Android 輕松實現語音識別

蘋果的iphone 有語音識別用的是Google 的技術，做為Google 力推的Android 自然會將其核心技術往Android 系統裡面植入，並結合google 的雲端技術將其發揚光大。

所以Google Voice Recognition在Android 的實現就變得極其輕松。

語音識別，借助於雲端技術可以識別用戶的語音輸入，包括語音控制等技術，下面我們將利用Google 提供的Api 實現這一功能。

功能點為：通過用戶語音將用戶輸入的語音識別出來，並打印在列表上。

功能界面如下：

用戶通過點擊speak按鈕顯示界面：

用戶說完話後，將提交到雲端搜索：

在雲端搜索完成後，返回打印數據：

Android 輕松實現語音識別的完整代碼

Java代碼

1. * Copyright (C) 2008 The Android Open Source Project
2. *
3. * Licensed under the Apache License, Version 2.0 (the "License");
4. * you may not use this file except in compliance with the License.
5. * You may obtain a copy of the License at
6. *
7. * http://www.apache.org/licenses/LICENSE-2.0
8. *
9. * Unless required by applicable law or agreed to in writing, software
10. * distributed under the License is distributed on an "AS IS" BASIS,
11. * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12. * See the License for the specific language governing permissions and
13. * limitations under the License.
14. */
16. package com.example.android.apis.app;
18. import com.example.android.apis.R;
20. import android.app.Activity;
21. import android.content.Intent;
22. import android.content.pm.PackageManager;
23. import android.content.pm.ResolveInfo;
24. import android.os.Bundle;
25. import android.speech.RecognizerIntent;
26. import android.view.View;
27. import android.view.View.OnClickListener;
28. import android.widget.ArrayAdapter;
29. import android.widget.Button;
30. import android.widget.ListView;
32. import java.util.ArrayList;
33. import java.util.List;
35. /**
36. * Sample code that invokes the speech recognition intent API.
37. */
38. public class VoiceRecognition extends Activity implements OnClickListener {
40. private static final int VOICE_RECOGNITION_REQUEST_CODE = 1234;
42. private ListView mList;
44. /**
45. * Called with the activity is first created.
46. */
47. @Override
48. public void onCreate(Bundle savedInstanceState) {
49. super.onCreate(savedInstanceState);
51. // Inflate our UI from its XML layout description.
52. setContentView(R.layout.voice_recognition);
54. // Get display items for later interaction
55. Button speakButton = (Button) findViewById(R.id.btn_speak);
57. mList = (ListView) findViewById(R.id.list);
59. // Check to see if a recognition activity is present
60. PackageManager pm = getPackageManager();
61. List activities = pm.queryIntentActivities(
62. new Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH), 0);
63. if (activities.size() != 0) {
64. speakButton.setOnClickListener(this);
65. } else {
66. speakButton.setEnabled(false);
67. speakButton.setText("Recognizer not present");
68. }
69. }
71. /**
72. * Handle the click on the start recognition button.
73. */
74. public void onClick(View v) {
75. if (v.getId() == R.id.btn_speak) {
76. startVoiceRecognitionActivity();
77. }
78. }
80. /**
81. * Fire an intent to start the speech recognition activity.
82. */
83. private void startVoiceRecognitionActivity() {
84. Intent intent = new Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH);
85. intent.putExtra(RecognizerIntent.EXTRA_LANGUAGE_MODEL,
86. RecognizerIntent.LANGUAGE_MODEL_FREE_FORM);
87. intent.putExtra(RecognizerIntent.EXTRA_PROMPT, "Speech recognition demo");
88. startActivityForResult(intent, VOICE_RECOGNITION_REQUEST_CODE);
89. }
91. /**
92. * Handle the results from the recognition activity.
93. */
94. @Override
95. protected void onActivityResult(int requestCode, int resultCode, Intent data) {
96. if (requestCode == VOICE_RECOGNITION_REQUEST_CODE && resultCode == RESULT_OK) {
97. // Fill the list view with the strings the recognizer thought it could have heard
98. ArrayList matches = data.getStringArrayListExtra(
99. RecognizerIntent.EXTRA_RESULTS);
100. mList.setAdapter(new ArrayAdapter(this, android.R.layout.simple_list_item_1,
101. matches));
102. }
104. super.onActivityResult(requestCode, resultCode, data);
105. }
106. }