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); // 識(shí)別按鈕
  PackageManager pm = getPackageManager();
  List activities = pm.queryIntentActivities(new Intent(
    RecognizerIntent.ACTION_RECOGNIZE_SPEECH), 0); // 本地識(shí)別程序
  // new Intent(RecognizerIntent.ACTION_WEB_SEARCH), 0); // 網(wǎng)絡(luò)識(shí)別程序
  
  /*
   * 此處沒(méi)有使用捕捉異常，而是檢測(cè)是否有語(yǔ)音識(shí)別程序。
   * 也可以在startRecognizerActivity()方法中捕捉ActivityNotFoundException異常
   */
  if (activities.size() != 0) {
   btn.setOnClickListener(this);
  } else {
   // 若檢測(cè)不到語(yǔ)音識(shí)別程序在本機(jī)安裝，測(cè)將扭銨置灰
   btn.setEnabled(false);
   btn.setText("未檢測(cè)到語(yǔ)音識(shí)別設(shè)備");
  }
 }

 public void onClick(View v) {
  if (v.getId() == R.id.btn) {
   startRecognizerActivity();
  }
 }
 // 開(kāi)始識(shí)別
 private void startRecognizerActivity() { 
  // 通過(guò)Intent傳遞語(yǔ)音識(shí)別的模式，開(kāi)啟語(yǔ)音
  Intent intent = new Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH);
  // 語(yǔ)言模式和自由模式的語(yǔ)音識(shí)別
  intent.putExtra(RecognizerIntent.EXTRA_LANGUAGE_MODEL,
    RecognizerIntent.LANGUAGE_MODEL_FREE_FORM);
  // 提示語(yǔ)音開(kāi)始
  intent.putExtra(RecognizerIntent.EXTRA_PROMPT, "開(kāi)始語(yǔ)音");
  // 開(kāi)始語(yǔ)音識(shí)別
  startActivityForResult(intent, VOICE_RECOGNITION_REQUEST_CODE);
  // 調(diào)出識(shí)別界面
 }

 @Override
 protected void onActivityResult(int requestCode, int resultCode, Intent data) {
  // 回調(diào)獲取從谷歌得到的數(shù)據(jù)
  if (requestCode == VOICE_RECOGNITION_REQUEST_CODE
    && resultCode == RESULT_OK) {
   // 取得語(yǔ)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();
  }
  // 語(yǔ)音識(shí)別后的回調(diào)，將識(shí)別的字串以Toast顯示
  super.onActivityResult(requestCode, resultCode, data);
 }
}