Android 轻松实现语音识别的完整代码 (转)

苹果的iphone有语音识别用的是Google的技术，做为Google力推的Android自然会将其核心技术往Android系统里面植入，并结合google的云端技术将其发扬光大。

所以GoogleVoiceRecognition在Android的实现就变得极其轻松。

语音识别，借助于云端技术可以识别用户的语音输入，包括语音控制等技术，下面我们将利用Google提供的Api实现这一功能。

功能点为：通过用户语音将用户输入的语音识别出来，并打印在列表上。

功能界面如下：

用户通过点击speak按钮显示界面：

用户说完话后，将提交到云端搜索：

在云端搜索完成后，返回打印数据：

*Copyright(C)2008TheAndroidOpenSourceProject

*

*LicensedundertheApacheLicense,Version2.0(the"License");

*youmaynotusethisfileexceptincompliancewiththeLicense.

*YoumayobtainacopyoftheLicenseat

*

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

*

*Unlessrequiredbyapplicablelaworagreedtoinwriting,software

*distributedundertheLicenseisdistributedonan"ASIS"BASIS,

*WITHOUTWARRANTIESORCONDITIONSOFANYKIND,eitherexpressorimplied.

*SeetheLicenseforthespecificlanguagegoverningpermissionsand

*limitationsundertheLicense.

*/

packagecom.example.android.apis.app;

importcom.example.android.apis.R;

importandroid.app.Activity;

importandroid.content.Intent;

importandroid.content.pm.PackageManager;

importandroid.content.pm.ResolveInfo;

importandroid.os.Bundle;

importandroid.speech.RecognizerIntent;

importandroid.view.View;

importandroid.view.View.OnClickListener;

importandroid.widget.ArrayAdapter;

importandroid.widget.Button;

importandroid.widget.ListView;

importjava.util.ArrayList;

importjava.util.List;

/**

*SamplecodethatinvokesthespeechrecognitionintentAPI.

*/

publicclassVoiceRecognitionextendsActivityimplementsOnClickListener{

privatestaticfinalintVOICE_RECOGNITION_REQUEST_CODE=1234;

privateListViewmList;

/**

*Calledwiththeactivityisfirstcreated.

*/

@Override

publicvoidonCreate(BundlesavedInstanceState){

super.onCreate(savedInstanceState);

//InflateourUIfromitsXMLlayoutdescription.

setContentView(R.layout.voice_recognition);

//Getdisplayitemsforlaterinteraction

ButtonspeakButton=(Button)findViewById(R.id.btn_speak);

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

//Checktoseeifarecognitionactivityispresent

PackageManagerpm=getPackageManager();

Listactivities=pm.queryIntentActivities(

newIntent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH),0);

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

speakButton.setOnClickListener(this);

}else{

speakButton.setEnabled(false);

speakButton.setText("Recognizernotpresent");

}

}

/**

*Handletheclickonthestartrecognitionbutton.

*/

publicvoidonClick(Viewv){

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

startVoiceRecognitionActivity();

}

}

/**

*Fireanintenttostartthespeechrecognitionactivity.

*/

privatevoidstartVoiceRecognitionActivity(){

Intentintent=newIntent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH);

intent.putExtra(RecognizerIntent.EXTRA_LANGUAGE_MODEL,

RecognizerIntent.LANGUAGE_MODEL_FREE_FORM);

intent.putExtra(RecognizerIntent.EXTRA_PROMPT,"Speechrecognitiondemo");

startActivityForResult(intent,VOICE_RECOGNITION_REQUEST_CODE);

}

/**

*Handletheresultsfromtherecognitionactivity.

*/

@Override

protectedvoidonActivityResult(intrequestCode,intresultCode,Intentdata){

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

//Fillthelistviewwiththestringstherecognizerthoughtitcouldhaveheard

ArrayListmatches=data.getStringArrayListExtra(

RecognizerIntent.EXTRA_RESULTS);

mList.setAdapter(newArrayAdapter(this,android.R.layout.simple_list_item_1,

matches));

}

super.onActivityResult(requestCode,resultCode,data);

}

}