安卓 TextToSpeech: speak failed: not bound to TTS engine

关于语音播报一段时间没有使用系统返回 speak failed: not bound to TTS engine 错误解决办法

通过textToSpeech?.speak 返回参数判断播放是否成功如果返回-1需要重新实例化TextToSpeech。

完整代码：

SystemTTS

package com.dzw.pushlib.audio

import android.content.Context
import android.speech.tts.TextToSpeech
import android.speech.tts.UtteranceProgressListener
import android.util.Log
import java.util.*

class SystemTTS private constructor(private val context: Context) : UtteranceProgressListener(), TTS {

    // 系统语音播报类
    private var textToSpeech: TextToSpeech? = null
    private var isSuccess = false

    init {
        initSpeech()
    }

    /**
     * 初始化语音播报
     */
    private fun initSpeech(onSuccess: () -> Unit = {}) {
        textToSpeech = TextToSpeech(context) { statue: Int ->
            try {
                //系统语音初始化成功
                if (statue == TextToSpeech.SUCCESS) {
                    isSuccess = true
                    val result = textToSpeech!!.setLanguage(Locale.CHINA)
                    textToSpeech!!.setOnUtteranceProgressListener(this)
                    if (result == TextToSpeech.LANG_MISSING_DATA || result == TextToSpeech.LANG_NOT_SUPPORTED) {
                        //系统不支持中文播报
                        isSuccess = false
                        return@TextToSpeech
                    }
                    onSuccess()
                } else {
                    isSuccess = false
                }
            } catch (e: Exception) {
                e.printStackTrace()
            }
        }
    }

    override fun playText(playText: String) {
        // 设置音调，值越大声音越尖（女生），值越小则变成男声,1.0是常规
        textToSpeech?.setPitch(1.0f)
        textToSpeech?.setSpeechRate(1.0f)
        val status = textToSpeech?.speak(playText, TextToSpeech.QUEUE_ADD, null, null)
        Log.e("wade", "$status")
        if (status == TextToSpeech.ERROR) {
            initSpeech {
                // 设置音调，值越大声音越尖（女生），值越小则变成男声,1.0是常规
                playText(playText)
            }
        }
    }

    override fun stopSpeak() {
        if (textToSpeech != null) {
            textToSpeech?.stop()
        }
    }

    override fun onStart(utteranceId: String) {}
    override fun onDone(utteranceId: String) {}
    override fun onError(utteranceId: String) {}



    companion object {
        private var singleton: SystemTTS? = null

        @JvmStatic
        fun getInstance(context: Context): TTS? {
            if (singleton == null) {
                synchronized(SystemTTS::class.java) {
                    if (singleton == null) {
                        singleton = SystemTTS(context)
                    }
                }
            }
            return singleton
        }
    }
}

TTS

public interface TTS {
    void playText(String playText);

    void stopSpeak();
}

使用方法：

SystemTTS.getInstance(context).playText("测试到账");