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      1 /*
      2  * Copyright (C) 2014 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 com.android.server;
     18 
     19 import java.util.List;
     20 
     21 /**
     22  * Shim to allow core/backup to communicate with the app widget service
     23  * about various important events without needing to be able to see the
     24  * implementation of the service.
     25  *
     26  * @hide
     27  */
     28 public interface WidgetBackupProvider {
     29     public List<String> getWidgetParticipants(int userId);
     30     public byte[] getWidgetState(String packageName, int userId);
     31     public void restoreStarting(int userId);
     32     public void restoreWidgetState(String packageName, byte[] restoredState, int userId);
     33     public void restoreFinished(int userId);
     34 }
     35