语音识别（加注释）

import java.util.ArrayList;

import java.util.List;

import android.app.Activity;

import android.os.Bundle;

import android.speech.RecognizerIntent;

import android.view.View;

import android.widget.ArrayAdapter;

import android.widget.Button;

import android.widget.ListView;

import android.content.Intent;

import android.content.pm.PackageManager;

import android.content.pm.ResolveInfo;

public class TTSsuActivity extends Activity {

private Button btnSpeek=null;

private ListView listView=null;

private static final int REQ_CODE=100;

@Override

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.main);

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

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

PackageManager pm=getPackageManager();

//判断有无viod search

List<ResolveInfo> list=pm.queryIntentActivities(new Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH),0);

//如果没有

if(list.size()==0){

//Button不可用

btnSpeek.setEnabled(false);

//Button显示无法进行语音识别

btnSpeek.setText("无法进行语音识别");

}

public void speek(View view){

//通过Intent传递语音识别的模式,开启语音

Intent intent=new Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH);

//语言模式和自由形式的语音识别

intent.putExtra(RecognizerIntent.EXTRA_LANGUAGE_MODEL,RecognizerIntent.LANGUAGE_MODEL_FREE_FORM);

//提示

intent.putExtra(RecognizerIntent.EXTRA_PROMPT,"please speek");

//开始执行Intent、语音识别

startActivityForResult(intent,REQ_CODE);

}

@Override

//服务器端返回值

protected void onActivityResult(int requestCode, int resultCode, Intent data) {

super.onActivityResult(requestCode, resultCode, data);

//判断是否是我们执行的语音识别

if(requestCode==REQ_CODE&&resultCode==RESULT_OK){

//取得语音的字符

ArrayList<String> array=data.getStringArrayListExtra(RecognizerIntent.EXTRA_RESULTS);

//设置视图更新

ArrayAdapter adapter=new ArrayAdapter(getApplicationContext(), android.R.layout.simple_list_item_1,array);

listView.setAdapter(adapter);

}

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