Android 语音识别接口

Android 语音识别接口代码：package com.VoiceRecognition;
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;

public class VoiceRecognition 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）;

        setContentView（R.layout.main）;

        Button speakButton = （Button） findViewById（R.id.btn_speak）;

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

        // 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"）;
        }
    }

    public void onClick（View v）
    {
        if （v.getId（） == R.id.btn_speak）
        {
            startVoiceRecognitionActivity（）;
        }
    }

    private void startVoiceRecognitionActivity（）
    {
        //通过Intent传递语音识别的模式
        Intent intent = new Intent（RecognizerIntent.ACTION_RECOGNIZE_SPEECH）;
        //语言模式和自由形式的语音识别
        intent.putExtra（RecognizerIntent.EXTRA_LANGUAGE_MODEL, RecognizerIntent.LANGUAGE_MODEL_FREE_FORM）;
        //提示语音开始
        intent.putExtra（RecognizerIntent.EXTRA_PROMPT, "Speech recognition demo"）;
        //开始执行我们的Intent、语音识别
        startActivityForResult（intent, VOICE_RECOGNITION_REQUEST_CODE）;
    }

    //当语音结束时的回调函数onActivityResult
    @Override
    protected void onActivityResult（int requestCode, int resultCode, Intent data）
    {
        if （requestCode == VOICE_RECOGNITION_REQUEST_CODE && resultCode == RESULT_OK）
        {
            // 取得语音的字符
            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）;
    }
} xml文件如下：<？xml version="1.0" encoding="utf-8"？>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    >
<Button
android:id="@+id/btn_speak"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    />
    <ListView
    android:id="@+id/list"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    />
</LinearLayout> 之前以为语音识别特别难，做了之后才发现原来这简单.