如何计算 Kotlin Android 中的单词数? [英] how to count the number of words in Kotlin Android?

问题描述

我曾尝试阅读此线程:

这就是我在代码中使用 first() 的原因，即使它也不起作用.

解决方案

您遇到的唯一问题是您正在使用

I have tried to read this thread: Android - java - count words

but it doesn't work for me.

so let say I have these words in the android multiline edit text:

---

I

am

very very

happy

right now

---

so I want to count the number of words and then get integer '7' from that multiline edit text. how to do that ?

I have tried this, but it doesn't work:

multilineEditText.addTextChangedListener(object: TextWatcher {

            override fun afterTextChanged(s: Editable?) {

            }

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

            }

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

                val words = s.toString().trim()
                numberOfInputWords = words.split("\\s+").first().length
                wordsCounterTextView.text = "$numberOfInputWords"


            }

        })

but this code doesn't work for me, because it doesn't show the right number.

from the thread Android - java - count words

it is said that I can use someString.split("\\s+").length

but I can't access .length after using .split("\\s+"). like this

thats why I use first() in my code, even though it doesn't work either.

解决方案

The only problem you have is you are using Kotlin's split method which returns a list of String whereas Java's split method returns an array of strings. You should be accessing size property since the return of split method here is List.

  val words = s.toString().trim()
  numberOfInputWords = words.split("\\s+".toRegex()).size
  wordsCounterTextView.text = "$numberOfInputWords"

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