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
Java代码
- * 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.
- */
- package com.example.android.apis.app;
- import com.example.android.apis.R;
- import android.app.Activity;
- import android.content.Intent;
- import android.content.pm.PackageManager;
- import android.content.pm.ResolveInfo;
- import android.os.Bundle;
- import android.speech.RecognizerIntent;
- import android.view.View;
- import android.view.View.OnClickListener;
- import android.widget.ArrayAdapter;
- import android.widget.Button;
- import android.widget.ListView;
- import java.util.ArrayList;
- import java.util.List;
- /**
- * Sample code that invokes the speech recognition intent API.
- */
- public class VoiceRecognition extends Activity implements OnClickListener {
- private static final int VOICE_RECOGNITION_REQUEST_CODE = 1234;
- private ListView mList;
- /**
- * Called with the activity is first created.
- */
- @Override
- public void onCreate(Bundle savedInstanceState) {
- super.onCreate(savedInstanceState);
- // Inflate our UI from its XML layout description.
- setContentView(R.layout.voice_recognition);
- // Get display items for later interaction
- Button speakButton = (Button) findViewById(R.id.btn_speak);
- mList = (ListView) findViewById(R.id.list);
- // Check to see if a recognition activity is present
- PackageManager pm = getPackageManager();
- List activities = pm.queryIntentActivities(
- new Intent(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.
- */
- public void onClick(View v) {
- if (v.getId() == R.id.btn_speak) {
- startVoiceRecognitionActivity();
- }
- }
- /**
- * Fire an intent to start the speech recognition activity.
- */
- private void startVoiceRecognitionActivity() {
- Intent intent = new Intent(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.
- */
- @Override
- protected void onActivityResult(int requestCode, int resultCode, Intent data) {
- if (requestCode == VOICE_RECOGNITION_REQUEST_CODE && resultCode == RESULT_OK) {
- // Fill the list view with the strings the recognizer thought it could have heard
- ArrayList matches = data.getStringArrayListExtra(
- RecognizerIntent.EXTRA_RESULTS);
- mList.setAdapter(new ArrayAdapter(this, android.R.layout.simple_list_item_1,
- matches));
- }
- super.onActivityResult(requestCode, resultCode, data);
- }
- }
