1 /*
2  * Copyright (C) 2010 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 android.widget;
18 
19 /**
20  * This interface can be implemented by any collection-type view which has a notion of
21  * progressing through its set of children. The interface exists to give AppWidgetHosts a way of
22  * taking responsibility for automatically advancing such collections.
23  *
24  */
25 public interface Advanceable {
26 
27     /**
28      * Advances this collection, eg. shows the next view.
29      */
advance()30     public void advance();
31 
32     /**
33      * Called by the AppWidgetHost once before it begins to call advance(), allowing the
34      * collection to do any required setup.
35      */
fyiWillBeAdvancedByHostKThx()36     public void fyiWillBeAdvancedByHostKThx();
37 }
38