蘋果的iphone 有語音識別用的是Google 的技術,做為Google 力推的Android 自然會將其核心技術往Android 系統裡面植入,並結合google 的雲端技術將其發揚光大。
所以Google Voice Recognition在Android 的實現就變得極其輕松。
語音識別,借助於雲端技術可以識別用戶的語音輸入,包括語音控制等技術,下面我們將利用Google 提供的Api 實現這一功能。
功能點為:通過用戶語音將用戶輸入的語音識別出來,並打印在列表上。
功能界面如下:
用戶通過點擊speak按鈕顯示界面:
用戶說完話後,將提交到雲端搜索:
在雲端搜索完成後,返回打印數據:
Android 輕松實現語音識別的完整代碼
Java代碼
- * Copyright (C) 2008 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
- package com.example.android.apis.app;
-
- import com.example.android.apis.R;
-
- 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 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);
-
- // Inflate our UI from its XML layout description.
- setContentView(R.layout.voice_recognition);
-
- // Get display items for later interaction
- 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 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.btn_speak) {
- 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 matches = data.getStringArrayListExtra(
- RecognizerIntent.EXTRA_RESULTS);
- mList.setAdapter(new ArrayAdapter(this, android.R.layout.simple_list_item_1,
- matches));
- }
-
- super.onActivityResult(requestCode, resultCode, data);
- }
- }