1 /*
2  * Copyright (C) 2016 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 androidx.core.view;
18 
19 import static androidx.annotation.RestrictTo.Scope.LIBRARY_GROUP;
20 
21 import android.app.Activity;
22 import android.os.Build;
23 import android.view.DragAndDropPermissions;
24 import android.view.DragEvent;
25 
26 import androidx.annotation.Nullable;
27 import androidx.annotation.RestrictTo;
28 
29 /**
30  * Helper for accessing features in {@link android.view.DragAndDropPermissions} a backwards
31  * compatible fashion.
32  */
33 public final class DragAndDropPermissionsCompat {
34     private Object mDragAndDropPermissions;
35 
DragAndDropPermissionsCompat(Object dragAndDropPermissions)36     private DragAndDropPermissionsCompat(Object dragAndDropPermissions) {
37         mDragAndDropPermissions = dragAndDropPermissions;
38     }
39 
40     /** @hide */
41     @RestrictTo(LIBRARY_GROUP)
42     @Nullable
request(Activity activity, DragEvent dragEvent)43     public static DragAndDropPermissionsCompat request(Activity activity, DragEvent dragEvent) {
44         if (Build.VERSION.SDK_INT >= 24) {
45             DragAndDropPermissions dragAndDropPermissions =
46                     activity.requestDragAndDropPermissions(dragEvent);
47             if (dragAndDropPermissions != null) {
48                 return new DragAndDropPermissionsCompat(dragAndDropPermissions);
49             }
50         }
51         return null;
52     }
53 
54     /**
55      * Revoke the permission grant explicitly.
56      */
release()57     public void release() {
58         if (Build.VERSION.SDK_INT >= 24) {
59             ((DragAndDropPermissions) mDragAndDropPermissions).release();
60         }
61     }
62 }
63