Java tutorial
/** * The MIT License * * Copyright (c) 2011-2013 * Colin Turner (github.com/koolspin) * Guillaume Charhon (github.com/poiuytrez) * * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. * * */ package com.phonegap.plugins.speech; import java.util.ArrayList; import java.util.Locale; import org.json.JSONArray; import org.json.JSONException; import org.json.JSONObject; import org.apache.cordova.CallbackContext; import org.apache.cordova.CordovaPlugin; import org.apache.cordova.PluginResult; import org.apache.cordova.LOG; import android.util.Log; import android.app.Activity; import android.content.Intent; import android.speech.RecognitionListener; import android.speech.RecognizerIntent; import android.speech.SpeechRecognizer; import android.os.Bundle; import android.os.Handler; import android.os.Looper; public class XSpeechRecognizer extends CordovaPlugin { private static final String TAG = XSpeechRecognizer.class.getSimpleName(); private static int REQUEST_CODE = 1001; public static final String ACTION_INIT = "init"; public static final String ACTION_SPEECH_RECOGNIZE_START = "start"; public static final String ACTION_SPEECH_RECOGNIZE_STOP = "stop"; public static final String ACTION_SPEECH_RECOGNIZE_ABORT = "abort"; public static final String ACTION_GET_SUPPORTED_LANGUAGES = "getSupportedLanguages"; public static final String NOT_PRESENT_MESSAGE = "Speech recognition is not present or enabled"; private CallbackContext callbackContext; private LanguageDetailsChecker languageDetailsChecker; private SpeechRecognizer recognizer; public boolean execute(String action, JSONArray args, CallbackContext callbackContext) { this.callbackContext = callbackContext; Boolean isValidAction = true; if (ACTION_SPEECH_RECOGNIZE_START.equals(action)) { Handler loopHandler = new Handler(Looper.getMainLooper()); loopHandler.post(new Runnable() { @Override public void run() { recognizer = SpeechRecognizer.createSpeechRecognizer(cordova.getActivity().getBaseContext()); recognizer.setRecognitionListener(new listener()); } }); startSpeechRecognitionActivity(args); } else if (ACTION_GET_SUPPORTED_LANGUAGES.equals(action)) { getSupportedLanguages(); } else if (ACTION_SPEECH_RECOGNIZE_STOP.equals(action)) { stopSpeechRecognitionActivity(); } else { this.callbackContext.error("Unknown action: " + action); isValidAction = false; } return isValidAction; } private void fireRecognitionEvent(ArrayList<String> transcripts, float[] confidences) { JSONObject event = new JSONObject(); JSONArray results = new JSONArray(); try { for (int i = 0; i < transcripts.size(); i++) { JSONArray alternatives = new JSONArray(); JSONObject result = new JSONObject(); result.put("transcript", transcripts.get(i)); result.put("final", true); if (confidences != null) { result.put("confidence", confidences[i]); } alternatives.put(result); results.put(alternatives); } event.put("type", "result"); // event.put("emma", null); // event.put("interpretation", null); event.put("results", results); } catch (JSONException e) { // this will never happen } PluginResult pr = new PluginResult(PluginResult.Status.OK, event); pr.setKeepCallback(true); this.callbackContext.sendPluginResult(pr); } private void fireErrorEvent(Integer code) { JSONObject event = new JSONObject(); try { event.put("type", "error"); event.put("code", code.toString()); } catch (JSONException e) { // this will never happen } PluginResult pr = new PluginResult(PluginResult.Status.ERROR, event); pr.setKeepCallback(false); this.callbackContext.sendPluginResult(pr); } private void fireEvent(String type) { // callbackContext.sendPluginResult(new PluginResult(PluginResult.Status.OK, "Event")); JSONObject event = new JSONObject(); try { event.put("type", type); } catch (JSONException e) { // this will never happen } // PluginResult pr = new PluginResult(PluginResult.Status.OK, "event"); PluginResult pr = new PluginResult(PluginResult.Status.OK, event); pr.setKeepCallback(true); this.callbackContext.sendPluginResult(pr); } private void stopSpeechRecognitionActivity() { Handler loopHandler = new Handler(Looper.getMainLooper()); loopHandler.post(new Runnable() { @Override public void run() { recognizer.stopListening(); // recognizer.cancel(); } }); } /** * Fire an intent to start the speech recognition activity. * * @param args Argument array with the following string args: [req code][number of matches] */ private void startSpeechRecognitionActivity(JSONArray args) { int maxMatches = 0; String language = Locale.getDefault().toString(); try { if (args.length() > 0) { // Maximum number of matches, 0 means the recognizer decides String temp = args.getString(0); maxMatches = Integer.parseInt(temp); } if (args.length() > 1) { // Language language = args.getString(1); } } catch (Exception e) { Log.e(TAG, String.format("startSpeechRecognitionActivity exception: %s", e.toString())); } // Create the intent and set parameters final Intent intent = new Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH); intent.putExtra(RecognizerIntent.EXTRA_LANGUAGE_MODEL, RecognizerIntent.LANGUAGE_MODEL_FREE_FORM); // intent.putExtra(RecognizerIntent.EXTRA_CALLING_PACKAGE,"voice.recognition.test"); intent.putExtra(RecognizerIntent.EXTRA_LANGUAGE, language); if (maxMatches > 0) intent.putExtra(RecognizerIntent.EXTRA_MAX_RESULTS, maxMatches); Handler loopHandler = new Handler(Looper.getMainLooper()); loopHandler.post(new Runnable() { @Override public void run() { recognizer.startListening(intent); } }); } /* * Get the list of supported languages */ private void getSupportedLanguages() { if (languageDetailsChecker == null) { languageDetailsChecker = new LanguageDetailsChecker(callbackContext); } Intent detailsIntent = new Intent(RecognizerIntent.ACTION_GET_LANGUAGE_DETAILS); cordova.getActivity().sendOrderedBroadcast(detailsIntent, null, languageDetailsChecker, null, Activity.RESULT_OK, null, null); } class listener implements RecognitionListener { public void onReadyForSpeech(Bundle params) { fireEvent("ready"); Log.d(TAG, "onReadyForSpeech"); } public void onBeginningOfSpeech() { fireEvent("start"); Log.d(TAG, "onBeginningOfSpeech"); } /* RMV Voltage */ public void onRmsChanged(float rmsdB) { // fireEvent("rms changed"); Log.d(TAG, "onRmsChanged"); } public void onBufferReceived(byte[] buffer) { fireEvent("buffer received"); Log.d(TAG, "onBufferReceived"); } public void onEndOfSpeech() { fireEvent("end"); Log.d(TAG, "onEndofSpeech"); } public void onError(int error) { fireErrorEvent(error); Log.d(TAG, "error " + error); } public void onResults(Bundle results) { String str = new String(); Log.d(TAG, "onResults " + results); ArrayList<String> transcript = results.getStringArrayList(SpeechRecognizer.RESULTS_RECOGNITION); float[] confidence = results.getFloatArray(SpeechRecognizer.CONFIDENCE_SCORES); if (transcript.size() > 0) { Log.d(TAG, "fire recognition event"); fireRecognitionEvent(transcript, confidence); } else { Log.d(TAG, "fire no match event"); fireEvent("nomatch"); } } public void onPartialResults(Bundle partialResults) { fireEvent("partial results"); Log.d(TAG, "onPartialResults"); } public void onEvent(int eventType, Bundle params) { fireEvent("event"); Log.d(TAG, "onEvent " + eventType); } } }