视图绑定返回空

Question

在底部工作表对话框中

class XBottomSheet () : BottomSheetDialogFragment() {

    private var _binding: XBottomSheetBinding? = null
    private val binding get() = _binding!!
    private var handlerRunner: Runnable? = null
    private val handler = Handler(Looper.getMainLooper())

    override fun onCreateView(
        inflater: LayoutInflater,
        container: ViewGroup?,
        savedInstanceState: Bundle?
    ): View? {
        _binding = XBottomSheetBinding.inflate(inflater, container, false)
        return binding.root
    }

    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
        super.onViewCreated(view, savedInstanceState)

        handlerRunner = Runnable {
            binding.tvTimeOffer.text = "text"
       }
       
       handler.postDelayed(handlerRunner!!, 1)
    }


    override fun onDestroyView() {
        super.onDestroyView()
        _binding = null

        handlerRunner?.apply {
            handler.removeCallbacks(this)
        }
    }
}

在某些手机中，Firebase carashlytics会记录private val binding get() = _binding!! 非致命异常：private val binding get() = _binding!!

在某个时候，在设置_binding = null之后，处理程序可以在删除它之前调用runnable吗?？

我不知道为什么！

Answer 1

在绑定获得null之前删除处理程序回调

override fun onDestroyView() {
        super.onDestroyView()
        handler?.removeCallbacks(this)
        _binding = null
    }