1 /* 2 * Copyright (C) 2010 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.example.android.voicerecognitionservice; 18 19 import java.util.ArrayList; 20 21 import android.content.Context; 22 import android.content.Intent; 23 import android.content.SharedPreferences; 24 import android.os.Bundle; 25 import android.os.RemoteException; 26 import android.speech.SpeechRecognizer; 27 import android.speech.RecognitionService; 28 29 /** 30 * A sample implementation of a {@link RecognitionService}. This very simple implementation does 31 * no actual voice recognition. It just immediately returns fake recognition results. 32 * Depending on the setting chosen in {@link VoiceRecognitionSettings}, it either returns a 33 * list of letters ("a", "b", "c"), or a list of numbers ("1", "2", "3"). 34 */ 35 public class VoiceRecognitionService extends RecognitionService { 36 37 @Override 38 protected void onCancel(Callback listener) { 39 // A real recognizer would do something to shut down recognition here. 40 } 41 42 @Override 43 protected void onStartListening(Intent recognizerIntent, Callback listener) { 44 // A real recognizer would probably utilize a lot of the other listener callback 45 // methods. But we'll just skip all that and pretend we've got a result. 46 ArrayList<String> results = new ArrayList<String>(); 47 48 SharedPreferences prefs = getSharedPreferences( 49 VoiceRecognitionSettings.SHARED_PREFERENCES_NAME, 50 Context.MODE_PRIVATE); 51 52 String resultType = prefs.getString( 53 VoiceRecognitionSettings.PREF_KEY_RESULTS_TYPE, 54 String.valueOf(VoiceRecognitionSettings.RESULT_TYPE_LETTERS)); 55 int resultTypeInt = Integer.parseInt(resultType); 56 57 if (resultTypeInt == VoiceRecognitionSettings.RESULT_TYPE_LETTERS) { 58 results.add("a"); 59 results.add("b"); 60 results.add("c"); 61 } else if (resultTypeInt == VoiceRecognitionSettings.RESULT_TYPE_NUMBERS) { 62 results.add("1"); 63 results.add("2"); 64 results.add("3"); 65 } 66 67 Bundle bundle = new Bundle(); 68 bundle.putStringArrayList(SpeechRecognizer.RESULTS_RECOGNITION, results); 69 70 try { 71 listener.results(bundle); 72 } catch (RemoteException e) { 73 throw new RuntimeException(e); 74 } 75 } 76 77 @Override 78 protected void onStopListening(Callback listener) { 79 // Not implemented - in this sample we assume recognition would be endpointed 80 // automatically, though certain applications may wish to expose an affordance 81 // for stopping recording manually. 82 } 83 84 } 85
