ViewCompat.java revision 47dc57337c13a2760ea3512ad84d6aa9f24ccd28 
1/*
2 * Copyright (C) 2011 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;
18
19import android.view.View;
20
21/**
22 * Helper for accessing newer features in View.
23 */
24public class ViewCompat {
25    interface ViewCompatImpl {
26        public boolean canScrollHorizontally(View v, int direction);
27        public boolean canScrollVertically(View v, int direction);
28    }
29
30    static class BaseViewCompatImpl implements ViewCompatImpl {
31        public boolean canScrollHorizontally(View v, int direction) {
32            return false;
33        }
34        public boolean canScrollVertically(View v, int direction) {
35            return false;
36        }
37    }
38
39    static class ICSViewCompatImpl implements ViewCompatImpl {
40        public boolean canScrollHorizontally(View v, int direction) {
41            return ViewCompatICS.canScrollHorizontally(v, direction);
42        }
43        public boolean canScrollVertically(View v, int direction) {
44            return ViewCompatICS.canScrollVertically(v, direction);
45        }
46    }
47
48    static final ViewCompatImpl IMPL;
49    static {
50        // TODO Change this to a real check once ICS's API level is finalized
51        if (android.os.Build.VERSION.CODENAME.equals("IceCreamSandwich")) {
52        //if (android.os.Build.VERSION.SDK_INT >= 14) {
53            IMPL = new ICSViewCompatImpl();
54        } else {
55            IMPL = new BaseViewCompatImpl();
56        }
57    }
58
59    public static boolean canScrollHorizontally(View v, int direction) {
60        return IMPL.canScrollHorizontally(v, direction);
61    }
62
63    public static boolean canScrollVertically(View v, int direction) {
64        return IMPL.canScrollVertically(v, direction);
65    }
66}
67