Androidで音声認識を実現

アップルのiphoneには音声認識用のGoogleの技術があり、Googleが力を入れているAndroidは自然にその核心技術をAndroidシステムに植え込み、googleのクラウド技術と結びつけて大きく発展させる.だからGoogle Voice RecognitionはAndroidでの実現が極めて楽になった.
音声認識は,クラウド技術によりユーザの音声入力を認識することができ,音声制御などの技術を含め,Googleが提供するApiを用いて実現する.機能点は,ユーザの音声でユーザが入力した音声を認識し,リストに印刷することである.機能インタフェースは次のとおりです.
 
Android_speakActivity
 

package src.speek.com;

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 Android_speakActivity 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.main);

		// Get display items for later interaction
		Button speakButton = (Button) findViewById(R.id.button1);

		mList = (ListView) findViewById(R.id.list1);

		// Check to see if a recognition activity is present
		PackageManager pm = getPackageManager();
		List<ResolveInfo> 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.button1)
		{
			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<String> matches = data
					.getStringArrayListExtra(RecognizerIntent.EXTRA_RESULTS);
			mList.setAdapter(new ArrayAdapter<String>(this,
					android.R.layout.simple_list_item_1, matches));
		}

		super.onActivityResult(requestCode, resultCode, data);
	}
}

 
main.xml
 

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >

    <Button
        android:id="@+id/button1"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="    " />

    <ListView
        android:id="@+id/list1"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content" />

</LinearLayout>

 
 
Androidは音声認識DEMOダウンロードアドレスを実現する:http://download.csdn.net/detail/tt5267621/3755277