Android 6.0 解决recyclerview 在 scrollview 中不能全部显示，高度不正常的问题

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recycleview和scrollive的配合使用，在6.0以下正常使用。在6.0上高度显示不全了。
查了好久的资料，用过以下的方法都没用。遇到这问题的你，可尝试以下方法解决。

重写GridLayoutManager

public class FullyGridLayoutManager extends GridLayoutManager { public FullyGridLayoutManager(Context context, int spanCount) {     super(context, spanCount); } public FullyGridLayoutManager(Context context, int spanCount, int orientation, boolean reverseLayout) {     super(context, spanCount, 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;     int count = getItemCount();     int span = getSpanCount();     for (int i = 0; i < count; i++) {         measureScrapChild(recycler, i,                 View.MeasureSpec.makeMeasureSpec(i, View.MeasureSpec.UNSPECIFIED),                 View.MeasureSpec.makeMeasureSpec(i, View.MeasureSpec.UNSPECIFIED),                 mMeasuredDimension);         if (getOrientation() == HORIZONTAL) {             if (i % span == 0) {                 width = width + mMeasuredDimension[0];             }             if (i == 0) {                 height = mMeasuredDimension[1];             }         } else {             if (i % span == 0) {                 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) {     if (position < getItemCount()) {         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();         }     } }}

重写recycleview的onMeasure方法

     @Override    public void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {        int expandSpec = View.MeasureSpec.makeMeasureSpec(Integer.MAX_VALUE >> 2, View.MeasureSpec.AT_MOST);        super.onMeasure(widthMeasureSpec, expandSpec);        ViewGroup.LayoutParams params = getLayoutParams();        params.height = getMeasuredHeight();        setNestedScrollingEnabled(false);    }

前面两种我都试了没用。最后一种是直接在recycleview加一层相对布局就可以了。反正我的问题解决了。

  <RelativeLayout                android:layout_width="match_parent"                android:layout_height="wrap_content"                android:descendantFocusability="blocksDescendants">                <android.support.v7.widget.RecyclerView                    android:id="@+id/menuRv"                    android:layout_width="match_parent"                    android:layout_height="wrap_content"                    android:layout_marginLeft="@dimen/margin_16"                    android:layout_marginRight="@dimen/margin_16">                </android.support.v7.widget.RecyclerView>                </RelativeLayout>

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