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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 25
     47 - Android Build Tools v25.0.3
     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 2017 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