【Google Voice】Android 轻松实现语音识别
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Google Voice Recognition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：
Android 轻松实现语音识别的完整代码
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* Copyright (C) 2008 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.example.android.apis.app;
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import com.example.android.apis.R;
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import android.app.Activity;
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import android.content.Intent;
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import android.content.pm.PackageManager;
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import android.content.pm.ResolveInfo;
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import android.os.Bundle;
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import android.speech.RecognizerIntent;
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import android.view.View;
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import android.view.View.OnClickListener;
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import android.widget.ArrayAdapter;
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import android.widget.Button;
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import android.widget.ListView;
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import java.util.ArrayList;
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import java.util.List;
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/**
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* Sample code that invokes the speech recognition intent API.
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*/
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public class VoiceRecognition extends Activity implements OnClickListener {
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private static final int VOICE_RECOGNITION_REQUEST_CODE = 1234;
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private ListView mList;
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/**
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* Called with the activity is first created.
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*/
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@Override
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public void onCreate(Bundle savedInstanceState) {
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super.onCreate(savedInstanceState);
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// Inflate our UI from its XML layout description.
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setContentView(R.layout.voice_recognition);
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// Get display items for later interaction
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Button speakButton = (Button) findViewById(R.id.btn_speak);
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mList = (ListView) findViewById(R.id.list);
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// Check to see if a recognition activity is present
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PackageManager pm = getPackageManager();
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List activities = pm.queryIntentActivities(
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new Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH), 0);
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if (activities.size() != 0) {
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speakButton.setOnClickListener(this);
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} else {
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speakButton.setEnabled(false);
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speakButton.setText("Recognizer not present");
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}
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}
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/**
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* Handle the click on the start recognition button.
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*/
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public void onClick(View v) {
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if (v.getId() == R.id.btn_speak) {
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startVoiceRecognitionActivity();
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}
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}
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/**
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* Fire an intent to start the speech recognition activity.
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*/
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private void startVoiceRecognitionActivity() {
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Intent intent = new Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH);
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intent.putExtra(RecognizerIntent.EXTRA_LANGUAGE_MODEL,
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RecognizerIntent.LANGUAGE_MODEL_FREE_FORM);
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intent.putExtra(RecognizerIntent.EXTRA_PROMPT, "Speech recognition demo");
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startActivityForResult(intent, VOICE_RECOGNITION_REQUEST_CODE);
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}
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/**
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* Handle the results from the recognition activity.
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*/
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@Override
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protected void onActivityResult(int requestCode, int resultCode, Intent data) {
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if (requestCode == VOICE_RECOGNITION_REQUEST_CODE && resultCode == RESULT_OK) {
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// Fill the list view with the strings the recognizer thought it could have heard
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ArrayList matches = data.getStringArrayListExtra(
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RecognizerIntent.EXTRA_RESULTS);
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mList.setAdapter(new ArrayAdapter(this, android.R.layout.simple_list_item_1,
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matches));
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}
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super.onActivityResult(requestCode, resultCode, data);
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}
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