1.     说明
以下例程功能为：在应用程序中使用intent来调出语言识别界面，录音并识别后将识别的字串返回给应用程序。注意：使用前需要安装语音识别程序如语音搜索。

2.     本例参考自android例程：
development/samples/ApiDemos/src/com/example/android/apis/app/VoiceRecognition.java

3.     可从此处下载可独立运行的代码：
http://download.csdn.net/source/2591401

4.     核心代码及说明

package com.android.mystt1; 
 
import android.app.Activity; 
import android.content.Intent; 
import android.content.pm.PackageManager; 
import android.content.pm.ResolveInfo; 
import android.os.Bundle; 
import android.speech.RecognizerIntent; 
import android.view.View; 
import android.view.View.OnClickListener; 
import android.widget.ArrayAdapter; 
import android.widget.Button; 
import android.widget.ListView; 
  
import java.util.ArrayList; 
import java.util.List; 
 
public class MyStt1Activity extends Activity implements OnClickListener { 
       private static final int VOICE_RECOGNITION_REQUEST_CODE = 1234; 
       private ListView mList;          // 显示识别后字串的list控件 
 
       @Override 
       public void onCreate(Bundle savedInstanceState) { 
                super.onCreate(savedInstanceState); 
                setContentView(R.layout.main); 
                Button speakButton = (Button) findViewById(R.id.btn_speak); // 识别按钮 
                 mList = (ListView) findViewById(R.id.list); 
                PackageManager pm = getPackageManager(); 
                List<ResolveInfo> activities = pm.queryIntentActivities( 
new Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH), 0); //本地识别程序 
//new Intent(RecognizerIntent.ACTION_WEB_SEARCH), 0); // 网络识别程序 
                if (activities.size() != 0) { 
                      speakButton.setOnClickListener(this); 
                } else {// 若检测不到语音识别程序在本机安装，测将扭铵置灰 
                         speakButton.setEnabled(false); 
                         speakButton.setText("Recognizer not present"); 
                } 
       } 
 
       public void onClick(View v) { 
                if (v.getId() == R.id.btn_speak) { 
                         startMysttActivityActivity(); 
                } 
       } 
       private void startMysttActivityActivity() {          // 开始识别 
                Intent intent = new Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH); 
               intent.putExtra(RecognizerIntent.EXTRA_LANGUAGE_MODEL, 
                                   RecognizerIntent.LANGUAGE_MODEL_FREE_FORM); 
                intent.putExtra(RecognizerIntent.EXTRA_PROMPT, "Speech recognition demo"); 
                startActivityForResult(intent, VOICE_RECOGNITION_REQUEST_CODE); 
                // 调出识别界面 
    } 
       @Override 
    protected void onActivityResult(int requestCode, int resultCode, Intent data) { 
                if (requestCode == VOICE_RECOGNITION_REQUEST_CODE && resultCode == RESULT_OK) { 
// Fill the list view with the strings the recognizer thought it could have heard 
ArrayList<String> matches = data.getStringArrayListExtra(RecognizerIntent.EXTRA_RESULTS); 
mList.setAdapter(new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, 
matches)); 
                } 
                // 语音识别后的回调，将识别的字串在list中显示 
                super.onActivityResult(requestCode, resultCode, data); 
       } 
} 

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