android VoiceRecognition 语音识别并打印到列表上

package com.example.wenandroid;



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.ArrayAdapter;

import android.widget.Button;

import android.widget.ListView;



public class VoiceRecognizeDemo extends Activity implements OnClickListener {

private static final int VOICE_RECOGNITION_REQUEST_CODE=1234;

private ListView listview;

private Button btn;



	@Override

protected void onCreate(Bundle savedInstanceState) {

	super.onCreate(savedInstanceState);

	setContentView(R.layout.voicerecogenize);

	listview=(ListView)findViewById(R.id.listview);

	btn=(Button)findViewById(R.id.btn);

	PackageManager pm=getPackageManager();

	List<ResolveInfo> activities = pm.queryIntentActivities(

            new Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH), 0);

    if (activities.size() != 0) {

        btn.setOnClickListener(this);

    } else {

        btn.setEnabled(false);

        btn.setText("Recognizer not present");

    }



}



	@Override

	public void onClick(View v) {

		if(v.getId()==R.id.btn){

			startVoiceRecognitionActivity();

		}



	}



	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);

	}



	@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);

	            listview.setAdapter(new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1,

	                    matches));

	        }



		super.onActivityResult(requestCode, resultCode, data);

	}

	

}

界面只有一个listview和一个button。