android tablayout + recycleview 简单使用

//添加tab 并设置为已选中
tab_layout.addTab(tab_layout.newTab().setText("请选择"),0,true)

//跳转到selectedPos位置，并让其置顶（只要有置顶的条件）
(recycle_view.layoutManager as LinearLayoutManager).scrollToPositionWithOffset(selectedPos,0)

tab_layout.addOnTabSelectedListener(object : TabLayout.BaseOnTabSelectedListener<TabLayout.Tab> {
            override fun onTabReselected(p0: TabLayout.Tab?) {

            }

            override fun onTabUnselected(p0: TabLayout.Tab?) {

            }

            override fun onTabSelected(p0: TabLayout.Tab?) {
                //p0?.position
                //这里重新加载recycleView的数据
            }

        })