android实现语音识别功能,Android 轻松实现语音识别
/** Copyright (C) 2008 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
*http://www.apache.org/licenses/LICENSE-2.0*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.*/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;/*** Sample code that invokes the speech recognition intent API.*/publicclassVoiceRecognitionextendsActivityimplementsOnClickListener {privatestaticfinalintVOICE_RECOGNITION_REQUEST_CODE=1234;privateListView mList;/*** Called with the activity is first created.*/@OverridepublicvoidonCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);//Inflate our UI from its XML layout description.setContentView(R.layout.voice_recognition);//Get display items for later interactionButton speakButton=(Button) findViewById(R.id.btn_speak);
mList=(ListView) findViewById(R.id.list);//Check to see if a recognition activity is presentPackageManager pm=getPackageManager();
Listactivities=pm.queryIntentActivities(newIntent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH),0);if(activities.size()!=0) {
speakButton.setOnClickListener(this);
}else{
speakButton.setEnabled(false);
speakButton.setText("Recognizer not present");
}
}/*** Handle the click on the start recognition button.*/publicvoidonClick(View v) {if(v.getId()==R.id.btn_speak) {
startVoiceRecognitionActivity();
}
}/*** Fire an intent to start the speech recognition activity.*/privatevoidstartVoiceRecognitionActivity() {
Intent intent=newIntent(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);
}/*** Handle the results from the recognition activity.*/@OverrideprotectedvoidonActivityResult(intrequestCode,intresultCode, Intent data) {if(requestCode==VOICE_RECOGNITION_REQUEST_CODE&&resultCode==RESULT_OK) {//Fill the list view with the strings the recognizer thought it could have heardArrayListmatches=data.getStringArrayListExtra(
RecognizerIntent.EXTRA_RESULTS);
mList.setAdapter(newArrayAdapter(this, android.R.layout.simple_list_item_1,
matches));
}super.onActivityResult(requestCode, resultCode, data);
}
}