content: /*
   * 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 android.app;
  
  import android.annotation.SystemApi;
  
  /**
   * Listens to VR Mode state changes. Use with methods in {@link VrManager}.
   *
   * @hide
   */
  @SystemApi
  public abstract class VrStateCallback {
  
      /**
       * Callback triggered when there is a change to Persistent VR State.
       *
       * @param enabled True when VR State is in persistent mode, false otherwise.
       */
      public void onPersistentVrStateChanged(boolean enabled) {}
  
      /**
       * Callback triggered when there is a change to Vr State.
       *
       * @param enabled True when VR State is in VR mode, false otherwise.
       */
      public void onVrStateChanged(boolean enabled) {}
  }
  