android语音识别方法一：使用intent调用语音识别程序

1. 说明
以下例程功能为：在应用程序中使用intent来调出语言识别界面，录音并识别后将识别的字串返回给应用程序。注意：使用前需要安装语音识别程序如语音搜索。

2. 本例参考自android例程：
development/samples/ApiDemos/src/com/example/android/apis/app/VoiceRecognition.java

3. 可从此处下载可独立运行的代码：
http://download.csdn.net/source/2591401

4. 核心代码及说明

package com.android.mystt1;

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;

public class MyStt1Activity extends Activity implements OnClickListener {

private static final int VOICE_RECOGNITION_REQUEST_CODE = 1234;

private ListView mList; // 显示识别后字串的list控件

@Override

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.main);

Button speakButton = (Button) findViewById(R.id.btn_speak); // 识别按钮

mList = (ListView) findViewById(R.id.list);

PackageManager pm = getPackageManager();

List activities = pm.queryIntentActivities(

new Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH), 0); //本地识别程序

// new Intent(RecognizerIntent.ACTION_WEB_SEARCH), 0); // 网络识别程序

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

speakButton.setOnClickListener(this);

} else { // 若检测不到语音识别程序在本机安装，测将扭铵置灰

speakButton.setEnabled(false);

speakButton.setText("Recognizer not present");

}

public void onClick(View v) {

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

startMysttActivityActivity();

}

private void startMysttActivityActivity() { // 开始识别

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);
// 调出识别界面

}

@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 matches = data.getStringArrayListExtra(

RecognizerIntent.EXTRA_RESULTS);

mList.setAdapter(new ArrayAdapter(this, android.R.layout.simple_list_item_1,

matches));

}

// 语音识别后的回调，将识别的字串在list中显示

super.onActivityResult(requestCode, resultCode, data);

}

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