语音识别技术

Android由于有了Google的支持，那么他的语音识别做起来也是比较简单的，主要是调用谷歌的语音识别软件，然后取得他的返回值，谷歌的语音识别有着极其庞大的云中心以及数据库。当然语音识别是存在一个精度问题的，所以谷歌语音识别软件的返回值不是唯一的，因此到时候需要自己做筛选或者处理：package com.ichances.voice;

import java.util.ArrayList;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.speech.RecognizerIntent;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;

public class VoiceActivity extends Activity {
    /** Called when the activity is first created. */
    private Button btnReconizer;
    private static final int VOICE_RECOGNITION_REQUEST_CODE =618;
    private TextView resText;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        // TODO Auto-generated method stub
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        btnReconizer = (Button) this.findViewById(R.id.button1);
        resText = (TextView) findViewById(R.id.restext);
        btnReconizer.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
                // TODO Auto-generated method stub
                try {
                    // 通过Intent传递语音识别的模式，开启语音
                    Intent intent = new Intent(
                            RecognizerIntent.ACTION_RECOGNIZE_SPEECH);
                    // 语言模式和自由模式的语音识别
                    intent.putExtra(RecognizerIntent.EXTRA_LANGUAGE_MODEL,
                            RecognizerIntent.LANGUAGE_MODEL_FREE_FORM);
                    // 提示语音开始
                    intent.putExtra(RecognizerIntent.EXTRA_PROMPT, "开始语音");
                    // 开始语音识别
                    startActivityForResult(intent,
                            VOICE_RECOGNITION_REQUEST_CODE);
                } catch (Exception e) {
                    // TODO: handle exception
                    e.printStackTrace();
                    Toast.makeText(getApplicationContext(), "找不到语音设备", 1)
                            .show();
                }
            }
        });
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        // TODO Auto-generated method stub
        // 回调获取从谷歌得到的数据
        if (requestCode == VOICE_RECOGNITION_REQUEST_CODE
                && resultCode == RESULT_OK) {
            // 取得语音的字符
            ArrayList<String> results = data
                    .getStringArrayListExtra(RecognizerIntent.EXTRA_RESULTS);
            String resultString = "";
            for (int i = 0; i < results.size(); i++) {
                resultString += String.valueOf(i + 1) + ":" + results.get(i)
                        + ";";
                Log.i("结果", resultString);
            }
            resText.setText(resultString);
            Toast.makeText(this, resultString, 1).show();
        }
        super.onActivityResult(requestCode, resultCode, data);
    }
}