1 /* 2 * Copyright (C) 2014 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.camera.settings; 18 19 import android.app.Activity; 20 import android.app.Application; 21 import android.content.Context; 22 import android.preference.SwitchPreference; 23 import android.util.AttributeSet; 24 25 import com.android.camera.app.CameraApp; 26 import com.android.camera.app.CameraServicesImpl; 27 28 /** 29 * This class allows Settings UIs to display and set boolean values controlled 30 * via the {@link SettingManager}. The Default {@link SwitchPreference} uses 31 * {@link android.content.SharedPreferences} as a backing store; since the 32 * {@link SettingManager} stores all settings as Strings we need to ensure we 33 * get and set boolean settings through the manager. 34 */ 35 public class ManagedSwitchPreference extends SwitchPreference { 36 public ManagedSwitchPreference(Context context) { 37 super(context); 38 } 39 40 public ManagedSwitchPreference(Context context, AttributeSet attrs) { 41 super(context, attrs); 42 } 43 44 public ManagedSwitchPreference(Context context, AttributeSet attrs, int defStyle) { 45 super(context, attrs, defStyle); 46 } 47 48 @Override 49 public boolean getPersistedBoolean(boolean defaultReturnValue) { 50 CameraApp cameraApp = getCameraApp(); 51 if (cameraApp == null) { 52 // The context and app may not be initialized upon initial inflation of the 53 // preference from XML. In that case return the default value. 54 return defaultReturnValue; 55 } 56 SettingsManager settingsManager = CameraServicesImpl.instance().getSettingsManager(); 57 if (settingsManager != null) { 58 return settingsManager.getBoolean(SettingsManager.SCOPE_GLOBAL, getKey()); 59 } else { 60 // If the SettingsManager is for some reason not initialized, 61 // perhaps triggered by a monkey, return default value. 62 return defaultReturnValue; 63 } 64 } 65 66 @Override 67 public boolean persistBoolean(boolean value) { 68 CameraApp cameraApp = getCameraApp(); 69 if (cameraApp == null) { 70 // The context may not be initialized upon initial inflation of the 71 // preference from XML. In that case return false to note the value won't 72 // be persisted. 73 return false; 74 } 75 SettingsManager settingsManager = CameraServicesImpl.instance().getSettingsManager(); 76 if (settingsManager != null) { 77 settingsManager.set(SettingsManager.SCOPE_GLOBAL, getKey(), value); 78 return true; 79 } else { 80 // If the SettingsManager is for some reason not initialized, 81 // perhaps triggered by a monkey, return false to note the value 82 // was not persisted. 83 return false; 84 } 85 } 86 87 private CameraApp getCameraApp() { 88 Context context = getContext(); 89 if (context instanceof Activity) { 90 Application application = ((Activity) context).getApplication(); 91 if (application instanceof CameraApp) { 92 return (CameraApp) application; 93 } 94 } 95 return null; 96 } 97 } 98
