What's new in android 2018 (dev fest)
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What's new in android 2018, a content created by Google, and conducted by Shady Selim, for developers attending DevFest all across Egypt. It combines all the latest Android for Developers updates
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What's new in android 2018 (dev fest)
- 1. Shady Selim Mobile Team Lead What’s new in Android
- 2. What’s New In Android PIA s
- 4. Source: Partner provided data 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 APK size (MBs) Conversion rate decreases as apps get larger Play Store conversion rate (% of visitors who install) Trendline
- 5. xxhdpi hdpixhdpi mdpi ldpixxxhdpi
- 8. xxhdpi arm64 v:14 hdpi arm64 v: 16 xhdpi arm64 v:15 mdpi arm64 v:17 ldpi arm64 v:18 xxxhdpi arm64 v:13 xxhdpi arm v:20 hdpi arm v:22 xhdpi arm v:21 mdpi arm v:23 ldpi arm v:24 xxxhdpi arm v:19 xxhdpi x86 v: 8 hdpi x86 v:10 xhdpi x86 v:9 mdpi x86 v: 11 ldpi x86 v:12 xxxhdpi x86 v: 7 xxhdpi x86_64 v: 2 hdpi x86_64 v: 4 xhdpi x86_64 v:3 mdpi x86_64 v:5 ldpi x86_64 v: 6 xxxhdpi x86_64 v: 1
- 9. xxhdpi arm64 v:14 hdpi arm64 v: 16 xhdpi arm64 v:15 mdpi arm64 v:17 ldpi arm64 v:18 xxxhdpi arm64 v:13 xxhdpi arm v:20 hdpi arm v:22 xhdpi arm v:21 mdpi arm v:23 ldpi arm v:24 xxxhdpi arm v:19 xxhdpi x86 v: 8 hdpi x86 v:10 xhdpi x86 v:9 mdpi x86 v: 11 ldpi x86 v:12 xxxhdpi x86 v: 7 xxhdpi x86_64 v: 2 hdpi x86_64 v: 4 xhdpi x86_64 v:3 mdpi x86_64 v:5 ldpi x86_64 v: 6 xxxhdpi x86_64 v: 1
- 10. Android App Bundle Benefit from a smaller app Stop managing multiple APKs Deliver features on-demandBETA
- 11. Android App Bundle Benefit from a smaller app Stop managing multiple APKs Deliver features on-demandBETA
- 12. Source: Partner provided data saving 11% saving 23% saving 45% saving 22%28% saving ABA English Airbnb LinkedIn Perigee saving 49% RV AppStudios saving 64% Memrise Pluto. TV
- 13. Optimized APK for each device Upload an Android App Bundle Dynamic Delivery
- 14. Optimized APK for each device Upload an Android App Bundle Dynamic Delivery
- 15. /res/xxxhdpi classes.dex /res/xxhdpi config_xxxhdpi.apkbase.apk config_xxxhdpi.apk /res/xhdpi /res/hdpi config_xhdpi.apk config_hdpi.apk /res/mhdpi /res/ldpi config_mhdpi.apk config_ldpi.apk /lib/x86 /lib/arm config_x86.apk config_arm.apk /res/values-en /res/values-fr config_en.apk config_fr.apk /res/values-es config_es.apk …
- 16. App Bundle APK
- 17. Android App Bundle Start today at g.co/androidappbundle
- 18. Android Jetpack Accelerate App Development
- 23. Jetpack Architecture Lifecycle Lifecycle Aware Components
- 24. Jetpack Architecture Lifecycle Lifecycle Aware Components ViewModel View data decoupled from OS lifecycle
- 25. Jetpack Architecture Lifecycle Lifecycle Aware Components ViewModel View data decoupled from OS lifecycle Room SQLite object mapping
- 26. Jetpack Architecture Lifecycle Lifecycle Aware Components ViewModel View data decoupled from OS lifecycle Room SQLite object mapping LiveData Lifecycle aware observables
- 27. Jetpack Architecture Lifecycle Lifecycle Aware Components ViewModel View data decoupled from OS lifecycle Paging (1.0!) Asynchronous data retrieval Room SQLite object mapping LiveData Lifecycle aware observables
- 28. Jetpack Architecture WorkManager Job scheduling Navigation Backstack and app flows PREVIEW
- 29. View Models Simplifying Android development
- 30. 2016: What is the hardest part of Android Development?
- 42. Room A better way to do databases
- 43. 2016: How do you do Databases on Android?
- 50. RoomDatabase App Logic Content Provider Content Values Uri Not type- safe Not type- safe SQLite
- 51. Room DAOSQLite
- 54. using or plan to use
- 55. using or plan to use
- 56. WorkManager Backwards compatible background work PREVIEW
- 57. Battery Optimizations Optimize background tasks to stay charged longer
- 58. Unlimited Background Services Doze App Standby Limited Broadcasts Release Wakelocks Service Limitations App Standby Buckets Background Restrictions
- 59. There is still a lot of work to do Sending logs Uploading images and videos Syncing data Processing data
- 60. Basic Work: upload a photo upload
- 61. // A simple Worker class UploadPhotoWorker : Worker() { override fun doWork(): WorkerResult { uploadPhoto() return WorkerResult.SUCCESS } } SUCCESS FAILURE RETRY Runs on a background thread
- 62. // Creating a work request and enqueuing it val request: WorkRequest = OneTimeWorkRequestBuilder<UploadPhotoWorker>().build() WorkManager.getInstance().enqueue(request) Ω
- 63. What if you lose connectivity? Use constraints!
- 64. // Creating a work request with network constraints val constraints = Constraints.Builder() .setRequiredNetworkType(NetworkType.CONNECTED) .build() val request = OneTimeWorkRequestBuilder<UploadPhotoWorker>() .setConstraints(constraints) .build() WorkManager.getInstance().enqueue(request)
- 69. When to use? Best-Effort Exact Timing ThreadPool Coroutines ThreadPool Coroutines
- 70. When to use? Best-Effort Guarantee d Execution Exact Timing Deferrable ThreadPool Coroutines ThreadPool Coroutines Foreground Service WorkManager
- 71. WorkManager Respects users battery Works with OS Backwards compatible (API14)
- 72. Navigation How to get around your app PREVIEW
- 73. Challenges for navigation Fragment Transactions Deep Links Passing Arguments Up and Back Errorprone Boilerplate Testing
- 74. Home Category Item https://... Need to be created and added to back stack on deep link
- 75. Navigation Graph A navigation graph is a blueprint of screens and the actions that link them.
- 76. Navigation Define navigation graph with visual tool / XML: Make a single navigate() call and runtime library handles everything
- 78. Safe Args Type-safe arguments when launching a Fragment
- 79. HelpFragment.kt if (!arguments.containsKey("screenName")) { throw IllegalArgumentException() } val category: Int = arguments.getInt("category") val screenName: String = arguments.getString("screenName")
- 80. HomeFragment.kt findViewById<Button>(R.id.help_button).setOnClickListener { v -> val helpDirections = HomeFragmentDirections.help("Home") helpDirections.category = 1703 v.findNavController().navigate(helpDirections) }
- 81. HelpFragment.kt val args : HelpFragmentArgs = HelpFragmentArgs.fromBundle(arguments) val screenName: String = args.screenName val category: Int = args.category
- 82. Navigation IDE tooling for app navigation Manage deeplinks Safe argument passing
- 83. Jetpack Architecture Start today at d.android.com/arch
- 84. Integration Tests e2e Tests Unit Tests Android Test Part of Jetpack
- 85. @RunWith(AndroidJUnit4::class) class SimpleUnifiedTest { @Test fun viewIsVisible() { assertEquals(view.visibility, View.VISIBLE) } } Failed: Expected 0 but was 16 F
- 86. @RunWith(AndroidJUnit4::class) class SimpleUnifiedTest { @Test fun viewIsVisible() { assertThat(view).isVisible() } } Failed: View was not visible F
- 87. Core Platform
- 88. Battery App Standby Buckets usage based access to jobs, alarms, network, messaging Background Restriction user can restrict badly-behaved apps
- 89. Background Inputs & Privacy
- 90. Kotlin Performance & Compiler ART, D8, R8 Nullability support library and libcore
- 91. Android KTX Part of Jetpack Concise, readable code. A suite of libraries Android KTX, Testing KTX, ...
- 92. Background Text Measurement Text measurement is expensive Up to 80 to 90% of the draw/measure/layout loop Pre-computed text API offloads most of the work to a worker thread PrecomputedText.create(...)
- 94. val tv: TextView // Distance from top to first baseline tv.firstBaselineToTopHeight = distancePx // Distance from bottom to last baseline tv.lastBaselineToBottomHeight = distancePx
- 95. Smart Linkify Like linkify, but smarter...
- 96. Spannable text = ... TextLinks.Request request = new TextLinks.Request.Builder(text); // On background thread executor.execute { TextClassifier.generateLinks(request).apply(text); textview.post { textview.text = text } }
- 98. Security Unified BiometricDialog @deprecated FingerprintManager Stronger protection for private keys StrongBox backend Build.SERIAL doesn’t work anymore
- 99. System UI Integrating fully with Android
- 100. Display Cutouts Simulate notches in developer options (skip the electrical tape) WindowInsets#getDisplayCutout() android:windowLayoutInDisplayCutoutMode ● mode=”never” ● mode=”default” ● mode=”shortEdges” + DisplayCutout#getSafeInsets() ● mode=”shortEdges” + DisplayCutout#getBounds()
- 101. Slices A new approach to remote content ● Within an app or between apps ● Structured data, flexible templates ● Interactive, updatable ● Backwards-compatible! ● (Support Library, KitKat/API 19+)
- 102. Actions Deep links into your app ● “shortcuts with parameters” ● “a visible Intent” Define actions in actions.xml Register with App Indexing to show as on-device search results
- 103. Notifications People love messages …so we focused on MessagingStyle ● Inline images/stickers ● Participant images ● Smart reply UI ● RemoteInput.setChoices() And more!
- 104. What’s New In Android Android App Bundle https://g.co/androidappbundle Android Jetpack https://d.android.com/jetpack https://d.android.com/kotlin https://d.android.com/arch https://d.android.com/arch/navigation https://d.android.com/arch/workmanager Core Platform App Standby Buckets Background Restrictions System UI Display Cutouts Slices & Actions Notifications
- 105. Thank You!