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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