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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 package android.car.app.menu;
     17 
     18 import android.os.Bundle;
     19 
     20 import java.util.List;
     21 
     22 /**
     23  * The callbacks to receive menu items updates.
     24  */
     25 public abstract class SubscriptionCallbacks {
     26     /**
     27      * Called when the items with the specified parent id are loaded.
     28      *
     29      * @param items The list of menu items. To retrieve the content of the item, use the keys
     30      *              defined in {@link CarMenuConstants.CarMenuConstants}.
     31      */
     32     public abstract void onChildrenLoaded(String parentId, List<Bundle> items);
     33 
     34     /**
     35      * Called when there is an error loading the items with the specified id.
     36      */
     37     public abstract void onError(String id);
     38 
     39     /**
     40      * Called when the car menu items with the specified parent id are changed.
     41      *
     42      * @param item The new menu item. To retrieve the content of the item, use the keys
     43      *              defined in {@link CarMenuConstants.CarMenuConstants}.
     44      */
     45     public abstract void onChildChanged(String parentId, Bundle item);
     46 }