RecyclerView的宽度不能占满父布局解决方法

直接贴代码，简单粗暴：

LinearLayoutManager layoutManager = new LinearLayoutManager(context) {
            @Override
            public RecyclerView.LayoutParams generateDefaultLayoutParams() {
                return new RecyclerView.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT,
                        ViewGroup.LayoutParams.WRAP_CONTENT);
            }
        };
mRecyclerView.setLayoutManager(layoutManager);
//        mRecyclerView.setLayoutManager(new LinearLayoutManager(context));