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 import android.annotation.SystemApi; 19 20 /** 21 * Listens to VR Mode state changes. Use with methods in {@link VrManager}. 22 * 23 * @hide 24 */ 25 @SystemApi 26 public abstract class VrStateCallback { 27 28 /** 29 * Callback triggered when there is a change to Persistent VR State. 30 * 31 * @param enabled True when VR State is in persistent mode, false otherwise. 32 */ 33 public void onPersistentVrStateChanged(boolean enabled) {} 34 35 /** 36 * Callback triggered when there is a change to Vr State. 37 * 38 * @param enabled True when VR State is in VR mode, false otherwise. 39 */ 40 public void onVrStateChanged(boolean enabled) {} 41 } 42
