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android 语音识别 android开发教程

首先可以用以下代码测试你的机器是不是有语音识别功能:[java]倀愀挀欀愀最攀Manager pm = getPackageManager();List<ResolveInfo> a...

首先可以用以下代码测试你的机器是不是有语音识别功能:
[java] 
PackageManager pm = getPackageManager(); 
List<ResolveInfo> activities = pm.queryIntentActivities( 
        new Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH), 0); 
if (activities.size() != 0) { 
    /*Activity  存在*/ 
    Toast.makeText(AndroidVoiceActivity.this, "Activity  存在", Toast.LENGTH_LONG).show(); 
} else { 
    /*  Activity  Not  Found   未判断会抛出ActivityNotFoundException*/ 
    Toast.makeText(AndroidVoiceActivity.this, "Activity  不存在", Toast.LENGTH_LONG).show(); 

简单的Activity:
[java] 
package com.relin.voice; 
 
import java.util.ArrayList; 
import java.util.List; 
 
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.Button; 
import android.widget.Toast; 
 
public class AndroidVoiceActivity extends Activity { 
    /** Called when the activity is first created. */ 
    private static final int VOICE_RECOGNITION_REQUEST_CODE = 1; 
    @Override 
    public void onCreate(Bundle savedInstanceState) { 
        super.onCreate(savedInstanceState); 
        setContentView(R.layout.main); 
         
        Button button = (Button)findViewById(R.id.button1); 
 
        button.setOnClickListener(new OnClickListener() { 
             
            @Override 
            public void onClick(View v) { 
                // TODO Auto-generated method stub 
                try{ 
                    Intent intent = new Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH); 
                    intent.putExtra(RecognizerIntent.EXTRA_LANGUAGE_MODEL, RecognizerIntent.LANGUAGE_MODEL_FREE_FORM); 
                    intent.putExtra(RecognizerIntent.EXTRA_PROMPT, "开始语音"); 
                    startActivityForResult(intent, VOICE_RECOGNITION_REQUEST_CODE); 
                }catch (Exception e) { 
                    // TODO: handle exception 
                    Toast.makeText(AndroidVoiceActivity.this, "ActivityNotFoundException", Toast.LENGTH_LONG).show(); 
                } 
            } 
        }); 
    } 
    @Override 
    protected void onActivityResult(int requestCode, int resultCode, Intent data) { 
        // TODO Auto-generated method stub 
        if (requestCode == VOICE_RECOGNITION_REQUEST_CODE && resultCode == RESULT_OK) { 
            ArrayList<String> result = data.getStringArrayListExtra(RecognizerIntent.EXTRA_RESULTS); 
            String resultString = ""; 
            for (int i = 0; i < result.size(); i++) { 
                resultString += result.get(i); 
            } 
            Toast.makeText(this, resultString, Toast.LENGTH_LONG).show(); 
        } 
        super.onActivityResult(requestCode, resultCode, data); 
    }