Activity给Fragment传值

1.钩子Bundle

val fragment = ScreenSlideFragment()
val bundle = Bundle()
bundle.putString("LOCATION","蜀山")
fragment.arguments = bundle

创建一个Fragment

override fun onCreateView(
        inflater: LayoutInflater, container: ViewGroup?,
        savedInstanceState: Bundle?
    ): View? {
        binding = FragmentScreenSlideBinding.inflate(layoutInflater)


        val location = arguments?.get("LOCATION")
        Log.i("ScreenSlideFragment","location = " + location)
        binding.location.text = location as CharSequence?

        // Inflate the layout for this fragment
        return binding.root
    }

2.在Fragment里覆盖这个方法，从宿主Context里直接调用

 override fun onAttach(context: Context) {
        super.onAttach(context)
        val location = (context as MainActivity).getLocation()

        binding = FragmentScreenSlideBinding.inflate(layoutInflater)
        binding.location.text = location
    }