What's new in Android O

What's new in Android O?

Transcript

1. Whats is new in Android O ? By: Naseem Abuata
2. Agenda • Background limits • Notifications • Autofill APIs • Picture in picture • Font resources in XML • Adaptive icons • Wide-gamut color for apps • Connectivity • Keyboard navigation • WebView enhancements • Security & Privacy • Java 8 • And more... • Summray
3. Background execution limits • Background Service Limitations • Broadcast Limitations
4. What is a “Background” App?
5. What is a “Background” “Foreground” App?
6. What’s a Foreground App? App is foreground when: • It has a visible activity. • It has foreground service. • Another foreground is connected to the app. Note: Wake locks will be released (cached state)
7. No background anymore! • No background services. • Short window until Service.stopSelf(). • IllegalArgumentException: ◦ Service.startService(). ◦ PendingIntent Service.
8. No background anymore! (but) • Handling a high-priority Firebase Cloud Messaging (FCM) message. • Receiving a broadcast, such as an SMS/MMS message. • Executing a PendingIntent from a notification.
9. Background tasks? • Reduce. • Foreground. • Background: ◦ Defer/Schedule. ◦ Coalesce.
10. AlarmManager
11. JobScheduler • Wrapper around background activity • Schedule base on: ◦ Time window ◦ Network type ◦ Device charging ◦ Device charging & unused ◦ Content provide • API >=21
12. JobScheduler • Wrapper around background activity • Schedule base on: ◦ Time window ◦ Network type ◦ Device charging ◦ Device charging & unused ◦ Content provide • API >=21
13. Firebase Dispatcher • AKA GCM network manager • JobScheduler API • Need Google Play service • API >=9
14. Example
15. Android Job by evernote • Single API to use: ◦ AlaramManager ◦ JobSchedule ◦ GCM Network • No manifest! • No need for Play Services • API >=14
16. Background? Library Min API Requires Google Play Service API1 Custom retry strategies JobScheduler 21 No JobScheduler Yes JobDispatcher 9 Yes JobScheduler Yes Android Job 14 No2 Custom Yes 1: Refers to the methods that need to be implemented in the Service subclass. 2: Uses AlarmManager to support API levels <= 21 if Google Play services is unavailable.
17. Background tasks? • Reduce. • Foreground. • Background: ◦ Defer/Schedule. ◦ Coalesce.
18. Background tasks? • Reduce. • Foreground. • Background: ◦ Defer/Schedule. ◦ Coalesce.
19. Broadcast Limitations • No Manifest-declared Implicit Broadcast anymore! ◦ No PACKAGE_ADDED ◦ No ACTION_PACKAGE_REPLACED, but you can use ACTION_MY_PACKAGE_REPLACED (explicit) ◦ Can be defined in run time. • Exceptions ◦ ACTION_BOOT_COMPLETED ◦ ACTION_HEADSET_PLUG ◦ ACTION_LOCALE_CHANGED ◦ Full list https://developer.android.com/preview/features/background-broadcasts.html
20. Background location limits Who is Affected: • Fused Location Provider (FLP) • Geofencing • GNSS Measurements • Location Manager How this will effects: • Background apps receive location updates less frequently.
21. Notification • Notification channels • Snoozing • Notification timeout • Notification dismissal • Background colors • Messaging style • Notification Badges
22. Notification Channels • Per-app • Reading Notification Channel Settings • MUST: implemented (Android O)
23. Notification Channels
24. Notification Badges
25. Notification Badges
26. Autofill framework • Less time spent in filling fields Autofill saves users from re-typing information. • Minimize user input errors
27. Font resources in XML Android custom fonts: XML: • Style.xml (>21 & only Roboto fonts) Programmatically: • Use Custom TextView (And load custom ttf file from assest) • SetTypeface
28. Adaptive icons • 2 layers and a mask. • Can be animated
29. Wide-gamut color for apps • Current is limited to sRGB • New API helps ◦ To display ◦ Converting between colour spaces
30. Connectivity & Telecom framework • High-quality Bluetooth audio (LDAC codec) • New Wi-Fi features ◦ Wi-Fi Aware (NAN) • Telecom framework ◦ VoIP
31. Keyboard navigation • Arrow navigation • Tab navigation
32. WebView enhancements • Version API • Google Safe Browsing API • Termination Handle API • Renderer Importance API
33. Java 8 APIs and runtime optimizations • Jack toolchain is deprecated!
34. Java 8 • Jack toolchain is deprecated!
35. Jack toolchain
36. Supported Java 8 Language Using Jack toolchain • Default and static interface methods (>=24) • Repeatable annotations (>=24) • Lambda expressions • Method References • Type Annotations Using Default toolchain • Default and static interface methods (>=24) • Repeatable annotations • Lambda expressions • Method References • Type Annotations • faster build speed • Instant Run • 3rd party libraries written with Java 8 is also supported
37. Java 8 APIs Java 8 Language API (>=24) • java.lang.annotation.Repeatable • AnnotatedElement.getAnnotationsByType(Class) • java.util.stream • java.lang.FunctionalInterface • java.lang.reflect.Method.isDefault() • java.util.function
38. Java 8
39. Java 8 - getting started • Need Android Studio 2.4 • Android Plugin for Gradle 2.4
40. Security • SSLv3 is not supported! • HttpsURLConnection could fail when using a bad TLS. • Secure Computing (SECCOMP) filter to all apps • WebView objects now run in multiprocess mode • App APK path is changed! • Native libraries
41. Permissions Prior Android O: When requesting a permission, all the permissions under the same group will be granted. Android O: When requesting a permission, only the requested permissions are granted, however if the app later requests any permission under the same permission group, it will be granted without prompting the user.
42. Privacy (How to identify) • Hardware identifiers: ◦ IMEI ◦ ANDROID ID (CHANGED!) ◦ MAC addresses (<Android 6) • Advertising ID (resettable) • Net.hostname (deprecated!)
43. Privacy (ANDROID ID) Prior Android O: • Same across Apps. Android O: • Unique to each App. • Invariable.
44. Collection handling Android O Collections.sort() -> List.sort() Android 7.x List.sort() -> Collections.sort()
45. Picture-in-Picture mode (PIP) • PIP is a special type of multi-window mode mostly used for video playback. • Multi-window lifecycle.
46. Multi-display support • The same Activity lifecycle • Only one Activity can be resumed
47. Accessibility • Language detection • Accessibility button • Fingerprint gestures • Word-level highlighting • Hint text • Continued gesture dispatch
48. And More • New account access and discovery APIs • AnimatorSet • Autosizing TextView • Smart sharing • App categories • New StrictMode detectors (detectUnbufferedIo() /detectContentUriWithoutPermission() /detectUntaggedSockets() ) • Cached data • Improved media file access • Pinning Shortcuts and Widgets • Content provider paging • New Permissions (answer phone call) • Android enterprise profile
49. When
50. Getting prepared Supporting Android O: • Background Location Limits • Native libraries • Locating APKs • Querying the net.hostname is not supported! Targeting Android O: • Background Service Limitations • Broadcast Limitations • Notifications • Network security configuration • The system properties net.dns1, net.dns2, net.dns3, and net.dns4 are no longer available • Build.SERIAL is deprecated • Permissions • Collection handling
51. Getting prepared Supporting Android O: • Background Location Limits • Native libraries • Locating APKs • Querying the net.hostname is not supported! Targeting Android O: • Background Service Limitations • Broadcast Limitations • Notifications • Network security configuration • The system properties net.dns1, net.dns2, net.dns3, and net.dns4 are no longer available • Build.SERIAL is deprecated • Permissions • Collection handling
52. Questions
53. Data collected during a 7-day period ending on May 2, 2017. Any versions with less than 0.1% distribution are not shown.