语音识别技术

Android由于有了Google的支持，那么他的语音识别做起来也是比较简单的，主要是调用谷歌的语音识别软件，然后取得他的返回值，谷歌的语音识别有着极其庞大的云中心以及数据库。当然语音识别是存在一个精度问题的，所以谷歌语音识别软件的返回值不是唯一的，因此到时候需要自己做筛选或者处理：package com.ichances.voice;

 1 import java.util.ArrayList;
 2 
 3 import android.app.Activity;
 4 import android.content.Intent;
 5 import android.os.Bundle;
 6 import android.speech.RecognizerIntent;
 7 import android.util.Log;
 8 import android.view.View;
 9 import android.view.View.OnClickListener;
10 import android.widget.Button;
11 import android.widget.TextView;
12 import android.widget.Toast;
13 
14 public class VoiceActivity extends Activity {
15     /** Called when the activity is first created. */
16     private Button btnReconizer;
17     private static final int VOICE_RECOGNITION_REQUEST_CODE =618;
18     private TextView resText;
19 
20     @Override
21     protected void onCreate(Bundle savedInstanceState) {
22         // TODO Auto-generated method stub
23         super.onCreate(savedInstanceState);
24         setContentView(R.layout.main);
25         btnReconizer = (Button) this.findViewById(R.id.button1);
26         resText = (TextView) findViewById(R.id.restext);
27         btnReconizer.setOnClickListener(new OnClickListener() {
28             @Override
29             public void onClick(View v) {
30                 // TODO Auto-generated method stub
31                 try {
32                     // 通过Intent传递语音识别的模式，开启语音
33                     Intent intent = new Intent(
34                             RecognizerIntent.ACTION_RECOGNIZE_SPEECH);
35                     // 语言模式和自由模式的语音识别
36                     intent.putExtra(RecognizerIntent.EXTRA_LANGUAGE_MODEL,
37                             RecognizerIntent.LANGUAGE_MODEL_FREE_FORM);
38                     // 提示语音开始
39                     intent.putExtra(RecognizerIntent.EXTRA_PROMPT, "开始语音");
40                     // 开始语音识别
41                     startActivityForResult(intent,
42                             VOICE_RECOGNITION_REQUEST_CODE);
43                 } catch (Exception e) {
44                     // TODO: handle exception
45                     e.printStackTrace();
46                     Toast.makeText(getApplicationContext(), "找不到语音设备", 1)
47                             .show();
48                 }
49             }
50         });
51     }
52 
53     @Override
54     protected void onActivityResult(int requestCode, int resultCode, Intent data) {
55         // TODO Auto-generated method stub
56         // 回调获取从谷歌得到的数据
57         if (requestCode == VOICE_RECOGNITION_REQUEST_CODE
58                 && resultCode == RESULT_OK) {
59             // 取得语音的字符
60             ArrayList<String> results = data
61                     .getStringArrayListExtra(RecognizerIntent.EXTRA_RESULTS);
62             String resultString = "";
63             for (int i = 0; i < results.size(); i++) {
64                 resultString += String.valueOf(i + 1) + ":" + results.get(i)
65                         + ";";
66                 Log.i("结果", resultString);
67             }
68             resText.setText(resultString);
69             Toast.makeText(this, resultString, 1).show();
70         }
71         super.onActivityResult(requestCode, resultCode, data);
72     }
73 }