Android N Highligts & Constraint Layout & Android N 7.1 Update

1. #dfkutahya
Android N Highlights!

2. #dfkutahya
Sercan Yusuf
Android Developer
GDG Tekirdağ Organizer
@Srcn_ysf
srcnysf@gmail.com

3. #dfkutahya
• So many Android N Features
• ConstraintLayout
• Suprise!
• Demo
• How to Implement Some of Them in our App

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Multi-Window : Split Screen
android:resizeableActivity=["true" | "false"]
<activity android:name=".MyActivity">
<layout android:defaultHeight="500dp"
android:defaultWidth="600dp"
android:gravity="top|end"
android:minHeight="450dp"
android:minWidth="300dp" />
</activity>
Activity.isInMultiWindowMode()
Activity.onMultiWindowModeChanged()
Intent.FLAG_ACTIVITY_LAUNCH_ADJACENT

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Multi-Window : Split Screen
Intent intent = new Intent(Intent.ACTION_VIEW);
intent.addFlags(Intent.FLAG_ACTIVITY_LAUNCH_ADJACENT);

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Drag and Drop
Now betweenactivities!

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Drag And Drop
android.view.DragAndDropPermissions
Token object responsible for specifying the permissions granted to
the app that receives a drop.
View.startDragAndDrop()
View.DRAG_FLAG_GLOBAL
View.DRAG_FLAG_GLOBAL_URI_READ
View.DRAG_FLAG_GLOBAL_URI_WRITE
View.cancelDragAndDrop()
View.updateDragShadow()
Activity.requestDragAndDropPermissions()
Requests the permissions for the content URIs passed
with the ClipData contained in a DragEvent.

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Notifications

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Notifications
• New Templates

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Notifications
• New Templates
• Bundled Notifications

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Notifications
• New Templates
• Bundled Notifications
• Direct reply

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Required notification contents
A Notification object must contain the following:
• A small icon, set by setSmallIcon()
• A title, set by setContentTitle()
• Detail text, set by setContentText()
Notification.DecoratedCustomViewStyle()
Notification.DecoratedMediaCustomViewStyle()
Builder.setCustomContentView()

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Bundled Notifications
ApplicationCompat.Builder.setGroup(String);

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Notification priority

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Notification priority
NotificationCompat.Builder.setPriority()
PRIORITY_MIN (-2)
PRIORITY_MAX (2)
PRIORITY_DEFAULT (0)

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Quick Settings
Tile

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Quick Settings Tile

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Quick Settings Tile
holds the state of a tile that will be displayed in Quick Settings
•TileService
provides the user a tile that can be added to Quick Settings
•Tile

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Quick Settings Tile
<service
android:name=".feature.PocketQuickSettingsTileService"
android:icon="@drawable/ic_bookmark"
android:label="@string/unread_articles"
android:permission=“android.permission
.BIND_QUICK_SETTINGS_TILE">
<intent-filter>
<action android:name=“android.service
.quicksettings.action.QS_TILE" />
</intent-filter>
</service>

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Tile
STATE_ACTIVE
STATE_INACTIVE
STATE_UNAVAILABLE
describeContents()
getContentDescription()
getIcon()
getLabel()
getState()
setContentDescription
(CharSequence contentDescription)
setLabel(CharSequence label)
setIcon(Icon icon)
setState(int state)
updateTile()

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TileService

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TileService

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TileService

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TileService

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Doze Mode

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Data Saver

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ConnectivityManager connMgr = (ConnectivityManager)
getSystemService(Context.CONNECTIVITY_SERVICE);
if (connMgr.isActiveNetworkMetered()) {
switch (connMgr.getRestrictBackgroundStatus) {
case RESTRICT_BACKGROUND_STATUS_ENABLED:
// background data blocked, use less data in foreground
too
break;
case RESTRICT_BACKGROUND_STATUS_WHITELISTED:
// App should limit usage in fg and bg
break;
case RESTRICT_BACKGROUND_STATUS_DISABLED:
// data saver disabled, but still on metered network
break; }
Data Saver

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Display Size

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Multi Local
• User can select multiple languages
• Order them
• Also added new languages, variants

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ACTION_USER_UNLOCKED
Direct Boot

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•Scoped Directory Access
•Number Blocking
•Call Screening
• Project Svelte: Background Optimizations
•OpenGL™ ES 3.2 & Vulkan API

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ConstraintLayout

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ConstraintLayout
● Designed to reduce nesting
● Small - 100 kb
● Compatible since Gingerbread(2.3) (%99.9 percent of
devices)
● First Layout in conjunction with tool (Android Studio)
● Designed to reduce nesting

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1. Ensure you have the latest Android Support Repository (version 32 or higher):
a. Click Tools > Android > SDK Manager.
b. Click the SDK Tools tab.
c. Select Android Support Repository, then click OK.
2. Add the Constraint Layout library as a dependency in your build.gradle file:
dependencies {
compile 'com.android.support.constraint:constraint-layout:1.0.0-alpha5'
}
3. In the toolbar or sync notification, click Sync Project with Gradle Files.
——
To add a new constraint layout to your project:
1. Right-click on your module's layout directory, then click New > XML > Layout XML.
2. Enter a name for the layout and enter "android.support.constraint.ConstraintLayout" for the Root
Tag.
3. Click Finish.

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Creating Manual Constraints

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AutoConnect

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AutoConnect

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Infer Constraints

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ConstraintLayout

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Layout Inspector

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Layout Inspector
Delete Constraint
Positioning the widget relative to
constraints
Horizontal - vertical bias

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Layout Inspector
Inner Dimensions
Wrap Content
Any Size
Fixed

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Handling Visibility
Invisible
Gone

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constraint_layout_devfest.xml
<ImageView
android:src="@android:drawable/btn_star"
android:layout_width="0dp"
android:layout_height="267dp"
android:id="@+id/imageView"
android:layout_marginBottom="16dp"
android:layout_marginStart="16dp"
android:layout_marginTop="16dp"
android:layout_marginEnd="16dp"
app:layout_constraintLeft_toLeftOf="@+id/constraintLayout"
app:layout_constraintTop_toTopOf="@+id/constraintLayout"
app:layout_constraintRight_toRightOf="@+id/constraintLayout"
app:layout_constraintBottom_toBottomOf="@+id/constraintLayout"
tools:layout_constraintLeft_creator="1"
tools:layout_constraintTop_creator="1"
tools:layout_constraintRight_creator="1" />
standard
already know
important
only for Android Studio

47. #dfkutahya
ConstraintLayout Attributes
● layout_constraintTop_toTopOf — Align the top of the desired view to the top of another.
● layout_constraintTop_toBottomOf — Align the top of the desired view to the bottom of another.
● layout_constraintBottom_toTopOf — Align the bottom of the desired view to the top of another.
● layout_constraintBottom_toBottomOf — Align the bottom of the desired view to the bottom of another.
● layout_constraintLeft_toTopOf — Align the left of the desired view to the top of another.
● layout_constraintLeft_toBottomOf — Align the left of the desired view to the bottom of another.
● layout_constraintLeft_toLeftOf — Align the left of the desired view to the left of another.
● layout_constraintLeft_toRightOf — Align the left of the desired view to the right of another.
● layout_constraintRight_toTopOf — Align the right of the desired view to the top of another.
● layout_constraintRight_toBottomOf — Align the right of the desired view to the bottom of another.
● layout_constraintRight_toLeftOf — Align the right of the desired view to the left of another.
● layout_constraintRight_toRightOf — Align the right of the desired view to the right of another.

48. #dfkutahya
Demo!!!!

49. #dfkutahya
Android Nougat 7.1

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Using Static Shortcuts

51. #dfkutahya
<manifest xmlns:android="http://schemas.android.com/apk/res/
android"
package="com.example.myapplication">
<application ... >
<activity android:name="Main">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" /
>
</intent-filter>
<meta-data android:name="android.app.shortcuts"
android:resource="@xml/shortcuts" />
</activity>
</application>
</manifest>
Using Static Shortcuts

52. #dfkutahya

53. #dfkutahya
Using Dynamic Shortcuts
Dynamic shortcuts should provide links to
specific, context-sensitive actions within
your app. These actions can change
between uses of your app, and they can
change even while your app is running. Good
candidates for dynamic shortcuts include
calling a specific person, navigating to a
specific location, and viewing the current
score for a specific game.

54. #dfkutahya
The ShortcutManager API allows you to complete the following
operations on dynamic shortcuts:
• Publish: Use setDynamicShortcuts(List) to redefine the entire
list of dynamic shortcuts, or use addDynamicShortcuts(List)
to augment an existing list of dynamic shortcuts.
• Update: Use the updateShortcuts(List) method.
• Remove: Remove a set of dynamic shortcuts using
removeDynamicShortcuts(List), or remove all dynamic
shortcuts using removeAllDynamicShortcuts().

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Image Keyboard Support

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• Enhanced Live Wallpaper Metadata
• Round Icon Resources
When a launcher requests an app icon, the
framework returns either android:icon or
android:roundIcon, depending on the device
build configuration.

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• Storage Manager Intent
• Improved VR Thread Scheduling
• Demo User Hint
Apps can now check to see if the device is running as the demo user.
• APIs for Carriers and Calling Apps
• New Screen Densities for Wear Devices
• DENSITY_260
• DENSITY_300
• DENSITY_340

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Questions ?

60. #dfkutahya
• https://developer.android.com/about/versions/nougat/android-7.0.html
• https://developer.android.com/preview/api-overview.html
• https://www.youtube.com/watch?
v=B08iLAtS3AQ&index=5&list=PLOU2XLYxmsILe6_
• https://www.youtube.com/watch?
v=sO9aX87hq9c&list=PLWz5rJ2EKKc8jQTUYvIfqA9lMvSGQWtte&index=39

61. #dfkutahya
@Srcn_ysf
www.srcnysf.com
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