科大讯飞语音识别工具类的封装

package com.jinkun.blindguide.service;

import java.util.HashMap;
import java.util.LinkedHashMap;

import org.json.JSONException;
import org.json.JSONObject;

import android.content.Context;
import android.os.Bundle;
import android.text.TextUtils;
import android.util.Log;

import com.iflytek.cloud.ErrorCode;
import com.iflytek.cloud.InitListener;
import com.iflytek.cloud.RecognizerListener;
import com.iflytek.cloud.RecognizerResult;
import com.iflytek.cloud.SpeechConstant;
import com.iflytek.cloud.SpeechError;
import com.iflytek.cloud.SpeechRecognizer;
import com.iflytek.cloud.SpeechUtility;
import com.jinkun.blindguide.utils.ApkInstaller;
import com.jinkun.blindguide.utils.FucUtil;
import com.jinkun.blindguide.utils.JsonParser;

/**
 * 语音识别服务类
 * 
 * @author mzzdxt
 *
 */
public class SpeechRecognizeService {
	private static final String TAG = "SpeechRecognizeService";
	
	public interface Config{
		String IFLYTEK_APPID = "需要自己去开发者平台申请";
		
		String VAD_BOS_VALUE = "4000";
		String VAD_EOS_VALUE = "1000";
		String ASR_PTT_VALUE = "0";
	}
	
	public static final int ENGINE_ONLINE = 0;
	public static final int ENGINE_OFFLINE = 1;
	public static final int ENGINE_MIX = 2;

	private Context mContext;
	private int mEngineType = ENGINE_ONLINE;
	// 语音听写对象
	private SpeechRecognizer mRecognizer;
	private SpeechServiceListener mListener;
	// 用HashMap存储听写结果
	private HashMap<String, String> mIatResults = new LinkedHashMap<String, String>();
	// 语记安装助手类
	private ApkInstaller mInstaller;

	public void setSpeechServiceListener(SpeechServiceListener listener) {
		this.mListener = listener;
	}

	public SpeechRecognizeService(Context context,int engineType){
		mContext = context;
		mEngineType = engineType;
		
		// 根据语音识别类型,初始化对应参数
		initParams();
	}

	/**
	 * 初始化语音识别参数
	 */
	private void initParams() {
		SpeechUtility.createUtility(mContext, SpeechConstant.APPID + "=" + Config.IFLYTEK_APPID);
		
		mRecognizer = SpeechRecognizer.createRecognizer(mContext, mInitListener);
		
		String strEngineType = "";
		
		switch (mEngineType) {
			case ENGINE_ONLINE:
				strEngineType = SpeechConstant.TYPE_CLOUD;
				break;
			case ENGINE_OFFLINE:
				strEngineType = SpeechConstant.TYPE_LOCAL;
				break;
			case ENGINE_MIX:
				strEngineType = SpeechConstant.TYPE_MIX;
				break;
			default:
				// 默认使用混合识别模式
				strEngineType = SpeechConstant.TYPE_MIX;
				break;
		}
		
		if (mEngineType != ENGINE_ONLINE) {
			/**
			 * 选择本地听写 判断是否安装语记,未安装则跳转到提示安装页面
			 */
			if (!SpeechUtility.getUtility().checkServiceInstalled()) {
				mInstaller.install();
			} else {
				String result = FucUtil.checkLocalResource();
				if (!TextUtils.isEmpty(result) && mListener != null) {
					mListener.onLocalResourceError(result);
				}
			}
		}
		
		initCommonParams(strEngineType);
	}

	private void initCommonParams(String engineType) {
		// 清空参数
		mRecognizer.setParameter(SpeechConstant.PARAMS, null);

		// 设置听写引擎
		mRecognizer.setParameter(SpeechConstant.ENGINE_TYPE, engineType);
		
		// 设置返回结果格式
		mRecognizer.setParameter(SpeechConstant.RESULT_TYPE, "json");
		
		// 设置语言
		mRecognizer.setParameter(SpeechConstant.LANGUAGE, "zh_cn");
		
		// 设置语言区域
		mRecognizer.setParameter(SpeechConstant.ACCENT, "mandarin");

		// 设置语音前端点:静音超时时间,即用户多长时间不说话则当做超时处理
		mRecognizer.setParameter(SpeechConstant.VAD_BOS, Config.VAD_BOS_VALUE);
		
		// 设置语音后端点:后端点静音检测时间,即用户停止说话多长时间内即认为不再输入, 自动停止录音
		mRecognizer.setParameter(SpeechConstant.VAD_EOS, Config.VAD_EOS_VALUE);
		
		// 设置标点符号,设置为"0"返回结果无标点,设置为"1"返回结果有标点
		mRecognizer.setParameter(SpeechConstant.ASR_PTT, Config.ASR_PTT_VALUE);
		
		// 设置音频保存路径,保存音频格式支持pcm、wav,设置路径为sd卡请注意WRITE_EXTERNAL_STORAGE权限
		// 注:AUDIO_FORMAT参数语记需要更新版本才能生效
//		mRecognizer.setParameter(SpeechConstant.AUDIO_FORMAT, "wav");
//		mRecognizer.setParameter(SpeechConstant.ASR_AUDIO_PATH, Environment.getExternalStorageDirectory()+"/msc/iat.wav");		
	}
	
	/**
	 * 初始化监听器。
	 */
	private InitListener mInitListener = new InitListener() {

		@Override
		public void onInit(int code) {
			Log.d(TAG, "SpeechRecognizer init() code = " + code);
			if (code != ErrorCode.SUCCESS) {
				if (mListener != null) {
					mListener.onInitError("初始化失败,错误码:" + code);
				}
			}
		}
	};
	
	/**
	 * 开始监听用户讲话
	 */
	public void startListening(){
		if (mRecognizer != null && mRecognizerListener != null) {
			// 开始监听之前,需要清除map中的历史数据
			mIatResults.clear();
			
			mRecognizer.startListening(mRecognizerListener);
		} else {
			if (mListener != null) {
				mListener.onInitError("语音听写对象或监听器初始化失败");
			}
		}
	}
	
	/**
	 * 听写监听器。
	 */
	private RecognizerListener mRecognizerListener = new RecognizerListener() {

		@Override
		public void onBeginOfSpeech() {
			// 此回调表示:sdk内部录音机已经准备好了,用户可以开始语音输入
			if (mListener != null) {
				mListener.onRecognizerPrepared();
			}
		}

		@Override
		public void onError(SpeechError error) {
			// 错误码:10118(您没有说话),可能是录音机权限被禁,需要提示用户打开应用的录音权限。
			// 如果使用本地功能(语记)需要提示用户开启语记的录音权限。
			if (mListener != null) {
				mListener.onRecognizerError(error.getPlainDescription(true));
			}
		}

		@Override
		public void onEndOfSpeech() {
			// 此回调表示:检测到了语音的尾端点,已经进入识别过程,不再接受语音输入
			if (mListener != null) {
				mListener.onSpeechFinished();
			}
		}

		@Override
		public void onResult(RecognizerResult results, boolean isLast) {
			Log.d(TAG, results.getResultString());
			String printResult = printResult(results);
			
			if (mListener != null) {
				mListener.onGetRecognizerResult(printResult);
			}
			
			if (isLast) {
				if (mListener != null) {
					mListener.onGetRecognizerResultEnd();
				}
			}
		}

		@Override
		public void onVolumeChanged(int volume, byte[] data) {
			Log.d(TAG, "返回音频数据:"+data.length);
			
			if (mListener != null) {
				mListener.onVolumeChanged(volume);
			}
		}

		@Override
		public void onEvent(int eventType, int arg1, int arg2, Bundle obj) {
			
		}
	};
	
	/**
	 * 将语音识别结果转换为文字信息
	 * 
	 * @param results
	 * @return
	 */
	private String printResult(RecognizerResult results) {
		String text = JsonParser.parseIatResult(results.getResultString());

		String sn = null;
		// 读取json结果中的sn字段
		try {
			JSONObject resultJson = new JSONObject(results.getResultString());
			sn = resultJson.optString("sn");
		} catch (JSONException e) {
			e.printStackTrace();
		}

		mIatResults.put(sn, text);

		StringBuffer resultBuffer = new StringBuffer();
		for (String key : mIatResults.keySet()) {
			resultBuffer.append(mIatResults.get(key));
		}

		return resultBuffer.toString();
	}
	
	/**
	 * 结束使用后请务调用此方法来释放资源
	 */
	public void release() {
		if (mRecognizer != null) {
			mRecognizer.cancel();
			mRecognizer.destroy();
		}
	}
	
	public interface SpeechServiceListener {
		/**
		 * 初始化失败的回调
		 * 
		 * @param errorInfo 错误信息
		 */
		void onInitError(String errorInfo);
		
		void onLocalResourceError(String result);

		/**
		 * 音量发生变化时的回调
		 * 
		 * @param volume
		 */
		void onVolumeChanged(int volume);

		/**
		 * 已获取最后的结果
		 */
		void onGetRecognizerResultEnd();

		/**
		 * 获取到结果的回调
		 * 
		 * @param results
		 */
		void onGetRecognizerResult(String result);

		/**
		 * 用户讲话完毕的回调
		 */
		void onSpeechFinished();

		/**
		 * 准备完毕的回调
		 */
		void onRecognizerPrepared();
		
		/**
		 * 识别失败的回调
		 * 
		 * @param errorInfo
		 */
		void onRecognizerError(String errorInfo);
	}
}

posted @ 2017-08-11 17:51  喳喳的夏天  阅读(1643)  评论(0编辑  收藏  举报