Slides used in Google I/O Extended Bangkok 2016 session

1. What’s new in aNdroid

3. The Droid has no name

4. #GeekAlert

5. #teamAndroid

6. ConstraintLayout

7. Multi-Window: Split Screen

8. Freeform
Mode

9. Multi-Window Lifecycle
Only focused Activity is active.
The rest are in “Paused” state.
[Live Demo]

10. Multi-Window Lifecycle
Default behavior:
Recreate the Activity upon resizing
Or handle it yourself:
<activity android:configChanges=
“screenSize|smallestScreenSize|screenLayout|orientation"
...

11. Multi-Window: Split Screen
android:resizeableActivity=["true" | "false"]
<activity android:name=".MyActivity">
<layout android:defaultHeight="500dp"
android:defaultWidth="600dp“
android:minHeight="200dp"
android:minWidth="200dp"
android:gravity="top|end"/>
</activity>
Activity.isInMultiWindowMode()
Activity.onMultiWindowModeChanged()

12. Multi-Window: Split Screen
Intent.FLAG_ACTIVITY_LAUNCH_ADJACENT

13. Multi-Window: Picture-in-Picture

14. Multi-Window: Picture-in-Picture
<activity android:name=".MyActivity“
android:resizeableActivity="true“
android:supportsPictureInPicture="true"
android:configChanges=
“screenSize|smallestScreenSize|screenLayout|orientation"
...
Activity.enterPictureInPictureMode()
Activity.isInPictureInPictureMode()
Activity.onPictureInPictureModeChanged()

15. Drag n’ Drop
View.startDragAndDrop()
View.DRAG_FLAG_GLOBAL
View.DRAG_FLAG_GLOBAL_URI_READ
View.DRAG_FLAG_GLOBAL_URI_WRITE
View.cancelDragAndDrop()
View.updateDragShadow()
android.view.DragAndDropPermissions
Activity.requestDragAndDropPermissions()

16. Notifications
• New templates

17. Notifications
• New templates
• Bundled notifications

18. Notifications
• New templates
• Bundled notifications
• Direct Reply [Live Demo]

19. Notifications
• New templates
• Bundled notifications
• Direct Reply [Live Demo]
• Custom View [Live Demo]

20. Notifications
• New templates
• Bundled notifications
• Direct Reply [Live Demo]
• Custom View [Live Demo]
• Message Style

21. Quick Settings
• Users: Choose your favorite tiles!
• Reorder them, too
• Top 5 become your
even-quicker-quick-settings
• [Live Demo]

22. Quick Settings
• Developers: Create your own tiles!
• Key classes:
android.service.quicksettings.TileService
onTileAdded(), onTileRemoved()
onStartListening(), onStopListening()
onClick()
getQsTile() -> android.service.quicksettings.Tile
setState(), setLabel(), setIcon()
then, updateTile()

23. Quick Settings
<service
android:name=".MyTileService"
android:label="@string/starting_label"
android:icon="@drawable/starting_icon"
android:permission="android.permission.BIND_QUICK_SETTINGS_TILE">
<intent-filter>
<action android:name="android.service.quicksettings.action.QS_TILE" />
</intent-filter>
</service>

24. Display Size
• User-determined display size
• All UI, not just text
• .85x – 1.45x
• Avoid px
• Ensure your app works well on sw320dp

26. Multi-Locale
• User can select multiple languages
• And order them
• Also added new languages, variants
• [Live Demo]

27. Doze
Marshmallow

28. The ~Extended~ Doze mode
N

29. Doze in N

30. Doze
• Marshmallow
• Screen off, on battery, stationary
• Restricts network, services, defers jobs, syncs, alarms
• N
• All of the above, plus
• Screen off, on battery, not stationary
• Restricts network, defers jobs, syncs

31. Project Svelte
ConnectivityManager.CONNECTIVITY_ACTION
Camera.ACTION_NEW_PICTURE
Camera.ACTION_NEW_VIDEO
JobScheduler
JobScheduler.Builder.addTriggerContentUri();
Goodbye
Hello!

32. Data Saver

33. Data Saver Flowchart

34. Data Saver
getSystemService(Context.CONNECTIVITY_SERVICE);
ConnectivityManager.isActiveNetworkMetered();
ConnectivityManager.getRestrictBackgroundStatus();

35. Data Saver

36. Direct Boot

37. Direct Boot: App Storage Areas

38. Direct Boot: App Storage Areas

39. Direct Boot: App Storage Areas

40. Direct Boot
<receiver
android:directBootAware="true" >
...
<intent-filter>
<action android:name="android.intent.action.LOCKED_BOOT_COMPLETED" />
<action android:name="android.intent.action.BOOT_COMPLETED" />
</intent-filter>
</receiver>

41. Scoped Directory Access
StorageManager sm = (StorageManager)getSystemService(Context.STORAGE_SERVICE);
StorageVolume volume = sm.getPrimaryVolume();
Intent intent = volume.createAccessIntent(Environment.DIRECTORY_PICTURES);
startActivityForResult(intent, request_code);

42. Android for Work

43. Runtime
• Faster interpreter
• JIT
• Faster install times
• Less space consumed on device
• Faster reboots
• Apps use partial AOT
• Only for hotspots

44. New Runtime Libraries
• ICU4J
• Unicode and globalization support
• Subset exposed in android.icu
• Avoids conflicts with com.ibm.icu
• Deprecated and unstable APIs omitted
• Functional Interface
• java.util.function
• java.util.stream

45. Java 8 Language Features
• Require the Jack toolchain
android {
...
defaultConfig {
...
jackOptions {
enabled true
}
}
compileOptions {
sourceCompatibility JavaVersion.VERSION_1_8
targetCompatibility JavaVersion.VERSION_1_8
}
}

46. Lambdas
• Implemented using anonymous class
• Backward compatible with Gingerbread
Vertex[] v = new Vertex[100];
// ...
Arrays.sort(v, (Vertex v1, Vertex v2) -> {
return v1.length() - v2.length();
});
Arrays.sort(v, (v1, v2) -> v1.length() - v2.length());
Arrays.sort(v, VertexFactory::compareVertices);

47. Default & Static Interface Methods
• Not backward compatible
public interface Renderable {
void draw(Canvas c);
default bool isHardwardAccelerated() {
return false;
}
static int getMaxTextureSize() { return 2048; }
}
public interface FrameListener {
default void onFrameStarted() { }
default void onFrameEnded() { }
}

48. Stream APIs
• Not backward compatible
List<String> dictionary = ...
dictionary.stream()
.filter(s -> s.contains("droid"))
.sorted()
.limit(10)
.forEach(s -> Log.d(TAG, "I love the word " + s));

49. Repeating Annotations
• Not backward compatible
@Schedule(metered=false, frequencyInHours=24)
@Schedule(metered=true, frequencyInHours=1)
public void fullSync() {
...
}

50. Java Audio Latency
• Previous releases reduced native latency
• Lower latency AudioTrack (40-70ms reduction)
AudioAttributes attributes = new AudioAttributes.Builder()
.setFlags(AudioAttributes.FLAG_LOW_LATENCY)
.setContentType(AudioAttributes.CONTENT_TYPE_MUSIC)
.build();
• Dynamic resize of AudioTrack buffers
• Underruns query

51. Renderscript
• Single source
• Many kernels in a single file
• Launch kernels from kernels
• Reduction kernels
• Access multiple image buffers from video streams
• Allocation.getByteBuffer() to reduce copies
• Enhanced fp16 support

52. OpenGL ES 3.2
• GLES 3.1 + Android extension pack
• Except EXT_texture_sRGB_decode
• Advanced blending equations
• Tesselation shaders
• Geometry shaders
• ASTC (LDR)
• Image atomics
• Floating point framebuffers

53. Vulkan
• Low-level, low-overhead, cross-platform 3D API
• Asynchronous/multithreaded command generation
• Intermediate shader binary format (SPIR-V)
• Offline shaders compilation
• Object-based API, no global state
• Explicit memory management and synchronization
• No error checking

54. adb shell
• Returns remote process exit status
• Pass-through stdin
$ cat README | adb shell wc -l
• Handles window size and terminal type
• Improved command line tools (ls, etc.)
• Improved performance (push, pull)

55. NDK
• Clang 3.8
• GCC 4.9
• Switch to clang, GCC is deprecated!
• ARM toolchains default to arm7 arch

56. VR
Activity.setVRModeEnabled(boolean);
https://developers.google.com/vr/android/

57. Support Library
Future is here

58. Support Library
• Night Mode
• Bottom Sheets
• VectorDrawable / AnimatedVectorDrawable
• RecyclerView
• Design Support Library
• Chrome Custom Tabs
• etc.

59. Other UI Goodies
• VectorDrawable performance improvements
• Loading, rendering improved 20-90% in N
• FloatProperty / IntProperty

61. Android Instant Apps

63. Android Instant Apps
• Sneak preview now
• Rolling out to developers over the next year
• Build inside Android Studio
• Just a different build artifact
• Demos in the Play Sandbox

64. Android N Release Date

65. Go Get It!

66. Go Get It!
Learn: d.android.com/preview
Get: d.android.com/preview/setup-sdk.html
Report: d.android.com/preview/bug

67. Thank you