1 /* 2 * Copyright (C) 2006 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 * Extended {@link Adapter} that is the bridge between a {@link ListView} 21 * and the data that backs the list. Frequently that data comes from a Cursor, 22 * but that is not 23 * required. The ListView can display any data provided that it is wrapped in a 24 * ListAdapter. 25 */ 26 public interface ListAdapter extends Adapter { 27 28 /** 29 * Indicates whether all the items in this adapter are enabled. If the 30 * value returned by this method changes over time, there is no guarantee 31 * it will take effect. If true, it means all items are selectable and 32 * clickable (there is no separator.) 33 * 34 * @return True if all items are enabled, false otherwise. 35 * 36 * @see #isEnabled(int) 37 */ 38 public boolean areAllItemsEnabled(); 39 40 /** 41 * Returns true if the item at the specified position is not a separator. 42 * (A separator is a non-selectable, non-clickable item). 43 * 44 * The result is unspecified if position is invalid. An {@link ArrayIndexOutOfBoundsException} 45 * should be thrown in that case for fast failure. 46 * 47 * @param position Index of the item 48 * 49 * @return True if the item is not a separator 50 * 51 * @see #areAllItemsEnabled() 52 */ 53 boolean isEnabled(int position); 54 } 55
