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.android.settings; 18 19 import android.preference.Preference; 20 import android.preference.PreferenceCategory; 21 import android.preference.PreferenceGroup; 22 import android.speech.tts.TtsEngines; 23 24 import com.android.settings.voice.VoiceInputHelper; 25 26 /** 27 * Settings screen for voice input/output. 28 */ 29 public class VoiceInputOutputSettings { 30 31 private static final String TAG = "VoiceInputOutputSettings"; 32 33 private static final String KEY_VOICE_CATEGORY = "voice_category"; 34 private static final String KEY_TTS_SETTINGS = "tts_settings"; 35 36 private PreferenceGroup mParent; 37 private PreferenceCategory mVoiceCategory; 38 private Preference mVoiceInputSettingsPref; 39 private Preference mTtsSettingsPref; 40 private final SettingsPreferenceFragment mFragment; 41 private final TtsEngines mTtsEngines; 42 VoiceInputOutputSettings(SettingsPreferenceFragment fragment)43 public VoiceInputOutputSettings(SettingsPreferenceFragment fragment) { 44 mFragment = fragment; 45 mTtsEngines = new TtsEngines(fragment.getPreferenceScreen().getContext()); 46 } 47 onCreate()48 public void onCreate() { 49 mParent = mFragment.getPreferenceScreen(); 50 mVoiceCategory = (PreferenceCategory) mParent.findPreference(KEY_VOICE_CATEGORY); 51 mTtsSettingsPref = mVoiceCategory.findPreference(KEY_TTS_SETTINGS); 52 53 populateOrRemovePreferences(); 54 } 55 populateOrRemovePreferences()56 private void populateOrRemovePreferences() { 57 boolean hasTtsPrefs = populateOrRemoveTtsPrefs(); 58 if (!hasTtsPrefs) { 59 // There were no TTS settings and no recognizer settings, 60 // so it should be safe to hide the preference category 61 // entirely. 62 mFragment.getPreferenceScreen().removePreference(mVoiceCategory); 63 } 64 } 65 populateOrRemoveTtsPrefs()66 private boolean populateOrRemoveTtsPrefs() { 67 if (mTtsEngines.getEngines().isEmpty()) { 68 mVoiceCategory.removePreference(mTtsSettingsPref); 69 return false; 70 } 71 72 return true; 73 } 74 } 75