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 package android.app;
17 
18 /**
19  * Listens to VR Mode state changes. Use with methods in {@link VrManager}.
20  *
21  * @hide
22  */
23 public abstract class VrStateCallback {
24 
25     /**
26      * Callback triggered when there is a change to Persistent VR State.
27      *
28      * @param enabled True when VR State is in persistent mode, false otherwise.
29      */
onPersistentVrStateChanged(boolean enabled)30     public void onPersistentVrStateChanged(boolean enabled) {}
31 
32     /**
33      * Callback triggered when there is a change to Vr State.
34      *
35      * @param enabled True when VR State is in VR mode, false otherwise.
36      */
onVrStateChanged(boolean enabled)37     public void onVrStateChanged(boolean enabled) {}
38 }
39