1 /*
2  * Copyright (C) 2012 Google Inc.
3  * Licensed to The Android Open Source Project.
4  *
5  * Licensed under the Apache License, Version 2.0 (the "License");
6  * you may not use this file except in compliance with the License.
7  * You may obtain a copy of the License at
8  *
9  *      http://www.apache.org/licenses/LICENSE-2.0
10  *
11  * Unless required by applicable law or agreed to in writing, software
12  * distributed under the License is distributed on an "AS IS" BASIS,
13  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14  * See the License for the specific language governing permissions and
15  * limitations under the License.
16  */
17 
18 package com.android.mail.ui;
19 
20 import android.database.DataSetObserver;
21 
22 import com.android.mail.providers.RecentFolderObserver;
23 
24 /**
25  * Controller that can provide recent folders and notify on changes to recent folders.
26  */
27 public interface RecentFolderController {
28     /**
29      * Registers to receive changes to the recent folders, and obtains the current recent folders.
30      */
registerRecentFolderObserver(DataSetObserver observer)31     void registerRecentFolderObserver(DataSetObserver observer);
32 
33     /**
34      * Removes a listener from receiving recent folder changes.
35      */
unregisterRecentFolderObserver(DataSetObserver observer)36     void unregisterRecentFolderObserver(DataSetObserver observer);
37 
38     /**
39      * Returns the current recent folders. Instead of calling this method,
40      * consider registering for account changes using
41      * {@link RecentFolderObserver#initialize(RecentFolderController)}, which not only provides the
42      * current account, but also updates to the account, in case of settings changes.
43      */
getRecentFolders()44     RecentFolderList getRecentFolders();
45 
46 }
47