpec.getSize(widthSpec);int measuredHeight = view.getMeasuredHeight();setMeasuredDimension(measuredWidth, measuredHeight);}}
}

修改完之后的运行效果图：

最后奉上示例程序Github链接。