1 /* 2 * Copyright (C) 2017 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 androidx.lifecycle; 18 19 import androidx.annotation.NonNull; 20 21 /** 22 * A class that has an Android lifecycle. These events can be used by custom components to 23 * handle lifecycle changes without implementing any code inside the Activity or the Fragment. 24 * 25 * @see Lifecycle 26 */ 27 @SuppressWarnings({"WeakerAccess", "unused"}) 28 public interface LifecycleOwner { 29 /** 30 * Returns the Lifecycle of the provider. 31 * 32 * @return The lifecycle of the provider. 33 */ 34 @NonNull 35 Lifecycle getLifecycle(); 36 } 37