001

* Copyright (C)2008The Android Open Source Project

002

*

003

* Licensed under the Apache License, Version2.0(the"License");

004

* you may not usethisfile 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 Licenseforthe specific language governing permissions and

013

* limitations under the License.

014

*/

015

016

packagecom.example.android.apis.app;

017

018

importcom.example.android.apis.R;

019

020

importandroid.app.Activity;

021

importandroid.content.Intent;

022

importandroid.content.pm.PackageManager;

023

importandroid.content.pm.ResolveInfo;

024

importandroid.os.Bundle;

025

importandroid.speech.RecognizerIntent;

026

importandroid.view.View;

027

importandroid.view.View.OnClickListener;

028

importandroid.widget.ArrayAdapter;

029

importandroid.widget.Button;

030

importandroid.widget.ListView;

031

032

importjava.util.ArrayList;

033

importjava.util.List;

034

035

/**

036

* Sample code that invokes the speech recognition intent API.

037

*/

038

publicclassVoiceRecognitionextendsActivityimplementsOnClickListener {

039

040

privatestaticfinalintVOICE_RECOGNITION_REQUEST_CODE =1234;

041

042

privateListView mList;

043

044

/**

045

* Called with the activity is first created.

046

*/

047

@Override

048

publicvoidonCreate(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

newIntent(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

publicvoidonClick(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

privatevoidstartVoiceRecognitionActivity() {

084

Intent intent =newIntent(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

protectedvoidonActivityResult(intrequestCode,intresultCode, 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(newArrayAdapter(this, android.R.layout.simple_list_item_1,

101

matches));

102

}

103

104

super.onActivityResult(requestCode, resultCode, data);

105

}

106

}