小编Nel*_*ght的帖子

我对 Kotlin 还很陌生，最近一直在使用 Android TextToSpeech类。我以基本的方式让它工作，但现在我想尝试检测说话何时开始/停止。

据我了解，我需要使用 UtteranceProgressListener ，但我不太明白如何在 Kotlin 中进行设置。这是我进行设置的方法：

private fun setTextToSpeech() {
    textToSpeech = TextToSpeech(this@PhraseListActivity, TextToSpeech.OnInitListener { status ->
        if (status == TextToSpeech.SUCCESS) {
            val languageToSpeak = Locale(intent.getStringExtra(DESIRED_LOCALE))
            val result = textToSpeech.setLanguage(languageToSpeak)
            if (result == TextToSpeech.LANG_MISSING_DATA || result == TextToSpeech.LANG_NOT_SUPPORTED) {
                toast("This language is not supported for text-to-speech")
            } else {
                languageCanBeSpoken = true
            }
        } else
            Log.e("error", "Initilisation Failed!")
    })

    class speechListener : UtteranceProgressListener() {
        override fun onDone(utteranceId: String?) {
            toast("finished speaking")
        }

        override fun …