如何通过 ID 打开特定 activity

Question

我有一个匹配的项目。在项目中，我使用了房间数据库。我的数据库中有三个记录，它们有一个 ID 并包含字段 imgTeamOne、imgTeamTwo、titleTeamOne、titleTeamTwo、itemDate。我为每个匹配项（ActivityDetailOne、ActivityDetailTwo、ActivityDetailThree）准备了特定的 activity，我希望当我点击第一张卡片时 - ActivityDetailOne 打开，当我点击第二张卡片时 - ActivityDetailTwo 打开，等等。我该怎么做呢？如何写一段代码让ID=0的卡片打开ActivityDetailOne，求助。我是初学者，看不懂

FragmentMatch.kt

class FragmentMatch : Fragment() {

    private lateinit var _binding: FragmentMatchBinding
    private val binding get() = _binding

    private val matchViewModel: ViewModelMatch by activityViewModels()

    private lateinit var recyclerView: RecyclerView
    private var adapter: RecyclerAdapter? = RecyclerAdapter(emptyList())

    override fun onCreateView(
        inflater: LayoutInflater, container: ViewGroup?,
        savedInstanceState: Bundle?
    ): View {
        _binding = FragmentMatchBinding.inflate(inflater, container, false)
        recyclerView = binding.passRecyclerView
        recyclerView.layoutManager =
            LinearLayoutManager(activity, LinearLayoutManager.VERTICAL, false)
        recyclerView.adapter = adapter

        requireActivity().title = "Игры"
        return binding.root
    }

    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
        super.onViewCreated(view, savedInstanceState)
        matchViewModel.matchListLiveData.observe(
            viewLifecycleOwner,
            Observer { receipts -> receipts?.let { updateUI(receipts) } }
        )
    }

    private fun updateUI(matches: List<MatchModel>) {
        if (matches.isEmpty()){
            initialDb()
        }
        adapter = RecyclerAdapter(matches)
        recyclerView.adapter = adapter
    }

    private fun initialDb(){
        val match = MatchModel(UUID.randomUUID(), "25 сентября 2021", "Chelsea", "Manchester City")
        val match2 = MatchModel(UUID.randomUUID(), "25 сентября 2021", "Everton", "Norvich City")
        val match3 = MatchModel(UUID.randomUUID(), "25 сентября 2021", "Brentford", "Liverpool")
        matchViewModel.addMatch(match)
        matchViewModel.addMatch(match2)
        matchViewModel.addMatch(match3)
    }


    private inner class MyViewHolder(itemView: View) : RecyclerView.ViewHolder(itemView),
        View.OnClickListener {

        private lateinit var match: MatchModel

        private val titleTeamOne: TextView = itemView.findViewById(R.id.titleTeamOne)
        private val imgTeamOne: ImageView = itemView.findViewById(R.id.imgTeamOne)
        private val titleTeamTwo: TextView = itemView.findViewById(R.id.titleTeamTwo)
        private val imgTeamTwo: ImageView = itemView.findViewById(R.id.imgTeamTwo)
        private val dateGame: TextView = itemView.findViewById(R.id.dateGame)
        private val favBtn: Button = itemView.findViewById(R.id.favBtn)
        private val btnDetail: Button = itemView.findViewById(R.id.btnDetail)


        init {
            itemView.setOnClickListener(this)
        }

        fun bind(match: MatchModel) {
            this.match = match
            titleTeamOne.text = (match.firstCommand)
            titleTeamTwo.text = (match.secondCommand)
            dateGame.text = (match.date)
            when (match.firstCommand) {
                "Everton" -> {
                    imgTeamOne.setImageResource(R.drawable.image_3)
                }
                "Brentford" -> {
                    imgTeamOne.setImageResource(R.drawable.image_4)
                }
                "Norwich" -> {
                    imgTeamOne.setImageResource(R.drawable.image_5)
                }
                "Liverpool" -> {
                    imgTeamOne.setImageResource(R.drawable.image_6)
                }
            }
            when (match.secondCommand) {
                "Everton" -> {
                    imgTeamTwo.setImageResource(R.drawable.image_3)
                }
                "Brentford" -> {
                    imgTeamTwo.setImageResource(R.drawable.image_4)
                }
                "Norwich" -> {
                    imgTeamTwo.setImageResource(R.drawable.image_5)
                }
                "Liverpool" -> {
                    imgTeamTwo.setImageResource(R.drawable.image_6)
                }
            }

            favBtn.setOnClickListener {
                val match = MatchModel(match.id, match.date, match.firstCommand, match.secondCommand, true)
                matchViewModel.saveMatch(match)
            }
            btnDetail.setOnClickListener {
                val intent = Intent(context, DetailActivity::class.java)
                startActivity(intent)
            }
        }

        override fun onClick(v: View) {
        }
    }

    private inner class RecyclerAdapter(private var matches: List<MatchModel>) :
        RecyclerView.Adapter<MyViewHolder>() {
        override fun onCreateViewHolder(
            parent: ViewGroup,
            viewType: Int
        ): MyViewHolder {
            val itemView =
                LayoutInflater.from(parent.context)
                    .inflate(R.layout.item_match, parent, false)
            return MyViewHolder(itemView)
        }

        override fun onBindViewHolder(holder: MyViewHolder, position: Int) {
            val match = matches[position]
            holder.bind(match)
        }

        override fun getItemCount() = matches.size
    }
}

Answer 1

我会在房间数据库中打开一个新字段，例如“val type: Int”并检查类型以打开新的 activity。但在我看来，您只能创建一个 activity 并使其对每个匹配项通用

Answer 2

因为我最初不想在数据库中创建一个单独的字段，所以我在 ID 字段中使用了 UUID.randomUUID() - 这使我的工作变得复杂，所以我编写了检查命令名称的代码并使用此命令打开 activity。这不太正确，但如果您在代码中使用不具有随机性的 ID，则可以按 ID 进行检查。这是我做的解决方案：

 btnDetail.setOnClickListener {
                if (match.firstCommand == "Chelsea") {
                    val intent = Intent(context, DetailActivity::class.java)
                    startActivity(intent)
                }else if (match.firstCommand == "Everton"){
                    val intent = Intent(context, SecondDetailActivity::class.java)
                    startActivity(intent)
                }else if(match.firstCommand== "Brentford"){
                    val intent = Intent(context, ThirdDetailActivity::class.java)
                    startActivity(intent)
                }

如何通过 ID 打开特定 activity

How to open specific activity via ID

java

android

kotlin

android-room