1 /* 2 * Copyright (C) 2016 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 package com.android.emergency; 17 18 /** 19 * Provides common methods to be called when reloading a preference. 20 */ 21 public interface ReloadablePreferenceInterface { 22 23 /** Reloads the value from the preference and updates the summary with that value. */ reloadFromPreference()24 void reloadFromPreference(); 25 26 /** 27 * Returns whether the persisted string is empty or set to the default value, i.e. the user 28 * didn't set it. 29 */ isNotSet()30 boolean isNotSet(); 31 } 32