Santiago Etchebehere | 1ee76a2 | 2018-05-15 15:02:24 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2018 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.module; |
| 17 | |
Sunny Goyal | 8600a3f | 2018-08-15 12:48:01 -0700 | [diff] [blame^] | 18 | import androidx.annotation.IntDef; |
Santiago Etchebehere | 1ee76a2 | 2018-05-15 15:02:24 -0700 | [diff] [blame] | 19 | |
| 20 | |
| 21 | /** |
| 22 | * Provides updates on the status of packages (installed, updated, removed). |
| 23 | * Abstraction layer above Android's LauncherApps. |
| 24 | */ |
| 25 | public interface PackageStatusNotifier { |
| 26 | |
| 27 | /** |
| 28 | * Possible app statuses. |
| 29 | */ |
| 30 | @IntDef({ |
| 31 | PackageStatus.ADDED, |
| 32 | PackageStatus.CHANGED, |
| 33 | PackageStatus.REMOVED |
| 34 | }) |
| 35 | @interface PackageStatus { |
| 36 | int ADDED = 1; |
| 37 | int CHANGED = 2; |
| 38 | int REMOVED = 3; |
| 39 | } |
| 40 | |
| 41 | /** |
| 42 | * Interface to be notified when there's a package event. |
| 43 | */ |
| 44 | interface Listener { |
| 45 | /** |
| 46 | * Called when a package status' change. |
| 47 | * @param packageName name of the package that changed |
| 48 | * @param status the new {@link PackageStatus} for that package |
| 49 | */ |
| 50 | void onPackageChanged(String packageName, @PackageStatus int status); |
| 51 | } |
| 52 | |
| 53 | /** |
| 54 | * Add a {@link Listener} to be notified of package events. Only packages that declare an |
| 55 | * Activity or Service responding to that Intent Action will trigger the Listener's callback, |
| 56 | * except for the case of PackageStatus#REMOVED which will be triggered for any removed package |
| 57 | * (since it will trigger after the package has been already removed) |
| 58 | * @param listener Callback to be notified of changes |
| 59 | * @param action Intent action to filter packages to be notified about |
| 60 | * (except for REMOVED status) |
| 61 | */ |
| 62 | void addListener(Listener listener, String action); |
| 63 | |
| 64 | /** |
| 65 | * Unregister the given listener. |
| 66 | */ |
| 67 | void removeListener(Listener listener); |
| 68 | } |