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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 android.service.vr;
18 
19 import android.service.vr.IVrStateCallbacks;
20 
21 /** @hide */
22 interface IVrManager {
23 
24     /**
25      * Add a callback to be notified when VR mode state changes.
26      *
27      * @param cb the callback instance to add.
28      */
registerListener(in IVrStateCallbacks cb)29     void registerListener(in IVrStateCallbacks cb);
30 
31     /**
32      * Remove the callack from the current set of registered callbacks.
33      *
34      * @param cb the callback to remove.
35      */
unregisterListener(in IVrStateCallbacks cb)36     void unregisterListener(in IVrStateCallbacks cb);
37 
38     /**
39      * Return current VR mode state.
40      *
41      * @return {@code true} if VR mode is enabled.
42      */
getVrModeState()43     boolean getVrModeState();
44 
45 }
46 
47