解决ScrollView嵌套RecycleView高度不适配问题

1. 重写LinearLayoutManager，计算item的全部高度

public class FullLinearLayout extends LinearLayoutManager {

    private int[] mMeasuredDimension = new int[2];
    int dividerHeight = 1;//分割线高度，默认为1,这里的分割线高度和fullLinearlayoutmanager的分割线高度必须一致！

    @SuppressWarnings("UnusedDeclaration")
    public FullLinearLayout(Context context, int dividerHeight) {
        super(context);
        this.dividerHeight = dividerHeight;
    }

    @SuppressWarnings("UnusedDeclaration")
    public FullLinearLayout(Context context, int orientation, boolean reverseLayout) {
        super(context, orientation, reverseLayout);
    }

    @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 heightSize = View.MeasureSpec.getSize(heightSpec);
        int width = 0;
        int height = 0;
        for (int i = 0; i < getItemCount(); i++) {
            try {
                measureScrapChild(recycler, i, widthSpec, View.MeasureSpec.makeMeasureSpec(i, View.MeasureSpec.UNSPECIFIED), mMeasuredDimension);
            } catch (IndexOutOfBoundsException e) {
                e.printStackTrace();
            }
            if (getOrientation() == HORIZONTAL) {
                width = width + mMeasuredDimension[0];
                if (i == 0) {
                    height = mMeasuredDimension[1];
                }
            } else {
                //【每个item的高度都要加上分割线高度】
                height = height + mMeasuredDimension[1] +;
                if (i == 0) {
                    width = mMeasuredDimension[0];
                }
            }
        }
        switch (widthMode) {
            case View.MeasureSpec.EXACTLY:
            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(widthSpec, height);
    }

    private void measureScrapChild(RecyclerView.Recycler recycler, int position, int widthSpec, int heightSpec, int[] measuredDimension) {
        View view = recycler.getViewForPosition(position);
        if (view != null) {
            RecyclerView.LayoutParams p = (RecyclerView.LayoutParams) view.getLayoutParams();
            int childHeightSpec = ViewGroup.getChildMeasureSpec(heightSpec, getPaddingTop() + getPaddingBottom(), p.height);
            view.measure(widthSpec, childHeightSpec);
            measuredDimension[0] = view.getMeasuredWidth() + p.leftMargin + p.rightMargin;
            measuredDimension[1] = view.getMeasuredHeight() + p.bottomMargin + p.topMargin;
            recycler.recycleView(view);
        }
    }

    @Override
    public void onLayoutChildren(RecyclerView.Recycler recycler, RecyclerView.State state) {
        super.onLayoutChildren(recycler, state);
    }
}

2.RecycleView如果设置了addItemDecoration，那么高度要和上文中的dividerHeight要一致

3. 这个时候运行会出现RecycleView自动获取了焦点，使得rv上面的布局看不到

解决办法如下

<span style="font-size:18px;"></span><pre style="font-family: Consolas; background-color: rgb(255, 255, 255);"><span style="font-weight: normal; font-size: 12.8pt; color: rgb(128, 128, 128); "><em></em></span><pre name="code" class="java" style="font-weight: normal; font-size: 12.8pt;"><span style="font-family: Consolas;font-size:18px;">new Handler().postDelayed(new Runnable() {</span>

@Override public void run() { scrollView.scrollTo(0, 0); } }, 100);

有的说会出现滚动的视觉效果，体验不好，那么这里用个小技巧就可以搞定，看源码，

ScrollView嵌套RecycleView解决高度不适配 - 下载频道 - CSDN.NET
http://download.csdn.net/detail/tan6458/9493114

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