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 17 package com.android.server.twilight; 18 19 import android.annotation.NonNull; 20 import android.os.Handler; 21 22 /** 23 * This class provides sunrise/sunset information based on the device's current location. 24 */ 25 public interface TwilightManager { 26 /** 27 * Register a listener to be notified whenever the twilight state changes. 28 * 29 * @param listener the {@link TwilightListener} to be notified 30 * @param handler the {@link Handler} to use to notify the listener 31 */ registerListener(@onNull TwilightListener listener, @NonNull Handler handler)32 void registerListener(@NonNull TwilightListener listener, @NonNull Handler handler); 33 34 /** 35 * Unregisters a previously registered listener. 36 * 37 * @param listener the {@link TwilightListener} to be unregistered 38 */ unregisterListener(@onNull TwilightListener listener)39 void unregisterListener(@NonNull TwilightListener listener); 40 41 /** 42 * Returns the last {@link TwilightState}, or {@code null} if not available. 43 */ getLastTwilightState()44 TwilightState getLastTwilightState(); 45 } 46