最近由于项目需求，有个ScrollView与RecycleView的嵌套问题，当然首选是能不嵌套就不嵌套，考虑的是多条目布局，但是由于里面的item的随机的可以动态add或者remove，这就很是烦人，于是考虑嵌套，对变化的recycleview进行嵌套，对于以前的ScrollView与listview嵌套的习惯，首先就是想到的重写recycleview。。。。百度下，得知重写manager即可，下面记录下方法
public class FullyLinearLayoutManager extends LinearLayoutManager {
private static final String TAG = FullyLinearLayoutManager.class.getSimpleName();
public FullyLinearLayoutManager(Context context) {
super(context);
}
public FullyLinearLayoutManager(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++) {
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);//fix 动态添加时报IndexOutOfBoundsException
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 {
}
}
}
在manager重写后发现个问题，scrollView互动不流畅，于是又百度知。。还得重写ScrollView。。。见如下链接
http://blog.csdn.net/xuwei1213/article/details/53994679
，觉得太麻烦了，而且也达不到想要的效果，下面给出最终解决办法。。。蛮简单，在RecyclerView外面加了一层RelativeLayout，问题解决。如果你在API 23 & 24上也遇到这个问题，可以参考一下。
<android.support.v4.widget.NestedScrollView
android:layout_width="match_parent"
android:layout_height="match_parent"
>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<com.jcodecraeer.xrecyclerview.XRecyclerView
android:id="@+id/rv_fragment_find_tips_list"
android:layout_width="match_parent"
android:layout_height="wrap_content"
/>
</RelativeLayout>
</android.support.v4.widget.NestedScrollV
。。。如此就解决了。。。。至于滑动问题，设置 mRecycleView.setNestedScrollingEnabled(false)即可
