Slide used for I/O Rewind Bangkok 2015 related to What's new in Android in developer's perspective.

1. What’s new in Android M
nuuneoi

2. Stands for ...
mmmm

3. Stands for ...
Preview

4. Building M Preview Apps
Android M is now available on SDK Manager

5. Building M Preview Apps

6. Previewssssss

7. OK. Let’s start.

8. Apps Permission
FASTER INSTALLS • SMOOTHER UPGRADES • MORE USER CONTROL

9. Install-time permissions

10. Runtime permissions in M

11. User controls in M

12. Everything you’ve ever asked for
But now your app has to deal with it

13. Apps targeting M can:
can ask for any permission at any time
Legacy apps will:
get all permissions at install time, as before
Users can:
deny any permissions upon request
deny any permissions at any later time – even legacy apps
Test!

14. Voice Interactions

15. Voice Interactions
VoiceInteractor – confirm and prompt for response
<activity android:name="org.example.MyVoiceActivity">
<intent-filter>
<action android:name="org.example.MY_ACTION_INTENT" />
<category android:name="android.intent.category.DEFAULT" />
<category android:name="android.intent.category.VOICE" />
</intent-filter>
</activity>

16. Voice Interactions
public class MyVoiceActivity
extends AppCompatActivity {
@Override
protected void onResume() {
super.onResume();
if (isVoiceInteraction()) {
// do stuff
} else {
finish();
}
}

17. Voice Interactions
public class MyVoiceActivity
extends AppCompatActivity {
@Override
protected void onResume() {
super.onResume();
if (isVoiceInteraction()) {
String prompt = "...";
getVoiceInteractor().submitRequest(
new Confirm(prompt));
} else {
finish();
}
}

18. Voice Interactions
public class Confirm extends
VoiceInteractor.ConfirmationRequest {
public Confirm(String prompt) {
super(prompt, null);
}
@Override
public void onConfirmationResult(
boolean confirmed, Bundle result) {
if (confirmed) {
// do stuff
}
}
}
public class MyVoiceActivity
extends AppCompatActivity {
@Override
protected void onResume() {
super.onResume();
if (isVoiceInteraction()) {
String prompt = "...";
getVoiceInteractor().submitRequest(
new Confirm(prompt));
} else {
finish();
}
}

19. Fingerprint
QUICK USER VERIFICATION

20. Two APIs for fingerprints
FingerprintManager.authenticate()
Verify that authorized user is present
Your app controls all UI
KeyguardManager.createConfirmDeviceCredentialIntent()
Present lock screen to user
startActivityForResult(), check for RESULT_OK
Sample code
github.com/googlesamples/android-FingerprintDialog
github.com/googlesamples/android-ConfirmCredential

21. Android Backup
RESTORATION SOFTWARE

22. Android Backup
All data now backed up by default
targetSdk M
Optional scheme file in xml/ resource dir
includes/excludes

23. Android Backup
AndroidManifest.xml
<application android:fullBackupContent="@xml/mybackupscheme">
...
</application>
res/xml/mybackupscheme.xml
<full-backup-content>
<exclude domain="database" path="device_info.db"/>
</full-backup-content>
or
<full-backup-content>
<include domain="file" path="mydata/allthatmatters.txt"/>
</full-backup-content>

24. Google Play Services
7.5 AND COUNTING

25. GCM Network Manager
Like JobScheduler
… but across releases
OneOffTask
PeriodicTask
Limit network requests to wifi, or charging, or …

26. Also…
Maps on Android Wear
App Invites
Cast Remote Display
Smart Lock for Passwords
…

27. Power
EVEN BETTER BATTERY LIFE

28. Power improvements
Better screen-off battery life
Doze
Untouched devices become “inactive”
Wait longer to wake up for background tasks
Resume normal operation when moved, used, or plugged in
App standby
Unused apps lose network access
Resume when launched/used or when plugged in

29. Assistant Support
CONTEXTUAL INFORMATION, WHEN THE USER NEEDS IT

30. Assistant Support
New APIs to provide the assistant with relevant data
See SDK docs:
Activity.onProvideAssistData(Bundle)
Application.OnProvideAssistDataListener

31. Data Binding
BOUNDS AND DETERMINED

32. Data Binding
Connecting data and UI elements
Automates listener creation, message sending, setters, …
Pre-processed at build time

33. Data Binding
<layout>
<data>
<variable name="item" type="com.android.example.store.Item"/>
</data>
<FrameLayout ...>
<ImageView ... android:src="@{item.image}" />
<TextView ... android:text="@{@string/price(item.dollars, item.cents)}" />
</FrameLayout>
</layout>

34. UI Features
ALL ABOUT YOU AND I

35. Android Design Support Library
Snackbar

36. Android Design Support Library
Snackbar
FAB

37. Android Design Support Library
Snackbar
FAB
CoordinatorLayout

38. Android Design Support Library
Snackbar
FAB
CoordinatorLayout
TabLayout

39. Android Design Support Library
Snackbar
FAB
CoordinatorLayout
TabLayout
TextInputLayout

40. Android Design Support Library
Snackbar
FAB
CoordinatorLayout
TabLayout
TextInputLayout
NavigationView

41. Other UI Changes
RecyclerView ItemTouchHelper
Swipe-to-dismiss
Drag & drop
WebView
PostMessage
WebViewClient
WebSettings.setOffscreenPreRaster()

42. Notifications
HEY! YOU THERE! LOOK UP HERE!

43. android.graphics.drawable.Icon
Holds either:
a drawable resource id
a Bitmap
a byte[] holding a PNG or JPEG

44. Icons in Notifications
Icon ic = Icon.createWithResource(context,
R.drawable.ic_notification);
Notification no = Notification.Builder(context)
.setSmallIcon(ic)
...
.build();

45. Icons in Notifications
Icon ic = Icon.createWithBitmap(iconBitmap);
Notification no = Notification.Builder(context)
.setSmallIcon(ic)
...
.build();

46. Text Stuffs
TEXT IS ALL AROUND

47. Text Selection
Easier Selection
Floating palette with action items
Default for TextView
Other views
set ActionMode.TYPE_FLOATING

48. Text Processing
<intent-filter>
<action android:name="android.intent.action.PROCESS_TEXT"/>
</intent-filter>

49. Higher Quality Text Formatting
TextView.setBreakStrategy(int);
TextView.setHyphenationFrequency(int);
TextView.setIndents(int[] left, int[] right);

50. App Links
RELATIONSHIP BETWEEN APP AND WEB DOMAINS

51. App Links
Understand the relationship
between an app and web domains
owned by the same developer
d.android.com/preview/features/app-linking.html

52. [{
"relation": ["delegate_permission/common.handle_all_urls"],
"target": {
"namespace": "android_app",
"package_name": “com.example.myapp",
"sha256_cert_fingerprints": ["6C:EC:C5:0E:34:AE....EB:0C:9B"]
}
}]
http://example.com/.well-known/statements.json
https: for M final
keytool -list -v -keystore release.keystore

53. Establishing app links
At install time
Package Manager fetches statements.json
Matches hash to APK’s signing certificate
These links will now launch your app
On failure, a link is not created
Usual intent chooser will be shown
Users can review & modify app links
Settings -> Apps -> (Your App) -> Open by default

54. <activity ...>
<intent-filter android:autoVerify="true">
<action android:name="android.intent.action.VIEW" />
<category android:name="android.intent.category.DEFAULT" />
<category android:name="android.intent.category.BROWSABLE" />
<data android:scheme="http" android:host=“example.com" />
<data android:scheme="http" android:host="www.example.com" />
</intent-filter>
</activity>
AndroidManifest.xml
This is where we will look for /.well-known/statements.json

55. Establishing app links
At install time
Package Manager fetches statements.json
Matches hash to APK’s signing certificate
These links will now launch your app
On failure, a link is not created
Usual intent chooser will be shown
Users can review & modify app links
Settings -> Apps -> (Your App) -> Open by default

56. Direct Share
SHARING IS EVEN MORE AWESOME

57. Direct Share
<activity ...>
<intent-filter>
<action android:name="android.intent.action.SEND" />
</intent-filter>
<meta-data android:name="android.service.chooser.chooser_target_service"
android:value=".MyChooserTargetService" />
</activity>
<service android:name=".MyChooserTargetService"
android:permission="android.permission.BIND_CHOOSER_TARGET_SERVICE">
<intent-filter>
<action android:name="android.service.chooser.ChooserTargetService" />
</intent-filter>
</service>
public class MyChooserTargetService extends ChooserTargetService {
@Override
public List<ChooserTarget> onGetChooserTargets(ComponentName targetActivityName,
IntentFilter matchedFilter) {
// do stuff
}
}

58. Stylus support
NOW THE PRESSURE IS REALLY ON

59. Styluses: supported since
ICE_CREAM_SANDWICH
MotionEvent APIs:
TOOL_TYPE_STYLUS
BUTTON_SECONDARY
BUTTON_TERTIARY
getPressure(), getSize(), getOrientation(), etc.
Until now, this only worked for wired/builtin digitizers

60. Bluetooth stylus support
Want to make a Bluetooth stylus?
Report pressure and buttons using Bluetooth HID
Android M will fuse this with touch events
Result touch stream will be TOOL_TYPE_STYLUS
(or TOOL_TYPE_ERASER)
Bluetooth stylus support for every app and every M device

61. New stylus API in M
Button support
ACTION_BUTTON_PRESS, ACTION_BUTTON_RELEASE,
BUTTON_STYLUS_PRIMARY, BUTTON_STYLUS_SECONDARY
Gesture support
ScaleGestureDetector.setStylusScaleEnabled(bool)
Quick scale with button-click+drag
OnGestureListener.onStylusButtonPress
Use this for selection & drag-and-drop

62. Graphics & Media
IT’S ALL ABOUT THE PIXELS

63. RenderScript Compute
BLAS intrinsics
(Really big matrices)
Allocation-less launches
Size of kernel separate from data
ScriptGroup
More dependency types
Better compiler optimizations

64. Camera
New Torch mode
Independent of camera device
CameraManager.setTorchMode(String cameraId, boolean enabled);
public abstract class CameraManager.TorchCallback {
public void onTorchModeUnavailable(String cameraId) {}
public void onTorchModeChanged(String cameraId, boolean enabled) {}
}

65. Alpha Optimization
Auto hardware layer for translucent Views
Call setLayerType() yourself still a Good idea

66. MIDI
Your could already do this…
… but it was a lot of work
Introducing … android.media.midi
MidiDeviceManager
MidiInputPort
MidiOutputPort
MidiDeviceService

67. High Resolution Audio
Audio samples: single-precision float
Sample rate: 96 kHz
USB digital audio: multichannel

68. Tools
MAKE IT HAPPENS

69. Android Studio
Integrated testing support
Data binding
Vector drawables
New annotations
Android NDK

70. Systrace

71. Systrace
ListView item recycling involved inflating views. Ensure
Your Adapter#getView() recycles the incoming View,
Instead of constructing a new one.

72. ART
Compiler optimizations
register allocator
global value number
loop-invariant code motion
dead code elimination
bounds check elimination
constant folding
inlining

73. ART
Runtime stats
Debug.getRuntimeStat(String)
“art.gc.gc-count”
“art.gc.gc-time”
…

74. Misc
REALLY IMPORTANT STUFF WE COULDN’T EASILY CATEGORIZE

75. External Storage
“Adopt” permanent storage
Avoid hard-coded paths
No new APIs!
For Preview testing:
$ adb root && sleep 2
$ adb shell setprop persist.fw.force_adoptable 1
$ adb reboot

76. Developing for Android
Guide for better mobile apps
medium.com/google-developers

77. So what are you waiting for?
Preview: d.android.com/preview
SDK + Android Studio: d.android.com/sdk
System image: d.android.com/sdk
Report bugs: code.google.com/android-developer-preview
DevBytes: youtube.com/GoogleDevelopers

78. Thank you
Q&A