1 /* 2 * Copyright (C) 2015 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.messaging.ui; 17 18 import android.os.Parcelable; 19 20 /** 21 * Wraps around functionality to save, restore and reset a particular UI component's state. 22 */ 23 public interface PersistentInstanceState { 24 /** 25 * Saves necessary information about the current state of the instance to later restore 26 * the instance to its original state. 27 */ 28 Parcelable saveState(); 29 30 /** 31 * Given a previously saved instance state, attempt to restore to its original view state. 32 */ 33 void restoreState(Parcelable restoredState); 34 35 /** 36 * Called when any current/preserved state should be reset to zero state. 37 */ 38 void resetState(); 39 } 40
