README.md
1
2 Android DirectBoot Sample
3 ===================================
4
5 Sample demonstrating how to store data in a device protected storage which
6 is always available while the device is booted both before and after any
7 user credentials(PIN/Pattern/Password) are entered.
8
9 Introduction
10 ------------
11
12 This sample demonstrates how to store and access data in a device protected
13 storage which is always available while the device is booted.
14 Starting from Android N, the system provides two storage locations for user data:
15
16 - Credential protected:
17 - The default storage location for all apps, available only after the user has entered their pattern/password
18
19 - Device protected:
20 - A new storage location which is always available while the device is booted, both before and after any user credentials are entered
21
22 Apps can mark individual components as being direct boot aware which indicates to the system that they can safely run when
23 Credential protected storage is unavailable (an direct boot aware component primarily relies on data stored in the new Device protected storage area,
24 but they may access Credential protected data when unlocked) by adding `directBootAware="true"` in the manifest.
25 ```
26 <activity|provider|receiver|service ...
27 android:directBootAware=true>
28 ```
29
30 Components marked as directBoot aware are normal components that will continue to be available after the
31 Credential protected storage becomes available. The storage APIs on the Context supplied to these components will always point to Credential protected storage by default.
32 To access Device protected storage, you can create a secondary Context using this API
33 ```
34 Context.createDeviceProtectedStorageContext()
35 ```
36 All of the storage APIs on this returned Context will be redirected to point at Device protected storage.
37
38 You need to be careful what data is stored/moved to a device protected storage
39 because the storage isn't protected by the user's credential (PIN/Pattern/Password)
40 You shouldn't store sensitive data (such as user's emails, auth tokens) in a
41 device protected storage.
42
43 Pre-requisites
44 --------------
45
46 - Android SDK 24
47 - Android Build Tools v24.0.1
48 - Android Support Repository
49
50 Screenshots
51 -------------
52
53 <img src="screenshots/1.png" height="400" alt="Screenshot"/> <img src="screenshots/2.png" height="400" alt="Screenshot"/> <img src="screenshots/3.png" height="400" alt="Screenshot"/> <img src="screenshots/4.png" height="400" alt="Screenshot"/>
54
55 Getting Started
56 ---------------
57
58 This sample uses the Gradle build system. To build this project, use the
59 "gradlew build" command or use "Import Project" in Android Studio.
60
61 Support
62 -------
63
64 - Google+ Community: https://plus.google.com/communities/105153134372062985968
65 - Stack Overflow: http://stackoverflow.com/questions/tagged/android
66
67 If you've found an error in this sample, please file an issue:
68 https://github.com/googlesamples/android-DirectBoot
69
70 Patches are encouraged, and may be submitted by forking this project and
71 submitting a pull request through GitHub. Please see CONTRIBUTING.md for more details.
72
73 License
74 -------
75
76 Copyright 2016 The Android Open Source Project, Inc.
77
78 Licensed to the Apache Software Foundation (ASF) under one or more contributor
79 license agreements. See the NOTICE file distributed with this work for
80 additional information regarding copyright ownership. The ASF licenses this
81 file to you under the Apache License, Version 2.0 (the "License"); you may not
82 use this file except in compliance with the License. You may obtain a copy of
83 the License at
84
85 http://www.apache.org/licenses/LICENSE-2.0
86
87 Unless required by applicable law or agreed to in writing, software
88 distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
89 WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
90 License for the specific language governing permissions and limitations under
91 the License.
92