/* * Copyright (C) 2011 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.ttsengine; import android.app.Activity; import android.content.Intent; import android.os.Bundle; import android.speech.tts.TextToSpeech; import android.text.TextUtils; import android.util.Log; import java.io.IOException; import java.io.InputStream; import java.util.ArrayList; import java.util.Arrays; import java.util.List; /* * Checks if the voice data is present. */ public class CheckVoiceData extends Activity { private static final String TAG = "CheckVoiceData"; private static final String[] SUPPORTED_LANGUAGES = { "eng-GBR", "eng-USA" }; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); Intent intent = getIntent(); List checkLanguages = getCheckVoiceDataFor(intent); // If the call didn't specify which languages to check, check // for all the supported ones. if (checkLanguages.isEmpty()) { checkLanguages = Arrays.asList(SUPPORTED_LANGUAGES); } ArrayList available = new ArrayList(); ArrayList unavailable = new ArrayList(); for (String lang : checkLanguages) { // This check is required because checkLanguages might contain // an arbitrary list of languages if the intent specified them // {@link #getCheckVoiceDataFor}. if (isLanguageSupported(lang)) { if (isDataInstalled(lang)) { available.add(lang); } else { unavailable.add(lang); } } } int result; if (!checkLanguages.isEmpty() && available.isEmpty()) { // No voices available at all. result = TextToSpeech.Engine.CHECK_VOICE_DATA_FAIL; } else if (!unavailable.isEmpty()) { // Some voices are available, but some have missing // data. result = TextToSpeech.Engine.CHECK_VOICE_DATA_MISSING_DATA; } else { // All voices are available. result = TextToSpeech.Engine.CHECK_VOICE_DATA_PASS; } // We now return the list of available and unavailable voices // as well as the return code. Intent returnData = new Intent(); returnData.putStringArrayListExtra( TextToSpeech.Engine.EXTRA_AVAILABLE_VOICES, available); returnData.putStringArrayListExtra( TextToSpeech.Engine.EXTRA_UNAVAILABLE_VOICES, unavailable); setResult(result, returnData); finish(); } /** * The intent that launches this activity can contain an intent extra * {@link TextToSpeech.Engine.EXTRA_CHECK_VOICE_DATA_FOR} that might specify * a given language to check voice data for. If the intent does not contain * this extra, we assume that a voice check for all supported languages * was requested. */ private List getCheckVoiceDataFor(Intent intent) { ArrayList list = intent.getStringArrayListExtra( TextToSpeech.Engine.EXTRA_CHECK_VOICE_DATA_FOR); ArrayList ret = new ArrayList(); if (list != null) { for (String lang : list) { if (!TextUtils.isEmpty(lang)) { ret.add(lang); } } } return ret; } /** * Checks whether a given language is in the list of supported languages. */ private boolean isLanguageSupported(String input) { for (String lang : SUPPORTED_LANGUAGES) { if (lang.equals(input)) { return true; } } return false; } /* * Note that in our example, all data is packaged in our APK as * assets (it could be a raw resource as well). This check is unnecessary * because it will always succeed. * * If for example, engine data was downloaded or installed on external storage, * this check would make much more sense. */ private boolean isDataInstalled(String lang) { try { InputStream is = getAssets().open(lang + ".freq"); if (is != null) { is.close(); } else { return false; } } catch (IOException e) { Log.w(TAG, "Unable to find data for: " + lang + ", exception: " + e); return false; } // The asset InputStream was non null, and therefore this // data file is available. return true; } }