android 语音提醒，文字转语音播放 - 好文

android本身具有文字转语音播放的TTS,一些第三方的sdk，像百度语音，科大讯飞语音等等都提供了文字转语音播放的功能，但这些第三方sdk大都收费，还挺贵的。
这里推荐两种方法：1、android自带的TTS,适合播放量比较大的文本。部分手机不支持中文播放。声音比较难听
2、MediaPlayer播放语音，就类似支付宝语音到账的提醒等，不适合播放大量的文本，声音可以定制，可以由声优的录音播放。

下面介绍一下两种播放的代码。代码地址 <https://github.com/oldbirdy/VoiceDemo>

第一种播放方式 TTS
public class MyTTS extends UtteranceProgressListener { private TextToSpeech
tts; private boolean isSupportCN = true; private static MyTTS instance; public
static MyTTS getInstance(Context context){ if(instance == null){
synchronized(MyTTS.class){ instance = new
MyTTS(context.getApplicationContext()); } } return instance; } private
MyTTS(final Context context){ tts = new TextToSpeech(context , new
TextToSpeech.OnInitListener() { @Override public void onInit(int status) {
if(status==TextToSpeech.SUCCESS){ int result = tts.setLanguage(Locale.CHINA);
tts.setPitch(1.0f); tts.setSpeechRate(1.0f);
tts.setOnUtteranceProgressListener(MyTTS.this); if(result ==
TextToSpeech.LANG_NOT_SUPPORTED || result ==TextToSpeech.LANG_MISSING_DATA){
isSupportCN = false;
Toast.makeText(context,"抱歉，不支持中文播放",Toast.LENGTH_SHORT).show(); } } } }); }
@Override public void onStart(String utteranceId) {
Log.d("xulc","onStart---utteranceId--->"+utteranceId); } @Override public void
onDone(String utteranceId) {
Log.d("xulc","onDone---utteranceId--->"+utteranceId); } @Override public void
onError(String utteranceId) {
Log.d("xulc","onError---utteranceId--->"+utteranceId); } public TextToSpeech
getTts() { return tts; } public boolean isSupportCN() { return isSupportCN; } }
第二种 Mediaplayer播放的方法
public class VoicePlayer { private ConcurrentLinkedQueue<VoiceUnit>
voiceUnitList; private int index = 0; //播放的下标位置 private MediaPlayer
mediaPlayer; private Context mcontext; private boolean isPlaying = false;
private static VoicePlayer instance; public static VoicePlayer
getInstance(Context context){ if(instance==null){ synchronized
(VoicePlayer.class){ instance = new
VoicePlayer(context.getApplicationContext()); } } return instance; } private
VoicePlayer(Context context){ voiceUnitList = new ConcurrentLinkedQueue<>();
mcontext = context; } public void addVoiceUnit(VoiceUnit unit){
voiceUnitList.add(unit); } public void play(){ //调动播放 if(isPlaying){ //正在播放
}else{ isPlaying = true; playVoice(); } } private void playVoice(){
if(mediaPlayer==null){ mediaPlayer = new MediaPlayer(); } VoiceUnit voiceUnit =
voiceUnitList.peek(); if(voiceUnit!=null) { //内容不为空，播放当前信息 if (index <
voiceUnit.getVoices().length) { //当前信息未播放完成。播放下一条 final Uri uri =
Uri.parse("android.resource://"+mcontext.getApplicationContext().getPackageName()+"/"
+voiceUnitList.peek().getVoices()[index]); try {
mediaPlayer.setDataSource(mcontext, uri); mediaPlayer.prepare();
mediaPlayer.start(); mediaPlayer.setOnCompletionListener(new
MediaPlayer.OnCompletionListener() { @Override public void
onCompletion(MediaPlayer mp) { Log.d("xulc", "播放了一个音频(index = ):"+index+"
"+uri.getPath()); mediaPlayer.reset(); index++; playVoice(); } }); } catch
(IOException e) { e.printStackTrace(); } }else{ //播放下一项
Log.d("xulvcheng","播放下一项...."); handler.postDelayed(new Runnable() { @Override
public void run() { voiceUnitList.poll(); index = 0; playVoice(); } },2000);
//确定是否会造成内存泄漏 //200ms 读取下一条 } }else{ isPlaying = false; //播放完成 index = 0;
Log.d("xulvcheng","播放完成的状态...."); } } private Handler handler = new
MyHnadler(); private static class MyHnadler extends Handler {} public void
destory(){ if (mediaPlayer != null) { mediaPlayer.stop();
mediaPlayer.release(); mediaPlayer = null; } if(handler!=null){
handler.removeCallbacksAndMessages(null); } } }

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