在Kotlin TextWatcher中不带按钮的2个数的乘法

<EditText
    android:id="@+id/etNumber1"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:inputType="numberDecimal"
    android:hint="请输入第一个数值" />

<EditText
    android:id="@+id/etNumber2"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:inputType="numberDecimal"
    android:hint="请输入第二个数值" />

val etNumber1 = findViewById<EditText>(R.id.etNumber1)
val etNumber2 = findViewById<EditText>(R.id.etNumber2)

etNumber1.addTextChangedListener(object : TextWatcher {
    override fun beforeTextChanged(s: CharSequence?, start: Int, count: Int, after: Int) {
        // 在文本变化前执行的操作
    }

    override fun onTextChanged(s: CharSequence?, start: Int, before: Int, count: Int) {
        // 在文本变化时执行的操作
        performMultiplication()
    }

    override fun afterTextChanged(s: Editable?) {
        // 在文本变化后执行的操作
    }
})

etNumber2.addTextChangedListener(object : TextWatcher {
    override fun beforeTextChanged(s: CharSequence?, start: Int, count: Int, after: Int) {
        // 在文本变化前执行的操作
    }

    override fun onTextChanged(s: CharSequence?, start: Int, before: Int, count: Int) {
        // 在文本变化时执行的操作
        performMultiplication()
    }

    override fun afterTextChanged(s: Editable?) {
        // 在文本变化后执行的操作
    }
})

fun performMultiplication() {
    val number1 = etNumber1.text.toString().toDoubleOrNull()
    val number2 = etNumber2.text.toString().toDoubleOrNull()

    if (number1 != null && number2 != null) {
        val result = number1 * number2
        // 将结果显示在界面上，例如通过TextView
        // textViewResult.text = result.toString()
    }
}