之前在做TTS开发的时候能够正常的将文字转为语音,但是今天做了一个小程序,结果却发不了音,仔细测试了一下,发现了一个问题。
首先先讲下TTS如何实现。
1、安装语音库,假如要中文发音,科大讯飞语音3.0就很好。
2、最简单的程序如下:
package com.example.tts;
import java.util.Locale;
import android.speech.tts.TextToSpeech;
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.Toast;
public class MainActivity extends ActionBarActivity implements TextToSpeech.OnInitListener{
TextToSpeech textToSpeech = null;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
textToSpeech = new TextToSpeech(this, this);
textToSpeech.speak("此处无声", TextToSpeech.QUEUE_ADD, null);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
protected void onDestroy()
{
super.onDestroy();
if (textToSpeech!=null) {
textToSpeech.shutdown();
}
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
int id = item.getItemId();
if (id == R.id.action_settings) {
textToSpeech.speak("此处有声", TextToSpeech.QUEUE_FLUSH, null);
return true;
}
return super.onOptionsItemSelected(item);
}
@Override
public void onInit(int status) {
// TODO Auto-generated method stub
if (status == TextToSpeech.SUCCESS) {
int result = textToSpeech.setLanguage(Locale.CHINESE);
if (result == TextToSpeech.LANG_MISSING_DATA
|| result == TextToSpeech.LANG_NOT_SUPPORTED
|| result == TextToSpeech.ERROR) {
Toast.makeText(this, "数据丢失或语言不支持", Toast.LENGTH_SHORT).show();
}
if (result == TextToSpeech.LANG_AVAILABLE) {
Toast.makeText(this, "支持该语言", Toast.LENGTH_SHORT).show();
}
Toast.makeText(this, "初始化成功", Toast.LENGTH_SHORT).show();
}
}
}
无需任何权限,这里有个问题,就是在动态创建一个对象之后,在onCreate里面调用speak方法,并不能发出声音。
可以把文字保存为语音文件,也可以读取语音文件
public void saveToFile(TextToSpeech speech,String text,String file)
{
String destFileName = "/sdcard/tts/"+file+".wav";
speech.synthesizeToFile(text, null, destFileName);
}
public void readFromFile(TextToSpeech speech,String file)
{
String destFileName = "/sdcard/tts/"+file+".wav";
speech.addSpeech("2", destFileName);
speech.speak("2", TextToSpeech.QUEUE_ADD, null);
}
接下来讲一下如何实现语音识别
语音识别首先可以考虑使用科大讯飞,但是目前使用必须要联网,而且申请一个APPID。
用起来不难
1、语音合成功能
private SpeechSynthesizer speechSynthesizer;
SpeechUser.getUser().login(MainActivity.this, null, null, "appid=54d304cf", null);
speechSynthesizer = SpeechSynthesizer.createSynthesizer(this);
speechSynthesizer.setParameter(SpeechConstant.VOICE_NAME, "xiaoyan");
speechSynthesizer.setParameter(SpeechConstant.SPEED, "50");
speechSynthesizer.setParameter(SpeechConstant.VOLUME, "50");
speechSynthesizer.setParameter(SpeechConstant.PITCH, "50");
String text = editText.getText().toString();
speechSynthesizer.startSpeaking(text, null);
注册--设置--播放。文字转语音功能需要联网,但不需要正确的APPID,可以直接使用。但是语音识别就需要联网和正确的APPID
2、语音识别
private RecognizerDialog recognizerDialog;
SpeechUser.getUser().login(MainActivity.this, null, null, "appid=54d304cf", null);
recognizerDialog = new RecognizerDialog(this);
recognizerDialog.setParameter(SpeechConstant.DOMAIN, "iat");
recognizerDialog.setParameter(SpeechConstant.SAMPLE_RATE, "16000");
//显示Dialog
recognizerDialog.setListener(dialogListener);
recognizerDialog.show();
private RecognizerDialogListener dialogListener = new RecognizerDialogListener() {
//识别结果回调
@Override
public void onResult(RecognizerResult arg0, boolean arg1) {
// TODO Auto-generated method stub
String text = JsonParser.parseIatResult(arg0.getResultString());
editText.append(text);
editText.setSelection(editText.length());
}
//识别结束回调
@Override
public void onError(SpeechError arg0) {
// TODO Auto-generated method stub
}
};
package com.example.viocedemo;
import org.json.JSONArray;
import org.json.JSONObject;
import org.json.JSONTokener;
import android.text.TextUtils;
/**
* 对云端返回的Json结果进行解析
* @author iFlytek
* @since 20131211
*/
public class JsonParser {
/**
* 听写结果的Json格式解析
* @param json
* @return
*/
public static String parseIatResult(String json) {
if(TextUtils.isEmpty(json))
return "";
StringBuffer ret = new StringBuffer();
try {
JSONTokener tokener = new JSONTokener(json);
JSONObject joResult = new JSONObject(tokener);
JSONArray words = joResult.getJSONArray("ws");
for (int i = 0; i < words.length(); i++) {
JSONArray items = words.getJSONObject(i).getJSONArray("cw");
JSONObject obj = items.getJSONObject(0);
ret.append(obj.getString("w"));
}
} catch (Exception e) {
e.printStackTrace();
}
return ret.toString();
}
}