adapter 中使用viewModel

class UrlVideoListAdapter(val context: FragmentActivity, private val dataList: List<UrlVideoData>) :
    BaseAdapter() {
    private val viewModel: BrowserViewModel =
        ViewModelProvider(context)[BrowserViewModel::class.java]
    private var roundOptions: RequestOptions? = null
    init {
        initObserver()
        viewModel.updateResolutionVideoInfo( dataList)
    }

    private fun initObserver() {
        viewModel.dataLiveData.observe(context) {
            if (true == it) {
                notifyDataSetChanged()
            }
        }
    }