FaceScenic/app/src/main/java/com/hanghui/senic/common/MTTSManager.java

package com.hanghui.senic.common;

import android.content.Context;
import android.speech.tts.TextToSpeech;
import android.text.TextUtils;

import com.blankj.utilcode.util.LogUtils;
import com.google.gson.Gson;
import com.hanghui.senic.MyAppliction;
import com.hanghui.senic.service.usbserialdemo.utile.MTTSDemo;
import com.hanghui.senic.service.usbserialdemo.utile.StringIsNull;
import com.hanghui.senic.service.usbserialdemo.utile.loacat.AppLogUtils;

import java.lang.reflect.Field;
import java.util.Locale;

/**
 * 语音播报
 */
public class MTTSManager implements TextToSpeech.OnInitListener {

    private static MTTSManager instance;
    private TextToSpeech mTTS;
    private String speakContent = "";

    public MTTSManager() {
        if (mTTS == null) {
            //监听器就直接传入本类
            mTTS = new TextToSpeech(MyAppliction.getContext(), this);
        }
    }

    public static synchronized MTTSManager getInstance() {
        if (instance == null) {
            instance = new MTTSManager();
        }
        return instance;
    }

    public void speak(String text) {
        if (StringIsNull.IsStringNull(text)) {
            AppLogUtils.e(true, "TTS语音播报", "语音内容为空 ");
            return;
        }
        AppLogUtils.e(false, "TTS语音播报", "TTS语音播报内容 ： " + text);
        if (ismServiceConnectionUsable(mTTS)) {
            if (mTTS == null) {
                mTTS = new TextToSpeech(MyAppliction.getContext(), this);
            }
            speakContent = text;
            //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
            mTTS.setPitch(1.0f);
            //设置语速
            mTTS.setSpeechRate(1.0f);
            //TextToSpeech.QUEUE_ADD添加到队列后面,依次将前面的读完轮序
            //TextToSpeech.QUEUE_FLUSH刷新队列,将之前的队列取消阅读现在的文字
            mTTS.speak(text, TextToSpeech.QUEUE_FLUSH, null);
        } else {//被回收了不可用状态
            if (mTTS != null){
                mTTS.stop();
                mTTS.shutdown();
            }
            mTTS = new TextToSpeech(MyAppliction.getContext(), status -> {
                if (status == TextToSpeech.SUCCESS) {
                    int result = mTTS.setLanguage(Locale.CHINA);
                    if (result != TextToSpeech.LANG_COUNTRY_AVAILABLE
                            && result != TextToSpeech.LANG_AVAILABLE) {
                        AppLogUtils.e(true, " TTS - onInit", "TTS语音播报 onInit: 不支持这种语言");
                    }
                    //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
                    mTTS.setPitch(1.0f);
                    //设置语速
                    mTTS.setSpeechRate(1.0f);
                    mTTS.speak(text, TextToSpeech.QUEUE_FLUSH, null);
                } else {
                    AppLogUtils.e(true, " TTS - onInit", "TTS语音播报 onInit: TTS初始化失败");
                }
            }, "com.iflytek.speechcloud");//科大讯飞语音引擎
        }
    }

    public void init() {
        //监听器就直接传入本类
        mTTS = new TextToSpeech(MyAppliction.getContext(), this);
    }

    public void destroy() {
        if (mTTS != null) {
            mTTS.stop();
            mTTS.shutdown();
            mTTS = null;
        }
        instance = null;
    }


    @Override
    public void onInit(int status) {
        if (mTTS == null) {
            mTTS = new TextToSpeech(MyAppliction.getContext(), this);
        }
        //判断是否转化成功
        if (status == TextToSpeech.SUCCESS) {
            //设置语言为中文
            int languageCode = mTTS.setLanguage(Locale.CHINESE);
            //判断是否支持这种语言，Android原生不支持中文，使用科大讯飞的tts引擎就可以了
            if (languageCode == TextToSpeech.LANG_NOT_SUPPORTED) {
                AppLogUtils.e(true, " TTS - onInit", "TTS语音播报 onInit: 不支持这种语言");
            } else {
                //不支持就改成英文
                mTTS.setLanguage(Locale.US);
            }
        } else {
            // 检查语音数据是否已下载
            if (mTTS.isLanguageAvailable(Locale.CHINESE) >= TextToSpeech.LANG_AVAILABLE) {
                AppLogUtils.e(false, "TTS - onInit", "-----------speakContent " + speakContent);
                speak(speakContent);
            } else {
                AppLogUtils.e(false, " TTS - onInit", "中文语音数据未完整下载。");
            }
        }
    }


    /**
     * TTS初始化之后有时会无法播放语音。
     * 从打印日志看failed: not bound to TTS engine
     * 找到源代码打印处
     * if (mServiceConnection == null) {
     * Log.w(TAG, method + " failed: not bound to TTS engine");
     * return errorResult;
     * }
     * 通过反射判断mServiceConnection是否为空
     *
     * @param tts
     * @return true 可用
     */
    public static boolean ismServiceConnectionUsable(TextToSpeech tts) {

        boolean isBindConnection = true;
        if (tts == null) {
            return false;
        }
        Field[] fields = tts.getClass().getDeclaredFields();
        for (int j = 0; j < fields.length; j++) {
            fields[j].setAccessible(true);
            if (TextUtils.equals("mConnectingServiceConnection", fields[j].getName()) && TextUtils.equals("android.speech.tts.TextToSpeech$Connection", fields[j].getType().getName())) {
                try {
                    if (fields[j].get(tts) == null) {
                        isBindConnection = false;
                    }
                } catch (IllegalArgumentException e) {
                    e.printStackTrace();
                } catch (IllegalAccessException e) {
                    e.printStackTrace();
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        }
        return isBindConnection;
    }
}