Android TTS文字转语音开发

<span style="font-family: Arial, Helvetica, sans-serif; background-color: rgb(255, 255, 255);">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。</span>

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);

	}

这样就可以了。

接下来讲一下如何实现语音识别