| /* |
| * Copyright (C) 2017 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package androidx.car.widget; |
| |
| import static java.lang.annotation.RetentionPolicy.SOURCE; |
| |
| import androidx.annotation.IntDef; |
| |
| import java.lang.annotation.Retention; |
| |
| /** |
| * Specifies how the system UI should respond to day/night mode events. |
| * |
| * <p>By default, the Android Auto system UI assumes the app content background is light during the |
| * day and dark during the night. The system UI updates the foreground color (such as status bar |
| * icon colors) to be dark during day mode and light during night mode. By setting the |
| * DayNightStyle, the app can specify how the system should respond to a day/night mode event. For |
| * example, if the app has a dark content background for both day and night time, the app can tell |
| * the system to use {@link #FORCE_NIGHT} style so the foreground color is locked to light color for |
| * both cases. |
| * |
| * <p>Note: Not all system UI elements can be customized with a DayNightStyle. |
| */ |
| @IntDef({ |
| DayNightStyle.AUTO, |
| DayNightStyle.AUTO_INVERSE, |
| DayNightStyle.FORCE_NIGHT, |
| DayNightStyle.FORCE_DAY, |
| }) |
| @Retention(SOURCE) |
| public @interface DayNightStyle { |
| /** |
| * Sets the foreground color to be automatically changed based on day/night mode, assuming the |
| * app content background is light during the day and dark during the night. |
| * |
| * <p>This is the default behavior. |
| */ |
| int AUTO = 0; |
| |
| /** |
| * Sets the foreground color to be automatically changed based on day/night mode, assuming the |
| * app content background is dark during the day and light during the night. |
| */ |
| int AUTO_INVERSE = 1; |
| |
| /** |
| * Sets the foreground color to be locked to the night version, which assumes the app content |
| * background is always dark during both day and night. |
| */ |
| int FORCE_NIGHT = 2; |
| |
| /** |
| * Sets the foreground color to be locked to the day version, which assumes the app content |
| * background is always light during both day and night. |
| */ |
| int FORCE_DAY = 3; |
| } |