Android实现语音识别 .

苹果的iphone的语音识别功能使用的是Google的技术，做为Google力推的Android自然会将其核心技术植入到Android系统里面，并结合google的云端技术将其发扬光大。

所以Google Voice Recognition在Android中的实现就变得非常轻松。

Android语音识别，借助于云端技术可以识别用户的语音输入，包括语音控制等技术，下面我们将利用Google提供的Api实现这一功能。

功能点为：通过用户语音将用户输入的语音识别出来，并打印在列表上。

功能界面如下：

用户通过点击speak按钮显示界面：

用户说完话后，将提交到云端搜索：

在云端搜索完成后，返回打印数据：

完整代码如下：

[java] view plain copy print ?

1. package com.example.android.apis.app;  
2.    
3. import com.example.android.apis.R;  
4.    
5. import android.app.Activity;  
6. import android.content.Intent;  
7. import android.content.pm.PackageManager;  
8. import android.content.pm.ResolveInfo;  
9. import android.os.Bundle;  
10. import android.speech.RecognizerIntent;  
11. import android.view.View;  
12. import android.view.View.OnClickListener;  
13. import android.widget.ArrayAdapter;  
14. import android.widget.Button;  
15. import android.widget.ListView;  
16.    
17. import java.util.ArrayList;  
18. import java.util.List;  
19.    
20. /** 
21.  * Sample code that invokes the speech recognition intent API. 
22.  */  
23. public class VoiceRecognition extends Activity implements OnClickListener {  
24.    
25.     private static final int VOICE_RECOGNITION_REQUEST_CODE = 1234;  
26.    
27.     private ListView mList;  
28.    
29.     /** 
30.      * Called with the activity is first created. 
31.      */  
32.     @Override  
33.     public void onCreate(Bundle savedInstanceState) {  
34.         super.onCreate(savedInstanceState);  
35.    
36.         // Inflate our UI from its XML layout description.   
37.         setContentView(R.layout.voice_recognition);  
38.    
39.         // Get display items for later interaction   
40.         Button speakButton = (Button) findViewById(R.id.btn_speak);  
41.    
42.         mList = (ListView) findViewById(R.id.list);  
43.    
44.         // Check to see if a recognition activity is present   
45.         PackageManager pm = getPackageManager();  
46.         List<ResolveInfo> activities = pm.queryIntentActivities(new Intent(  
47.                 RecognizerIntent.ACTION_RECOGNIZE_SPEECH), 0);  
48.         if (activities.size() != 0) {  
49.             speakButton.setOnClickListener(this);  
50.         } else {  
51.             speakButton.setEnabled(false);  
52.             speakButton.setText("Recognizer not present");  
53.         }  
54.     }  
55.    
56.     /** 
57.      * Handle the click on the start recognition button. 
58.      */  
59.     public void onClick(View v) {  
60.         if (v.getId() == R.id.btn_speak) {  
61.             startVoiceRecognitionActivity();  
62.         }  
63.     }  
64.    
65.     /** 
66.      * Fire an intent to start the speech recognition activity. 
67.      */  
68.     private void startVoiceRecognitionActivity() {  
69.         Intent intent = new Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH);  
70.         intent.putExtra(RecognizerIntent.EXTRA_LANGUAGE_MODEL,  
71.                 RecognizerIntent.LANGUAGE_MODEL_FREE_FORM);  
72.         intent.putExtra(RecognizerIntent.EXTRA_PROMPT,  
73.                 "Speech recognition demo");  
74.         startActivityForResult(intent, VOICE_RECOGNITION_REQUEST_CODE);  
75.     }  
76.    
77.     /** 
78.      * Handle the results from the recognition activity. 
79.      */  
80.     @Override  
81.     protected void onActivityResult(int requestCode, int resultCode, Intent data) {  
82.         if (requestCode == VOICE_RECOGNITION_REQUEST_CODE  
83.                 && resultCode == RESULT_OK) {  
84.             // Fill the list view with the strings the recognizer thought it   
85.             // could have heard   
86.             ArrayList<String> matches = data  
87.                     .getStringArrayListExtra(RecognizerIntent.EXTRA_RESULTS);  
88.             mList.setAdapter(new ArrayAdapter<String>(this,  
89.                     android.R.layout.simple_list_item_1, matches));  
90.         }  
91.    
92.         super.onActivityResult(requestCode, resultCode, data);  
93.     }  
94. }  

package com.example.android.apis.app;
 
import com.example.android.apis.R;
 
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;
 
/**
 * Sample code that invokes the speech recognition intent API.
 */
public class VoiceRecognition extends Activity implements OnClickListener {
 
    private static final int VOICE_RECOGNITION_REQUEST_CODE = 1234;
 
    private ListView mList;
 
    /**
     * Called with the activity is first created.
     */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
 
        // Inflate our UI from its XML layout description.
        setContentView(R.layout.voice_recognition);
 
        // Get display items for later interaction
        Button speakButton = (Button) findViewById(R.id.btn_speak);
 
        mList = (ListView) findViewById(R.id.list);
 
        // Check to see if a recognition activity is present
        PackageManager pm = getPackageManager();
        List<ResolveInfo> activities = pm.queryIntentActivities(new Intent(
                RecognizerIntent.ACTION_RECOGNIZE_SPEECH), 0);
        if (activities.size() != 0) {
            speakButton.setOnClickListener(this);
        } else {
            speakButton.setEnabled(false);
            speakButton.setText("Recognizer not present");
        }
    }
 
    /**
     * Handle the click on the start recognition button.
     */
    public void onClick(View v) {
        if (v.getId() == R.id.btn_speak) {
            startVoiceRecognitionActivity();
        }
    }
 
    /**
     * Fire an intent to start the speech recognition activity.
     */
    private void startVoiceRecognitionActivity() {
        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);
    }
 
    /**
     * Handle the results from the recognition activity.
     */
    @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));
        }
 
        super.onActivityResult(requestCode, resultCode, data);
    }
}