Android TTS（Text-to-speech）技术

Android TTS技术，也就是Text-to-speech技术。就是通过文字转化与语音的能力，而Android手机平台，也绑定了英文语音引擎，对英文语音提拱了内置的支持。通过输入一段英文，就可以将其以语音的形式播放出来。这也是该平台下的一个创意设计。

下面我们来看看这是如何实现的：

第一步：检查TTS数据是否可用：

//检查TTS数据是否已经安装并且可用 Intent checkIntent = new Intent(); checkIntent.setAction(TextToSpeech.Engine.ACTION_CHECK_TTS_DATA); startActivityForResult(checkIntent, REQ_TTS_STATUS_CHECK);protected void onActivityResult(int requestCode, int resultCode, Intent data) {if(requestCode == REQ_TTS_STATUS_CHECK){switch (resultCode) {case TextToSpeech.Engine.CHECK_VOICE_DATA_PASS://这个返回结果表明TTS Engine可以用{mTts = new TextToSpeech(this, this);Log.v(TAG, "TTS Engine is installed!");}break;case TextToSpeech.Engine.CHECK_VOICE_DATA_BAD_DATA://需要的语音数据已损坏case TextToSpeech.Engine.CHECK_VOICE_DATA_MISSING_DATA://缺少需要语言的语音数据case TextToSpeech.Engine.CHECK_VOICE_DATA_MISSING_VOLUME://缺少需要语言的发音数据{//这三种情况都表明数据有错,重新下载安装需要的数据Log.v(TAG, "Need language stuff:"+resultCode);Intent dataIntent = new Intent();dataIntent.setAction(TextToSpeech.Engine.ACTION_INSTALL_TTS_DATA);startActivity(dataIntent);}break;case TextToSpeech.Engine.CHECK_VOICE_DATA_FAIL://检查失败default:Log.v(TAG, "Got a failure. TTS apparently not available");break;}}else{//其他Intent返回的结果}}

 

 

下一步，初始化TTS。

//实现TTS初始化接口@Overridepublic void onInit(int status) {// TODO Auto-generated method stub//TTS Engine初始化完成if(status == TextToSpeech.SUCCESS){int result = mTts.setLanguage(Locale.US);//设置发音语言if(result == TextToSpeech.LANG_MISSING_DATA || result == TextToSpeech.LANG_NOT_SUPPORTED)//判断语言是否可用{Log.v(TAG, "Language is not available");speakBtn.setEnabled(false);}else{mTts.speak("This is an example of speech synthesis.", TextToSpeech.QUEUE_ADD, null);speakBtn.setEnabled(true);}}}

 

 

接下来，设置发音语言

public void onItemSelected(AdapterView<?> parent, View view,int position, long id) {// TODO Auto-generated method stubint pos = langSelect.getSelectedItemPosition();int result = -1;switch (pos) {case 0:{inputText.setText("I love you");result = mTts.setLanguage(Locale.US);}break;case 1:{inputText.setText("Je t'aime");result = mTts.setLanguage(Locale.FRENCH);}break;case 2:{inputText.setText("Ich liebe dich");result = mTts.setLanguage(Locale.GERMAN);}break;case 3:{inputText.setText("Ti amo");result = mTts.setLanguage(Locale.ITALIAN);}break;case 4:{inputText.setText("Te quiero");result = mTts.setLanguage(new Locale("spa", "ESP"));}break;default:break;}//设置发音语言if(result == TextToSpeech.LANG_MISSING_DATA || result == TextToSpeech.LANG_NOT_SUPPORTED)//判断语言是否可用{Log.v(TAG, "Language is not available");speakBtn.setEnabled(false);}else{speakBtn.setEnabled(true);}}

 

 

最近点击Button按钮发音：

public void onClick(View v) {// TODO Auto-generated method stubmTts.speak(inputText.getText().toString(), TextToSpeech.QUEUE_ADD, null);//朗读输入框里的内容}