Android輕鬆實現語音功能

蘋果的iphone 有語音識別用的是Google 的技術，作爲Google 力推的Android 天然會將其核心技術往Android 系統裏面植入，並結合google 的雲端技術將其發揚光大。 

因此Google Voice Recognition在Android 的實現就變得極其輕鬆。 
 
語音識別，藉助於雲端技術能夠識別用戶的語音輸入，包括語音控制等技術，下面咱們將利用Google 提供的Api 實現這一功能。 

功能點爲：經過用戶語音將用戶輸入的語音識別出來，並打印在列表上。 

功能界面以下： 
 
用戶經過點擊speak按鈕顯示界面： 
 
用戶說完話後，將提交到雲端搜索： 
 
在雲端搜索完成後，返回打印數據： 

代碼片斷(1)

[代碼] Android 輕鬆實現語音識別的完整代碼

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001	* Copyright (C) 2008 The Android Open Source Project

002

*

003	* Licensed under the Apache License, Version 2.0 (the "License");

004	* you may not use this file except in compliance with the License.

005	* You may obtain a copy of the License at

006

*

007	* http://www.apache.org/licenses/LICENSE-2.0

008

*

009	* Unless required by applicable law or agreed to in writing, software

010	* distributed under the License is distributed on an "AS IS" BASIS,

011	* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

012	* See the License for the specific language governing permissions and

013	* limitations under the License.

014

*/

015

016	package com.example.android.apis.app;

017

018	import com.example.android.apis.R;

019

020	import android.app.Activity;

021	import android.content.Intent;

022	import android.content.pm.PackageManager;

023	import android.content.pm.ResolveInfo;

024	import android.os.Bundle;

025	import android.speech.RecognizerIntent;

026	import android.view.View;

027	import android.view.View.OnClickListener;

028	import android.widget.ArrayAdapter;

029	import android.widget.Button;

030	import android.widget.ListView;

031

032	import java.util.ArrayList;

033	import java.util.List;

034

035

/**

036	* Sample code that invokes the speech recognition intent API.

037

*/

038	public class VoiceRecognition extends Activity implements OnClickListener {

039

040	private static final int VOICE_RECOGNITION_REQUEST_CODE = 1234;

041

042	private ListView mList;

043

044

/**

045	* Called with the activity is first created.

046

*/

047

@Override

048	public void onCreate(Bundle savedInstanceState) {

049	super.onCreate(savedInstanceState);

050

051	// Inflate our UI from its XML layout description.

052	setContentView(R.layout.voice_recognition);

053

054	// Get display items for later interaction

055	Button speakButton = (Button) findViewById(R.id.btn_speak);

056

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

058

059	// Check to see if a recognition activity is present

060	PackageManager pm = getPackageManager();

061	List activities = pm.queryIntentActivities(

062	new Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH), 0);

063	if (activities.size() != 0) {

064	speakButton.setOnClickListener(this);

065

} else {

066	speakButton.setEnabled(false);

067	speakButton.setText("Recognizer not present");

068

}

069

}

070

071

/**

072	* Handle the click on the start recognition button.

073

*/

074	public void onClick(View v) {

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

076	startVoiceRecognitionActivity();

077

}

078

}

079

080

/**

081	* Fire an intent to start the speech recognition activity.

082

*/

083	private void startVoiceRecognitionActivity() {

084	Intent intent = new Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH);

085	intent.putExtra(RecognizerIntent.EXTRA_LANGUAGE_MODEL,

086	RecognizerIntent.LANGUAGE_MODEL_FREE_FORM);

087	intent.putExtra(RecognizerIntent.EXTRA_PROMPT, "Speech recognition demo");

088	startActivityForResult(intent, VOICE_RECOGNITION_REQUEST_CODE);

089

}

090

091

/**

092	* Handle the results from the recognition activity.

093

*/

094

@Override

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

096	if (requestCode == VOICE_RECOGNITION_REQUEST_CODE && resultCode == RESULT_OK) {

097	// Fill the list view with the strings the recognizer thought it could have heard

098	ArrayList matches = data.getStringArrayListExtra(

099	RecognizerIntent.EXTRA_RESULTS);

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

101	matches));

102

}

103

104	super.onActivityResult(requestCode, resultCode, data);

105

}

106

}