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 * @hide 25 */ 26 public interface Advanceable { 27 28 /** 29 * Advances this collection, eg. shows the next view. 30 */ 31 public void advance(); 32 33 /** 34 * Called by the AppWidgetHost once before it begins to call advance(), allowing the 35 * collection to do any required setup. 36 */ 37 public void fyiWillBeAdvancedByHostKThx(); 38 } 39
