最近在做Android语音播报功能（TTS），现总结如下：（ps:demo代码地址：https://github.com/giserlong/TTS_DEMO）
一.Android原生接口
用Android原生接口TextToSpeech，简单易用，但是一般情况下不支持中文，需自己下载讯飞语音+ 等中文引擎，并设置为系统默认tts，方可正常播报中文，关键代码如下：
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_native);
//初始化TTS
tts = new TextToSpeech(this, this);
//获取控件
speechText = (EditText)findViewById(R.id.speechTextView);
speechButton = (Button)findViewById(R.id.speechButton);
//为button添加监听
speechButton.setOnClickListener(new OnClickListener(){
@Override
public void onClick(View v){
// TODO Auto-generated method stub
tts.speak(speechText.getText().toString(), TextToSpeech.QUEUE_FLUSH, null);
}
});
}
@Override
public void onInit(int status){
// 判断是否转化成功
if (status == TextToSpeech.SUCCESS){
//tts.getCurrentEngine();
//默认设定语言为中文，原生的android貌似不支持中文。
int result = tts.setLanguage(Locale.CHINA);
if (result == TextToSpeech.LANG_MISSING_DATA || result == TextToSpeech.LANG_NOT_SUPPORTED){
tts.setLanguage(Locale.US);
Toast.makeText(this,"不支持中文，已自动设置为英文",Toast.LENGTH_SHORT).show();
Log.d("ss","");
}else{
Toast.makeText(this,"已自动设置为中文",Toast.LENGTH_SHORT).show();
Log.d("ss","");
}
}
}
二.百度离在线融合SDK
注册百度智能云开发者账号后，添加语音合成应用，填写包名等相关信息后，生成key及APPID等信息：
激活SDK需此关键信息，还需下载对应SDK，并添加至项目中，引用相关jar包，添加对应so库至asset
关键代码如下：
package com.yupont.www.myapplication;
import android.content.Context;
import android.os.Environment;
import com.baidu.tts.client.SpeechSynthesizer;
import com.baidu.tts.client.SpeechSynthesizerListener;
import com.baidu.tts.client.TtsMode;
import java.io.File;
import java.io.FileOutputStream;
import java.io.InputStream;
/**
* <p>文件描述：<p>
* <p>作者：Mark<p>
* <p>创建时间：2019/5/23<p>
* <p>更改时间：2019/5/23<p>
* <p>版本号：1<p>
*/
public class BaiDuSpeechUtil {
private final String TAG = this.getClass().getSimpleName();
private SpeechSynthesizer mSpeechSynthesizer;
private String mSampleDirPath;
private static final String SAMPLE_DIR_NAME = "baiduTTS";
//-------以下全是在assets下的文件，使用离线时必须全部copy到手机中方可使用----start--
private static final String SPEECH_FEMALE_MODEL_NAME = "bd_etts_common_speech_f7_mand_eng_high_am-mix_v3.0.0_20170512.dat";
private static final String SPEECH_MALE_MODEL_NAME = "bd_etts_common_speech_m15_mand_eng_high_am-mix_v3.0.0_20170505.dat";
private static final String TEXT_MODEL_NAME = "bd_etts_text.dat";
private static final String ENGLISH_SPEECH_FEMALE_MODEL_NAME = "bd_etts_speech_female_en.dat";
private static final String ENGLISH_SPEECH_MALE_MODEL_NAME = "bd_etts_speech_male_en.dat";
private static final String ENGLISH_TEXT_MODEL_NAME = "bd_etts_text_en.dat";
//--------end-------------------------------------------------------------
private static BaiDuSpeechUtil baiDuSpeechUtil = null;
public static BaiDuSpeechUtil getInstance(){
if(baiDuSpeechUtil == null) {
synchronized (BaiDuSpeechUtil.class) {
if(baiDuSpeechUtil == null) {
baiDuSpeechUtil = new BaiDuSpeechUtil();
}
}
}
return baiDuSpeechUtil;
}
/**
* 初始化百度语音资源
* @param context
*/
public void setInitialEnv(Context context) {
initialEnv(context);
}
/**
* 初始化百度语音播报相关
* @param context
*/
public void setInitialTts(Context context, SpeechSynthesizerListener speechSynthesizerListener){
initialTts(context,speechSynthesizerListener);
}
private void initialEnv(Context context) {
// long start_time= System.currentTimeMillis();
if (mSampleDirPath == null) {
String sdcardPath = Environment.getExternalStorageDirectory().toString();
mSampleDirPath = sdcardPath + "/" + SAMPLE_DIR_NAME;
}
makeDir(mSampleDirPath);
copyFromAssetsToSdcard(context,false, SPEECH_FEMALE_MODEL_NAME, mSampleDirPath + "/" + SPEECH_FEMALE_MODEL_NAME);
copyFromAssetsToSdcard(context,false, SPEECH_MALE_MODEL_NAME, mSampleDirPath + "/" + SPEECH_MALE_MODEL_NAME);
copyFromAssetsToSdcard(context,false, TEXT_MODEL_NAME, mSampleDirPath + "/" + TEXT_MODEL_NAME);
copyFromAssetsToSdcard(context,false, "english/" + ENGLISH_SPEECH_FEMALE_MODEL_NAME, mSampleDirPath + "/"
+ ENGLISH_SPEECH_FEMALE_MODEL_NAME);
copyFromAssetsToSdcard(context,false, "english/" + ENGLISH_SPEECH_MALE_MODEL_NAME, mSampleDirPath + "/"
+ ENGLISH_SPEECH_MALE_MODEL_NAME);
copyFromAssetsToSdcard(context,false, "english/" + ENGLISH_TEXT_MODEL_NAME, mSampleDirPath + "/"
+ ENGLISH_TEXT_MODEL_NAME);
// Log.d(TAG,"initialEnv cost:"+ (System.currentTimeMillis()-start_time));
}
private void makeDir(String dirPath) {
File file = new File(dirPath);
if (!file.exists()) {
file.mkdirs();
}
}
/**
* 将sample工程需要的资源文件拷贝到SD卡中使用（授权文件为临时授权文件，请注册正式授权）
* 主要是在离线时候用到，只需执行一次即可，这里写的不严谨，应该去判断一下离线用的那些文件，sd卡是否存在，如果不存在，则copy，如果存在则无需在copy，可在子线程操作
* @param isCover 是否覆盖已存在的目标文件
* @param source
* @param dest
*/
private void copyFromAssetsToSdcard(Context context, boolean isCover, String source, String dest) {
File file = new File(dest);
if (isCover || (!isCover && !file.exists())) {
InputStream is = null;
FileOutputStream fos = null;
try {
is = context.getAssets().open(source);
String path = dest;
fos = new FileOutputStream(path);
byte[] buffer = new byte[1024];
int size = 0;
while ((size = is.read(buffer, 0, 1024)) != -1) {
fos.write(buffer, 0, size);
}
fos.flush();
} catch (Exception e) {
e.printStackTrace();
} finally {
if (is != null) {
try {
is.close();
} catch (Exception e) {
e.printStackTrace();
}
}
if (fos != null) {
try {
is.close();
} catch (Exception e) {
e.printStackTrace();
}
}
}
}
}
//此方法可在子线程中操作，由于这个初始化过程比较费时，大概在1s左右，看项目需求而定，如果是进入界面就必须播放（伴随UI改变的）的，在UI线程，如无其他特殊要求，放在子线程中即可
private void initialTts(Context context,SpeechSynthesizerListener speechSynthesizerListener) {
// long start_time= System.currentTimeMillis();
mSpeechSynthesizer = SpeechSynthesizer.getInstance();
mSpeechSynthesizer.setContext(context);
mSpeechSynthesizer.setSpeechSynthesizerListener(speechSynthesizerListener);
mSpeechSynthesizer.setApiKey(Config.appKey_baidu, Config.secret_baidu);
mSpeechSynthesizer.setAppId(Config.appID_baidu);
// 文本模型文件路径 (离线引擎使用)
mSpeechSynthesizer.setParam(SpeechSynthesizer.PARAM_TTS_TEXT_MODEL_FILE, mSampleDirPath + "/"
+ TEXT_MODEL_NAME);
mSpeechSynthesizer.setParam(SpeechSynthesizer.PARAM_TTS_SPEECH_MODEL_FILE, mSampleDirPath + "/"
+ SPEECH_FEMALE_MODEL_NAME);
// 本地授权文件路径,如未设置将使用默认路径.设置临时授权文件路径，LICENCE_FILE_NAME请替换成临时授权文件的实际路径，仅在使用临时license文件时需要进行设置，如果在[应用管理]中开通了正式离线授权，不需要设置该参数，建议将该行代码删除（离线引擎）
// 如果合成结果出现临时授权文件将要到期的提示，说明使用了临时授权文件，请删除临时授权即可。
// 发音人（在线引擎），可用参数为0,1,2,3。。。（服务器端会动态增加，各值含义参考文档，以文档说明为准。0--普通女声，1--普通男声，2--特别男声，3--情感男声。。。）
mSpeechSynthesizer.setParam(SpeechSynthesizer.PARAM_SPEAKER, "0");
// 设置Mix模式的合成策略, //mix模式下，wifi使用在线合成，非wifi使用离线合成)
mSpeechSynthesizer.setParam(SpeechSynthesizer.PARAM_MIX_MODE, SpeechSynthesizer.MIX_MODE_HIGH_SPEED_SYNTHESIZE_WIFI);
// if(SystemUtil.isNetWorkConnected(getCurrentActivity())) {
// // AuthInfo接口用于测试开发者是否成功申请了在线或者离线授权，如果测试授权成功了，可以删除AuthInfo部分的代码（该接口首次验证时比较耗时），不会影响正常使用（合成使用时
// AuthInfo authInfo=this.mSpeechSynthesizer.auth(TtsMode.MIX);
//
// if (authInfo.isSuccess()){
// toPrint("auth success");
// }else{
// String errorMsg=authInfo.getTtsError().getDetailMessage();
// toPrint("auth failed errorMsg=" + errorMsg);
// }
// }
// 初始化tts
mSpeechSynthesizer.initTts(TtsMode.MIX);
// 加载离线英文资源（提供离线英文合成功能）
//int result = mSpeechSynthesizer.loadEnglishModel(mSampleDirPath + "/" + ENGLISH_TEXT_MODEL_NAME, mSampleDirPath + mSampleDirPath + "/" + ENGLISH_SPEECH_FEMALE_MODEL_NAME);
// Log.d(TAG,"initialTts cost:"+ (System.currentTimeMillis()-start_time));
int result = mSpeechSynthesizer.loadModel(mSampleDirPath + "/" + TEXT_MODEL_NAME, mSampleDirPath + mSampleDirPath + "/" + SPEECH_FEMALE_MODEL_NAME);
if(result<0){
result++;
}
}
/**
* 播报的文字
* @param content
*/
public void speakText(String content) {
try{
if(mSpeechSynthesizer != null) {
int result = mSpeechSynthesizer.speak(content);
if (result < 0) {
// Log.d(TAG,"error,please look up error code in doc or URL:http://yuyin.baidu.com/docs/tts/122 ");
}
}
}catch (Exception e) {
e.printStackTrace();
}
}
/**
* 暂停
*/
public void pauseSpeechSynthesizer(){
if(mSpeechSynthesizer != null) {
mSpeechSynthesizer.pause();
}
}
/**
* 停止播放
*/
public void stopSpeechSynthesizer(){
if(mSpeechSynthesizer != null) {
mSpeechSynthesizer.stop();
}
}
/**
* 接着停止后的地方播放
*/
public void resumeSpeechSynthesizer(){
if(mSpeechSynthesizer != null) {
mSpeechSynthesizer.resume();
}
}
/**
* 释放mSpeechSynthesizer，在使用完之后必须调用，确保下个界面使用的时候资源已经释放掉了，否则下个界面将无法正常播放
*/
public void releaseSpeechSynthesizer(){
if(mSpeechSynthesizer != null) {
mSpeechSynthesizer.release();
}
}
public void setSpeechSynthesizerNull(){
if(mSpeechSynthesizer != null) {
mSpeechSynthesizer = null;
}
}
public void endSpeechSynthesizer(){
pauseSpeechSynthesizer();
stopSpeechSynthesizer();
releaseSpeechSynthesizer();
setSpeechSynthesizerNull();
}
}
首次需联网，自动下载授权文件，以后离线也能用
三.云知声离线SDK
同百度，注册账号后，下载sdk,做好引用与配置
gradle中配置：
sourceSets {
main {
jniLibs.srcDirs = [‘libs’]
}
}
关键代码：
package com.yupont.www.myapplication;
import java.io.File;
import java.io.FileOutputStream;
import java.io.InputStream;
import android.app.Activity;
import android.content.Context;
import android.os.Bundle;
import android.os.Environment;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;
import com.unisound.client.SpeechConstants;
import com.unisound.client.SpeechSynthesizer;
import com.unisound.client.SpeechSynthesizerListener;
public class yzsTTSOfflineActivity extends Activity {
private static boolean TTS_PLAY_FLAGE = false;
private EditText mTTSText;
private TextView mTextViewTip;
private TextView mTextViewStatus;
private Button mTTSPlayBtn;
private SpeechSynthesizer mTTSPlayer;
private final String mFrontendModel= Environment.getExternalStorageDirectory().toString()+"/Yupont/UAV/OfflineTTSModels/frontend_model";
private final String mBackendModel = Environment.getExternalStorageDirectory().toString()+"/Yupont/UAV/OfflineTTSModels/backend_lzl";
// private final String mFrontendModel= getClass().getClassLoader().getResource("assets/OfflineTTSModels/frontend_model").getPath().substring(5);
// private final String mBackendModel = getClass().getClassLoader().getResource("assets/OfflineTTSModels/backend_lzl").getPath();
//
@Override
public void onCreate(Bundle savedInstanceState) {
// requestWindowFeature(Window.FEATURE_CUSTOM_TITLE);
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_yzs_offline_tts);
copyFilesFassets(this,"OfflineTTSModels", Environment.getExternalStorageDirectory().toString()+"/Yupont/UAV/OfflineTTSModels");
//getWindow().setFeatureInt(Window.FEATURE_CUSTOM_TITLE, R.layout.status_bar_main);
mTTSText = (EditText) findViewById(R.id.textViewResult);
//mTextViewStatus = (TextView) findViewById(R.id.textViewStatus);
//mTextViewTip = (TextView) findViewById(R.id.textViewTip);
mTTSPlayBtn = (Button) findViewById(R.id.recognizer_btn);
mTTSPlayBtn.setEnabled(false);
mTTSPlayBtn.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View arg0) {
TTSPlay();
}
});
// 初始化本地TTS播报
initTts();
}
/**
* 从assets目录中复制整个文件夹内容
* @param context Context 使用CopyFiles类的Activity
* @param oldPath String 原文件路径 如：/aa
* @param newPath String 复制后路径 如：xx:/bb/cc
*/
public void copyFilesFassets(Context context, String oldPath, String newPath) {
try {
String fileNames[] = context.getAssets().list(oldPath);//获取assets目录下的所有文件及目录名
if (fileNames.length > 0) {//如果是目录
File file = new File(newPath);
file.mkdirs();//如果文件夹不存在，则递归
for (String fileName : fileNames) {
copyFilesFassets(context,oldPath + "/" + fileName,newPath+"/"+fileName);
}
} else {//如果是文件
if(new File(newPath).exists()){
return;
}
InputStream is = context.getAssets().open(oldPath);
FileOutputStream fos = new FileOutputStream(new File(newPath));
byte[] buffer = new byte[1024];
int byteCount=0;
while((byteCount=is.read(buffer))!=-1) {//循环从输入流读取 buffer字节
fos.write(buffer, 0, byteCount);//将读取的输入流写入到输出流
}
fos.flush();//刷新缓冲区
is.close();
fos.close();
}
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
//如果捕捉到错误则通知UI线程
//MainActivity.handler.sendEmptyMessage(COPY_FALSE);
}
}
/**
* 初始化本地离线TTS
*/
private void initTts() {
// 初始化语音合成对象
try {
mTTSPlayer = new SpeechSynthesizer(this, Config.appKey, Config.secret);
// 设置本地合成
mTTSPlayer.setOption(SpeechConstants.TTS_SERVICE_MODE, SpeechConstants.TTS_SERVICE_MODE_LOCAL);
File _FrontendModelFile = new File(mFrontendModel);
if (!_FrontendModelFile.exists()) {
toastMessage("文件：" + mFrontendModel + "不存在，请将assets下相关文件拷贝到SD卡指定目录！");
}
File _BackendModelFile = new File(mBackendModel);
if (!_BackendModelFile.exists()) {
toastMessage("文件：" + mBackendModel + "不存在，请将assets下相关文件拷贝到SD卡指定目录！");
}
// 设置前端模型
mTTSPlayer.setOption(SpeechConstants.TTS_KEY_FRONTEND_MODEL_PATH, mFrontendModel);
// 设置后端模型
mTTSPlayer.setOption(SpeechConstants.TTS_KEY_BACKEND_MODEL_PATH, mBackendModel);
// 设置回调监听
mTTSPlayer.setTTSListener(new SpeechSynthesizerListener() {
@Override
public void onEvent(int type) {
switch (type) {
case SpeechConstants.TTS_EVENT_INIT:
// 初始化成功回调
log_i("onInitFinish");
mTTSPlayBtn.setEnabled(true);
break;
case SpeechConstants.TTS_EVENT_SYNTHESIZER_START:
// 开始合成回调
log_i("beginSynthesizer");
break;
case SpeechConstants.TTS_EVENT_SYNTHESIZER_END:
// 合成结束回调
log_i("endSynthesizer");
break;
case SpeechConstants.TTS_EVENT_BUFFER_BEGIN:
// 开始缓存回调
log_i("beginBuffer");
break;
case SpeechConstants.TTS_EVENT_BUFFER_READY:
// 缓存完毕回调
log_i("bufferReady");
break;
case SpeechConstants.TTS_EVENT_PLAYING_START:
// 开始播放回调
log_i("onPlayBegin");
break;
case SpeechConstants.TTS_EVENT_PLAYING_END:
// 播放完成回调
log_i("onPlayEnd");
setTTSButtonReady();
break;
case SpeechConstants.TTS_EVENT_PAUSE:
// 暂停回调
log_i("pause");
break;
case SpeechConstants.TTS_EVENT_RESUME:
// 恢复回调
log_i("resume");
break;
case SpeechConstants.TTS_EVENT_STOP:
// 停止回调
log_i("stop");
break;
case SpeechConstants.TTS_EVENT_RELEASE:
// 释放资源回调
log_i("release");
break;
default:
break;
}
}
@Override
public void onError(int type, String errorMSG) {
// 语音合成错误回调
log_i("onError");
toastMessage(errorMSG);
setTTSButtonReady();
}
});
// 初始化合成引擎
mTTSPlayer.init("");
} catch (Exception e) {
e.printStackTrace();
}
}
private void TTSPlay() {
if (!TTS_PLAY_FLAGE) {
mTTSPlayer.playText(mTTSText.getText().toString());
setTTSButtonStop();
} else {
mTTSPlayer.stop();
setTTSButtonReady();
}
}
private void setTTSButtonStop() {
TTS_PLAY_FLAGE = true;
mTTSPlayBtn.setText(R.string.stop_tts);
}
private void setTTSButtonReady() {
mTTSPlayBtn.setText(R.string.start_tts);
TTS_PLAY_FLAGE = false;
}
protected void setTipText(String tip) {
mTextViewTip.setText(tip);
}
protected void setStatusText(String status) {
mTextViewStatus.setText(getString(R.string.lable_status) + "(" + status + ")");
}
@Override
public void onPause() {
super.onPause();
// 主动停止识别
if (mTTSPlayer != null) {
mTTSPlayer.stop();
}
}
private void log_i(String log) {
Log.i("demo", log);
}
@Override
protected void onDestroy() {
// 主动释放离线引擎
if (mTTSPlayer != null) {
mTTSPlayer.release(SpeechConstants.TTS_RELEASE_ENGINE, null);
}
super.onDestroy();
}
private void toastMessage(String message) {
Toast.makeText(this, message, Toast.LENGTH_SHORT).show();
}
}