content: /*
   * Copyright 2016 Google Inc. All Rights Reserved.
   *
   * 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 com.google.samples.apps.ourstreets.fragment;
  
  import com.google.samples.apps.ourstreets.activity.MainActivity;
  
  /**
   * Enables fragments to listen to {@link MainActivity#onBackPressed()}.
   * Fragments implementing BackStackAware must pop themselves of the back stack
   * after they're finished with their work.
   */
  public interface BackPressAware {
  
      /**
       * Called when back is pressed.
       */
      void onBackPressed();
  }
  