如何在kotlin中实现搜索视图模型并在recyclerview中显示

// SearchViewModel.kt
class SearchViewModel : ViewModel() {
    private val _searchResults = MutableLiveData<List<SearchResult>>()
    val searchResults: LiveData<List<SearchResult>> get() = _searchResults

    fun search(keyword: String) {
        // Perform search logic here, update _searchResults LiveData
    }
}

// SearchAdapter.kt
class SearchAdapter(private val searchResults: List<SearchResult>) : RecyclerView.Adapter<SearchAdapter.ViewHolder>() {
    // ViewHolder implementation

    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ViewHolder {
        // Inflate and return ViewHolder
    }

    override fun onBindViewHolder(holder: ViewHolder, position: Int) {
        // Bind data to ViewHolder
    }

    override fun getItemCount(): Int {
        return searchResults.size
    }

    inner class ViewHolder(itemView: View) : RecyclerView.ViewHolder(itemView) {
        // ViewHolder implementation
    }
}

// SearchActivity.kt
class SearchActivity : AppCompatActivity() {
    private lateinit var searchViewModel: SearchViewModel
    private lateinit var searchAdapter: SearchAdapter

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_search)

        val recyclerView: RecyclerView = findViewById(R.id.recyclerView)
        val searchEditText: EditText = findViewById(R.id.searchEditText)

        searchViewModel = ViewModelProvider(this).get(SearchViewModel::class.java)
        searchAdapter = SearchAdapter(emptyList())

        recyclerView.adapter = searchAdapter

        searchViewModel.searchResults.observe(this, Observer { searchResults ->
            searchAdapter.searchResults = searchResults
            searchAdapter.notifyDataSetChanged()
        })

        searchEditText.addTextChangedListener(object : TextWatcher {
            override fun afterTextChanged(s: Editable?) {
                // Trigger search when text changes
                searchViewModel.search(s.toString())
            }

            override fun beforeTextChanged(s: CharSequence?, start: Int, count: Int, after: Int) {}

            override fun onTextChanged(s: CharSequence?, start: Int, before: Int, count: Int) {}
        })
    }
}