【Google Voice】Android(安卓)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001* Copyright (C) 2008 The Android Open Source Project002*003* Licensed under the Apache License, Version 2.0 (the "License");004* you may not use this file except in compliance with the License.005* You may obtain a copy of the License at006*007* http://www.apache.org/licenses/LICENSE-2.0008*009* Unless required by applicable law or agreed to in writing, software010* 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 License for the specific language governing permissions and013* limitations under the License.014*/015 016package com.example.android.apis.app;017 018import com.example.android.apis.R;019 020import android.app.Activity;021import android.content.Intent;022import android.content.pm.PackageManager;023import android.content.pm.ResolveInfo;024import android.os.Bundle;025import android.speech.RecognizerIntent;026import android.view.View;027import android.view.View.OnClickListener;028import android.widget.ArrayAdapter;029import android.widget.Button;030import android.widget.ListView;031 032import java.util.ArrayList;033import java.util.List;034 035/**036* Sample code that invokes the speech recognition intent API.037*/038public class VoiceRecognition extends Activity implements OnClickListener {039 040private static final int VOICE_RECOGNITION_REQUEST_CODE = 1234;041 042private ListView mList;043 044/**045* Called with the activity is first created.046*/047@Override048public void onCreate(Bundle savedInstanceState) {049super.onCreate(savedInstanceState);050 051// Inflate our UI from its XML layout description.052setContentView(R.layout.voice_recognition);053 054// Get display items for later interaction055Button speakButton = (Button) findViewById(R.id.btn_speak);056 057mList = (ListView) findViewById(R.id.list);058 059// Check to see if a recognition activity is present060PackageManager pm = getPackageManager();061List activities = pm.queryIntentActivities(062new Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH), 0);063if (activities.size() != 0) {064speakButton.setOnClickListener(this);065} else {066speakButton.setEnabled(false);067speakButton.setText("Recognizer not present");068}069}070 071/**072* Handle the click on the start recognition button.073*/074public void onClick(View v) {075if (v.getId() == R.id.btn_speak) {076startVoiceRecognitionActivity();077}078}079 080/**081* Fire an intent to start the speech recognition activity.082*/083private void startVoiceRecognitionActivity() {084Intent intent = new Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH);085intent.putExtra(RecognizerIntent.EXTRA_LANGUAGE_MODEL,086RecognizerIntent.LANGUAGE_MODEL_FREE_FORM);087intent.putExtra(RecognizerIntent.EXTRA_PROMPT, "Speech recognition demo");088startActivityForResult(intent, VOICE_RECOGNITION_REQUEST_CODE);089}090 091/**092* Handle the results from the recognition activity.093*/094@Override095protected void onActivityResult(int requestCode, int resultCode, Intent data) {096if (requestCode == VOICE_RECOGNITION_REQUEST_CODE && resultCode == RESULT_OK) {097// Fill the list view with the strings the recognizer thought it could have heard098ArrayList matches = data.getStringArrayListExtra(099RecognizerIntent.EXTRA_RESULTS);100mList.setAdapter(new ArrayAdapter(this, android.R.layout.simple_list_item_1,101matches));102}103 104super.onActivityResult(requestCode, resultCode, data);105}106

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