Speech recognition on Android, a simple example of Google-based speech recognition.

Speech recognition is convenient and easy to use on Android.

However, there is a premise that Google's voice search tool must be installed on Android machines in advance.

Speech recognition technology is added in Android sdk1.5 (recognizerintent). Here we will analyze the built-in API example, which is actually completed through an intent action. There are two main modes:

Action_recognize_speech: Speech Recognition. In this mode, we can capture the text column after speech processing.

Action_web_search: Network Search

This example uses the action_recognize_speech mode. We need to implement the onactivityresult method, which is the callback function after the speech recognition is complete.

The following is the core code:

Package com. Ifeisu. Test. Voice;

Import the Java. Util. ArrayList;
Import the Java. Util. List;
The import android. App. The Activity;
The import android. Content. Intent;
The import android. Content. PM. PackageManager;
The import android. Content. PM. ResolveInfo;
The import android. OS. Bundle;
The import android. Researched. RecognizerIntent;
The import android. View. The view;
The import android. View. The view. An OnClickListener;
The import android. Widget. ArrayAdapter;
The import android. Widget. The Button;
The import android. Widget. ListView.
/ * * *
* speech recognition demo, before using this demo, you need to confirm that Google's voice search tool is installed on your phone or emulator
* voice_search_2.1.4.apk or later
* @ the author at guoxinzz@163.com
* @ website http://www.ifeisu.com
*
* /
Public class VoiceRecognition extends the Activity implements an 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);

The setContentView (R.l ayout. Main);

Button speakButton = (Button) findViewById(r.id.tn_speak);

MList = (ListView) the findViewById (R.i d.l ist);

// Check to see if a recognition activity is present

PackageManager PM = getPackageManager ();

List<resolveinfo> activities = pm.queryintentactivities (new Intent(</resolveinfo>
RecognizerIntent. ACTION_RECOGNIZE_SPEECH), 0);

If (activities. The size ()! = 0)

{

SpeakButton. SetOnClickListener (this);

}

The else

{

SpeakButton. SetEnabled (false);

SpeakButton. SetText (" Recognizer not present ");

}

}

Public void onClick (View v)

{

If (v.g etId () = = R.i db tn_speak)

{

StartVoiceRecognitionActivity ();

}

}

Private void startVoiceRecognitionActivity ()

{

// delivery of speech recognition patterns via intents

Intent Intent = new Intent(recognizerint.action_recognize_speech);
// language patterns and free-form speech recognition

Intent. PutExtra (RecognizerIntent EXTRA_LANGUAGE_MODEL,
RecognizerIntent. LANGUAGE_MODEL_FREE_FORM);

// prompt voice to begin

Intent. PutExtra (RecognizerIntent EXTRA_PROMPT,
"Please name the website you want to open.");

// start performing our Intent, voice recognition

StartActivityForResult (intent, VOICE_RECOGNITION_REQUEST_CODE);

}

// the callback function onActivityResult when the voice ends

@ Override
Protected void onActivityResult(int requestCode, int resultCode, Intent data)

{

If (requestCode = = VOICE_RECOGNITION_REQUEST_CODE
&& the resultCode = = RESULT_OK)

{

// gets the character of speech

ArrayList < String > matches = data
GetStringArrayListExtra (RecognizerIntent. EXTRA_RESULTS);

MList. SetAdapter (new ArrayAdapter < String > (this,
Android. R.l ayout simple_list_item_1, matches));

}

Super. OnActivityResult (requestCode, the resultCode, data);

}

} 

1. If the mobile phone does not support voice search, you need to download Google's Voice Search toolkit voice_search_2.1.4.apk, which can be downloaded from hiapk.com or other app stores.

2. Download the source code: demo.voice_recognition.rar. Because csdn does not allow attachments to be uploaded, right-click the connection and select "connect to". Download and change the name to "demo.voice_recognition.rar.