我正在学习 Kotlin android 基础课程，我期待在一行简单的代码中进行成员声明，我不知道该怎么做

Question

您好，我是 kotlin 的新手，我正在开发单词词典应用程序，我不小心删除了一行代码，但设法将其放回原处，但由于某种原因现在无法正常工作。错误是期待成员声明。我猜它链接到期望顶级声明的代码的第 118 行，它只是一个大括号。请帮忙

/**
 * Adapter for the [RecyclerView] in [DetailActivity].
 */
class WordAdapter(private val letterId: String, context: Context) :
    RecyclerView.Adapter<WordAdapter.WordViewHolder>() {

    private val filteredWords: List<String>

    init {
        // Retrieve the list of words from res/values/arrays.xml
        val words = context.resources.getStringArray(R.array.words).toList()

        filteredWords = words
            // Returns items in a collection if the conditional clause is true,
            // in this case if an item starts with the given letter,
            // ignoring UPPERCASE or lowercase.
            .filter { it.startsWith(letterId, ignoreCase = true) }
            // Returns a collection that it has shuffled in place
            .shuffled()
            // Returns the first n items as a [List]
            .take(5)
            // Returns a sorted version of that [List]
            .sorted()
    }

    class WordViewHolder(val view: View) : RecyclerView.ViewHolder(view) {
        val button = view.findViewById<Button>(R.id.button_item)
    }

    override fun getItemCount(): Int = filteredWords.size

    /**
     * Creates new views with R.layout.item_view as its template
     */
    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): WordViewHolder {
        val layout = LayoutInflater
            .from(parent.context)
            .inflate(R.layout.item_view, parent, false)

        // Setup custom accessibility delegate to set the text read
        layout.accessibilityDelegate = Accessibility

        return WordViewHolder(layout)
    }

    /**
     * Replaces the content of an existing view with new data
     */
    override fun onBindViewHolder(holder: WordViewHolder, position: Int) {
        holder.button.setOnClickListener {
            val queryUrl: Uri = **Uri.parse("${DetailActivity.SEARCH_PREFIX}${item}")<---Unresolved reference item**
            val intent = Intent(Intent.ACTION_VIEW, queryUrl)
            **context.startActivity(intent)<---Unresolved reference context**

        }


    }
        val item = filteredWords[position]<--Unresolved reference position
        // Needed to call startActivity
        val context = holder.view.context <--Unresolved reference holder

        // Set the text of the WordViewHolder
        **holder.button.text = item**  **<---This line is the error Expecting member declaration**

    }
    // Setup custom accessibility delegate to set the text read with
    // an accessibility service
    companion object Accessibility : View.AccessibilityDelegate() {
        @RequiresApi(Build.VERSION_CODES.LOLLIPOP)
        override fun onInitializeAccessibilityNodeInfo(
            host: View?,
            info: AccessibilityNodeInfo?
        ) {
            super.onInitializeAccessibilityNodeInfo(host, info)
            // With `null` as the second argument to [AccessibilityAction], the
            // accessibility service announces "double tap to activate".
            // If a custom string is provided,
            // it announces "double tap to <custom string>".
            val customString = host?.context?.getString(R.string.look_up_word)
            val customClick =
                AccessibilityNodeInfo.AccessibilityAction(
                    AccessibilityNodeInfo.ACTION_CLICK,
                    customString
                )
            info?.addAction(customClick)
        }
    }
}          <------Here is line 118 Expecting a top level declaration

Answer 1

删除 val 项目声明顶部的“}”

我正在学习 Kotlin android 基础课程，我期待在一行简单的代码中进行成员声明，​​我不知道该怎么做

I am doing the Kotlin android basics course and I'm getting expecting member declaration on a simple line of code, I have no idea what to do

android

kotlin

我正在学习 Kotlin android 基础课程，我期待在一行简单的代码中进行成员声明，我不知道该怎么做