Preparing Android apps for Android Q.pdf

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Extended Singapore Preparing apps for Android Q Saurabh Arora, Rakuten Viki @saurabh_arora90

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Where are we? ➢ Decade of Android (10.0) ➢ Beta 4 ➢ Final API’s ➢ API Level 29

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Extended Singapore What's New

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Privacy & Security User Experience

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Extended Singapore Privacy & Security

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Background Activity Starts ➢ Affects - All apps running on Q (irrespective of target SDK) ➢ Exceptions: ○ Bound services such as accessibility, auto-fill, etc. ○ Receives a PendingIntent from system ○ App had SYSTEM_ALERT_WINDOW permission ○ App called finish() on activity very recently ➢ Recommended approach - Notification Triggered activity

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val notificationBuilder = NotificationCompat.Builder(this, CHANNEL_ID) .... .setPriority(NotificationCompat.PRIORITY_HIGH) .setCategory(NotificationCompat.CATEGORY_CALL)

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val fullScreenIntent = Intent(this, CallActivity::class.java) val fullScreenPendingIntent = PendingIntent.getActivity(this, 0, fullScreenIntent, PendingIntent.FLAG_UPDATE_CURRENT) val notificationBuilder = NotificationCompat.Builder(this, CHANNEL_ID) .... .setPriority(NotificationCompat.PRIORITY_HIGH) .setCategory(NotificationCompat.CATEGORY_CALL) .setFullScreenIntent(fullScreenPendingIntent, true)

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➢ Gotcha’s: ○ System decides b/w notification & activity ■ Notification - User using the device ■ Activity - Device Idle / when user interacts with notification ○ Declare USE_FULL_SCREEN_INTENT permission

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Hardware Identifiers ➢ Affects - All apps running on Q (irrespective of target SDK) ○ Exception thrown if Target SDK is Q ○ null returned if Target SDK < Q ➢ Avoid: ○ IMEI - TelephonyManager.getDeviceId() ○ Mac Address ○ ANDROID_ID - Settings.Secure.ANDROID_ID

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Hardware Identifiers ➢ Alternatives ○ Advertising ID ○ Instance ID - FirebaseInstanceId ○ Globally-unique IDs (GUIDs) - UUID.randomUUID().toString()

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Background Location ➢ Distinguish b/w foreground & background ➢ Location permission has 3 options

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Background Location Requests ➢ Affects - Depends

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Background Location Requests ➢ Foreground Service ➢ Background Service

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...

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ActivityCompat.requestPermissions(this, arrayOf(Manifest.permission.ACCESS_COARSE_LOCATION, Manifest.permission.ACCESS_BACKGROUND_LOCATION), your-permission-request-code

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➢ Gotcha’s: ○ System schedules reminders ○ User can revoke permission ○ Always check access

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Extended Singapore User Experiences

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Settings Panel ➢ Bottom sheet for system settings ➢ Encourage app engagement ➢ Currently Supported: ○ ACTION_INTERNET_CONNECTIVITY ○ ACTION_WIFI ○ ACTION_NFC ○ ACTION_VOLUME ➢ AndroidX wrapper

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Gesture Navigation

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Gesture Navigation ➢ Affects - All apps running on Q (irrespective of target SDK) ➢ Recommended approach ○ Draw Edge to Edge ○ Override system gestures

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➢ Draw Behind Navigation Bar ➢ Draw behind Status bar ➢ Strongly recommended

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...... <item name="android:navigationBarColor"> @android:color/transparent </item>

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view.systemUiVisibility = //Layout as if the navigation bar was hidden View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION or //Layout as if the status bar was hidden View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN or //Layout at its most extreme View.SYSTEM_UI_FLAG_LAYOUT_STABLE

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➢ Overlap with system UI? ➢ Use insets ○ WindowInsets

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root.setOnApplyWindowInsetsListener { _, insets -> val fabLp = fab.layoutParams as CoordinatorLayout.LayoutParams fabLp.bottomMargin = fabOriginalBottomMargin + insets.systemWindowInsetBottom fab.layoutParams = fabLp insets.consumeSystemWindowInsets() }

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➢ System Window Insets ➢ Clickable Views

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➢ System Gesture Insets ○ New in Android Q ➢ Draggable Views Insets.getSystemGestureInsets()

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root.setOnApplyWindowInsetsListener { _, insets -> val systemGestureInsets = insets.systemGestureInsets top.layoutParams = top.layoutParams.apply { height = systemGestureInsets.top } bottom.layoutParams = bottom.layoutParams.apply { height = systemGestureInsets.bottom } .... }

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➢ Override system gestures ➢ App gets touch event first

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View.setSystemGestureExclusionRects(List rects)

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➢ Gotcha’s: ○ Seekar & Drawer Layout work of the box ○ Can opt out back gesture ○ Home is reserved WindowInsets.getMandatorySystemGestureInsets()

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Dark Mode

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Dark Mode ➢ A new System Setting ○ Under Settings->Display->Theme ○ A Quick tile ○ Battery Saver Mode ➢ Supported by 1.1 App Compat

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<style name="AppTheme" parent="Theme.MaterialComponents.DayNight">

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<style name="Theme.AppCompat.DayNight" parent="Theme.AppCompat">

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Dark Mode ➢ AppCompatDelegate.setDefaultNightMode() ○ MODE_NIGHT_YES ○ MODE_NIGHT_NO ○ MODE_NIGHT_FOLLOW_SYSTEM ○ MODE_NIGHT_AUTO_BATTERY

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➢ Gotcha’s

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#ABABAB

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#ABABAB #FAFAFA

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➢ Gotcha’s: ○ Check drawables and provide night resources ○ Vectors tint

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➢ Gotcha’s: ○ Test RemoteViews ○ Configuration Change - uiMode ■ UI will lose context if not handled properly ■ Caution single orientation apps ■ Media apps should handle to continue playback

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Extended Singapore Not Covered

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➢ Sharing improvements ➢ Audio Playback Capture ➢ Bubbles

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➢ Non SDK Interfaces ➢ Sharing improvements ➢ Audio Playback Capture ➢ Bubbles

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Extended Singapore Thank Q Questions?