1 /*
2  * Copyright (C) 2017 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 package com.android.wallpaper.picker;
17 
18 import android.annotation.Nullable;
19 import android.content.Context;
20 import android.content.Intent;
21 
22 /**
23  * Interface for activities that launch an Android custom image picker.
24  */
25 public interface MyPhotosStarter {
26 
27     /**
28      * Requests that this Activity show the Android custom photo picker for the sake of picking a
29      * photo to set as the device's wallpaper.
30      */
requestCustomPhotoPicker(PermissionChangedListener listener)31     void requestCustomPhotoPicker(PermissionChangedListener listener);
32 
33     /**
34      * Interface for clients to implement in order to be notified of permissions grant status changes.
35      */
36     interface PermissionChangedListener {
37         /**
38          * Notifies that the user granted permissions.
39          */
onPermissionsGranted()40         void onPermissionsGranted();
41 
42         /**
43          * Notifies that the user denied permissions.
44          *
45          * @param dontAskAgain True if user checked "Don't ask again" on the most recent permissions
46          *                     request prior to denying it.
47          */
onPermissionsDenied(boolean dontAskAgain)48         void onPermissionsDenied(boolean dontAskAgain);
49     }
50 
51     interface MyPhotosStarterProvider {
52 
getMyPhotosStarter()53         MyPhotosStarter getMyPhotosStarter();
54     }
55 
56     /**
57      * Interface for a provider of the intent to start the "My Photos" picker.
58      * Defaults to resolving {@link Intent#ACTION_PICK}.
59      */
60     interface MyPhotosIntentProvider {
61 
62         /**
63          * @return the Intent to use to start the "My Photos" picker.
64          */
getMyPhotosIntent(Context context)65         default Intent getMyPhotosIntent(Context context) {
66             Intent intent = new Intent(Intent.ACTION_PICK);
67             intent.setType("image/*");
68             return intent;
69         }
70 
71         @Nullable
getFallbackIntent(Context context)72         default Intent getFallbackIntent(Context context) {
73             return null;
74         }
75     }
76 }
77