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
17package 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 */
26public 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