android 语音识别

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：

        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：

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);
	}
    
    
}