Android 轻松实现语音识别详解及实例代码

package com.example.test;import android.app.Activity;import android.content.Intent;import android.content.pm.PackageManager;import android.os.Bundle;import android.speech.RecognizerIntent;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;import android.widget.Toast;import java.util.ArrayList;import java.util.List;public class MainActivity extends Activity implements OnClickListener { private static final int VOICE_RECOGNITION_REQUEST_CODE = 1234; @Override public void onCreate(Bundle savedInstanceState) {  super.onCreate(savedInstanceState);  setContentView(R.layout.activity_main);  Button btn = (Button) findViewById(R.id.btn); // 识别按钮  PackageManager pm = getPackageManager();  List activities = pm.queryIntentActivities(new Intent(    RecognizerIntent.ACTION_RECOGNIZE_SPEECH), 0); // 本地识别程序  // new Intent(RecognizerIntent.ACTION_WEB_SEARCH), 0); // 网络识别程序    /*   * 此处没有使用捕捉异常，而是检测是否有语音识别程序。   * 也可以在startRecognizerActivity()方法中捕捉ActivityNotFoundException异常   */  if (activities.size() != 0) {   btn.setOnClickListener(this);  } else {   // 若检测不到语音识别程序在本机安装，测将扭铵置灰   btn.setEnabled(false);   btn.setText("未检测到语音识别设备");  } } public void onClick(View v) {  if (v.getId() == R.id.btn) {   startRecognizerActivity();  } } // 开始识别 private void startRecognizerActivity() {   // 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);  // 调出识别界面 } @Override protected void onActivityResult(int requestCode, int resultCode, Intent data) {  // 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 += results.get(i);   }   Toast.makeText(this, resultString, Toast.LENGTH_SHORT).show();  }  // 语音识别后的回调，将识别的字串以Toast显示  super.onActivityResult(requestCode, resultCode, data); }}