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_VOICE_INPUT_SETTINGS = "voice_input_settings"; 35 private static final String KEY_TTS_SETTINGS = "tts_settings"; 36 37 private PreferenceGroup mParent; 38 private PreferenceCategory mVoiceCategory; 39 private Preference mVoiceInputSettingsPref; 40 private Preference mTtsSettingsPref; 41 private final SettingsPreferenceFragment mFragment; 42 private final TtsEngines mTtsEngines; 43 VoiceInputOutputSettings(SettingsPreferenceFragment fragment)44 public VoiceInputOutputSettings(SettingsPreferenceFragment fragment) { 45 mFragment = fragment; 46 mTtsEngines = new TtsEngines(fragment.getPreferenceScreen().getContext()); 47 } 48 onCreate()49 public void onCreate() { 50 51 mParent = mFragment.getPreferenceScreen(); 52 mVoiceCategory = (PreferenceCategory) mParent.findPreference(KEY_VOICE_CATEGORY); 53 mVoiceInputSettingsPref = mVoiceCategory.findPreference(KEY_VOICE_INPUT_SETTINGS); 54 mTtsSettingsPref = mVoiceCategory.findPreference(KEY_TTS_SETTINGS); 55 56 populateOrRemovePreferences(); 57 } 58 populateOrRemovePreferences()59 private void populateOrRemovePreferences() { 60 boolean hasVoiceInputPrefs = populateOrRemoveVoiceInputPrefs(); 61 boolean hasTtsPrefs = populateOrRemoveTtsPrefs(); 62 if (!hasVoiceInputPrefs && !hasTtsPrefs) { 63 // There were no TTS settings and no recognizer settings, 64 // so it should be safe to hide the preference category 65 // entirely. 66 mFragment.getPreferenceScreen().removePreference(mVoiceCategory); 67 } 68 } 69 populateOrRemoveVoiceInputPrefs()70 private boolean populateOrRemoveVoiceInputPrefs() { 71 VoiceInputHelper helper = new VoiceInputHelper(mFragment.getActivity()); 72 if (!helper.hasItems()) { 73 mVoiceCategory.removePreference(mVoiceInputSettingsPref); 74 return false; 75 } 76 77 return true; 78 } 79 populateOrRemoveTtsPrefs()80 private boolean populateOrRemoveTtsPrefs() { 81 if (mTtsEngines.getEngines().isEmpty()) { 82 mVoiceCategory.removePreference(mTtsSettingsPref); 83 return false; 84 } 85 86 return true; 87 } 88 } 89