Android 轻松实现语音识别
老 发布于 2010年12月17日 8时, 21评/10412阅 ( 43人收藏, 收藏 ) 顶 0 踩
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：
标签： Android 语音识别 Android SDK
代码片段(1)
[代码] Android 轻松实现语音识别的完整代码
view source print?
001 * Copyright (C) 2008 The Android Open Source Project 002 *
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 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, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or 011
implied. 012 * See the License for the specific language governing permissions and 013 * limitations under the License. 014 */ 015
016 package com.example.android.apis.app;
017
018 import com.example.android.apis.R; 019
020 import android.app.Activity; 021 import android.content.Intent;
022 import android.content.pm.PackageManager; 023 import android.content.pm.ResolveInfo; 024 import android.os.Bundle;
025 import android.speech.RecognizerIntent; 026 import android.view.View;
027 import android.view.View.OnClickListener; 028 import android.widget.ArrayAdapter; 029 import android.widget.Button; 030 import android.widget.ListView; 031
032 import java.util.ArrayList; 033 import java.util.List; 034 035 /**
036 * Sample code that invokes the speech recognition intent API. 037 */
public class VoiceRecognition extends Activity implements 038
OnClickListener { 039
040 private static final int VOICE_RECOGNITION_REQUEST_CODE = 1234; 041
042 private ListView mList; 043 044 /**
045 * Called with the activity is first created. 046 */ 047 @Override
048 public void onCreate(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 new Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH), 0); 063 if (activities.size() != 0) {
0 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 public void onClick(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 private void startVoiceRecognitionActivity() { Intent intent = new 084
Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH); 085 intent.putExtra(RecognizerIntent.EXTRA_LANGUAGE_MODEL, 086 RecognizerIntent.LANGUAGE_MODEL_FREE_FORM);
intent.putExtra(RecognizerIntent.EXTRA_PROMPT, \"Speech recognition 087
demo\"); 088 startActivityForResult(intent, VOICE_RECOGNITION_REQUEST_CODE); 0 } 090 091 /**
092 * Handle the results from the recognition activity. 093 */ 094 @Override
protected void onActivityResult(int requestCode, int resultCode, 095
Intent data) { if (requestCode == VOICE_RECOGNITION_REQUEST_CODE && resultCode == 096
RESULT_OK) { // Fill the list view with the strings the recognizer thought it could 097
have heard 098 ArrayList matches = data.getStringArrayListExtra( 099 RecognizerIntent.EXTRA_RESULTS); mList.setAdapter(new ArrayAdapter(this, 100
android.R.layout.simple_list_item_1, 101 matches)); 102 } 103
104 super.onActivityResult(requestCode, resultCode, data); 105 } 106 }
