Android仿饿了么订单播报（TTS）的实现

前言:最近公司要开发一款新项目，其中用到了语音播报，首先想到的是讯飞，但是公司又舍不得花钱，这踏马不是很操蛋吗？百度了很多最终发现了我需要的不花钱的Android播报，可以对指定文本内容进行朗读，从而发生声音；还允许把文本对应的音频录制成音频文件，方便以后播放。Android的自动朗读主要通过TextToSpeech来完成，构造器如：TextToSpeech(Context context, TextToSpeech.OnInitListennet listener);当创建TextToSpeech对象时，必须先提供一个OnInitListener监听器——负责监听TextToSpeech的初始化结果。

使用权限

 <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
 <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>

1.接口类

public interface TTS {

    void getVoice(String voice);

}

2.实现类

/**
 * 系统播报类,部分手机不支持中文播报
 */
@SuppressLint("NewApi")
public class SystemTTS extends UtteranceProgressListener implements TTS, TextToSpeech.OnUtteranceCompletedListener {
    private Context mContext;
    private static SystemTTS singleton;
    private TextToSpeech textToSpeech; // 系统语音播报类
    private boolean isSuccess = true;

    public static SystemTTS getInstance(Context context) {
        if (singleton == null) {
            synchronized (SystemTTS.class) {
                if (singleton == null) {
                    singleton = new SystemTTS(context);
                }
            }
        }
        return singleton;
    }

    private SystemTTS(Context context) {
        this.mContext = context.getApplicationContext();
        textToSpeech = new TextToSpeech(mContext, new TextToSpeech.OnInitListener() {
            @Override
            public void onInit(int i) {
                //系统语音初始化成功
                if (i == TextToSpeech.SUCCESS) {
                    int result = textToSpeech.setLanguage(Locale.CHINA);
                    textToSpeech.setPitch(1.0f);// 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.setSpeechRate(1.0f);
                    textToSpeech.setOnUtteranceProgressListener(SystemTTS.this);
                    textToSpeech.setOnUtteranceCompletedListener(SystemTTS.this);
                    if (result == TextToSpeech.LANG_MISSING_DATA
                            || result == TextToSpeech.LANG_NOT_SUPPORTED) {
                        //系统不支持中文播报
                        isSuccess = false;
                    }
                }

            }
        });
    }

    public void getVoice(String voice) {
        if (!isSuccess) {
            return;
        }
        if (textToSpeech != null) {
            textToSpeech.speak(voice, TextToSpeech.QUEUE_ADD, null, null);
        }
    }

    public void stopSpeak() {
        if (textToSpeech != null) {
            textToSpeech.stop();
        }
    }


    //播报完成回调
    @Override
    public void onUtteranceCompleted(String utteranceId) {
    }

    @Override
    public void onStart(String utteranceId) {

    }

    @Override
    public void onDone(String utteranceId) {
    }

    @Override
    public void onError(String utteranceId) {

    }
}

3.调用

 SystemTTS systemTTS = SystemTTS.getInstance(getApplicationContext());
  systemTTS.getVoice("Hello voice");