AccessibilityNodeProviderCompatJellyBean.java revision 956b013dfda37760b0232ed6d448900a546d2903 
1/*
2 * Copyright (C) 2012 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.support.v4.view.accessibility;
18
19import android.view.accessibility.AccessibilityNodeInfo;
20import android.view.accessibility.AccessibilityNodeProvider;
21
22import java.util.List;
23
24/**
25 * JellyBean specific AccessibilityNodeProvider API implementation.
26 */
27class AccessibilityNodeProviderCompatJellyBean {
28    interface AccessibilityNodeInfoBridge {
29        public Object createAccessibilityNodeInfo(int virtualViewId);
30        public boolean performAccessibilityAction(int action, int virtualViewId);
31        public List<Object> findAccessibilityNodeInfosByText(String text,
32            int virtualViewId);
33    }
34
35    public static Object newAccessibilityNodeProviderBridge(
36            final AccessibilityNodeInfoBridge bridge) {
37        return new AccessibilityNodeProvider() {
38            @Override
39            public AccessibilityNodeInfo createAccessibilityNodeInfo(int virtualViewId) {
40                return (AccessibilityNodeInfo) bridge.createAccessibilityNodeInfo(virtualViewId);
41            }
42
43            @Override
44            @SuppressWarnings("unchecked")
45            public List<AccessibilityNodeInfo> findAccessibilityNodeInfosByText(
46                    String text, int virtualViewId) {
47                // Use some voodoo to avoid creating intermediary instances.
48                return (List<AccessibilityNodeInfo>) (List<?>)
49                    bridge.findAccessibilityNodeInfosByText(text, virtualViewId);
50            }
51
52            @Override
53            public boolean performAccessibilityAction(int action, int virtualViewId) {
54                return bridge.performAccessibilityAction(action, virtualViewId);
55            }
56        };
57    }
58}
59