What's New in Android - I/O Extended Yangon 2018

Talk from I/O Extended Yangon 2018.

1. What’s new in Android? Photo Ⓒ Rami Al-zayat
2. What’s new in Android P? Photo Ⓒ Lauren Robert
3. Notch Support Photo Ⓒ Google
4. Notch Support - DisplayCount class - getDisplayCutout() method - New window attribute, layoutInDisplayCutoutMode - LAYOUT_IN_DISPLAY_CUTOUT_MODE_DEFAULT - LAYOUT_IN_DISPLAY_CUTOUT_SHORT EDGES - LAYOUT_IN_DISPLAY_CUTOUT_MODE_NEVER
5. LAYOUT_IN_DISPLAY_CUTOUT_MODE_DEFAULT - The notch has to be contained in System Bar - If not, the window won’t overlap it
6. LAYOUT_IN_DISPLAY_CUTOUT_MODE_SHORT_EDGES - Can extends into notch - Developer has to handle drawing
7. LAYOUT_IN_DISPLAY_CUTOUT_MODE_NEVER - Will never overlaps
8. Notch Support if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.P) { val windowAttributes = window.attributes windowAttributes.layoutInDisplayCutoutMode = WindowManager.LayoutParams.LAYOUT_IN_DISPLAY_CUTOUT_MODE_DEFAULT }
9. Notification - Person API - Can now display Image - Reply drafts - Group conversations support - Semantic Action (Reply, Mark as read, thumbs up… etc.) - Smart Reply Photo Ⓒ Google
10. Notification // create new Person val sender = Person() .setName(name) .setUri(uri) .setIcon(null) .build() // create image message val message = Message("Picture", time, sender) .setData("image/";, imageUri) val style = Notification.MessagingStyle(getUser()) .addMessage("Check this out!", 0, sender) .addMessage(message)
11. Notification Channel - Can block entire “groups” of channel - Can check if blocked via isBlocked - New policies
12. TextView Photo Ⓒ Best practices for text on Android ( Google IO / 18 )
13. Photo Ⓒ Best practices for text on Android ( Google IO / 18 )
14. PreComputed Text // UI thread val params: PrecomputedText.Params = textView.getTextMetricsParams() val ref = WeakReference(textView) executor.execute { // background thread val text = PrecomputedText.create("Hello", params) val textView = ref.get() textView?.post { // UI thread val textViewRef = ref.get() textViewRef?.text = text } }
15. Magnifier
16. Magnifier fun onTouchEvent(event: MotionEvent): Boolean { when (event.actionMasked) { MotionEvent.ACTION_DOWN -> magnifier.show(event.x, event.y) MotionEvent.ACTION_MOVE -> magnifier.show(event.x, event.y) MotionEvent.ACTION_UP -> magnifier.dismiss() } }
17. Smart Linkify
18. Smart Linkify // UI thread val text: Spannable = ... val request = TextLinks.Request.Builder(text) val ref = WeakReference(textView) executor.execute { // background thread TextClassifier.generateLinks(request).apply(text) val textView = ref.get() textView?.post { // UI thread val textViewRef = ref.get() textViewRef?.text = text } }
19. Fingerprint Auth
20. And…. - Indoor positioning - Multi-camera support - ImageDecoder - AnimatedImageDrawable - Client side encryptions for backups - New accessibility features - Autofill improvements - And Many more!
21. What’s new in Android Support Library? Photo Ⓒ Leo Fosdal
22. Major Refactor android.support.v4.* android.support.v7.* android.support.v9.* android.support.v14.* …
23. Major Refactor android.support.* androidx.*
24. Major Refactor Available in Android Studio Canary Channel
25. Major Refactor https://developer.android.com/topic/libraries/support-library/refactor
26. Android KTX https://github.com/android/android-ktx
27. Android KTX sharedPreferences.edit { putBoolean("key", value) putLong("key2", value2) } val args = bundleOf { "key" to 1, "key2" to true }
28. Android JetPack https://developer.android.com/jetpack/
29. Slices - UI templates with interactive contents - Used in Google Search, Google Assistant
30. Slices fun createSliceWithGridRow(sliceUri: Uri): Slice { // Create the parent builder. return list(context, sliceUri, ListBuilder.INFINITY) { header { setTitle("Famous restaurants") setPrimaryAction(SliceAction(pendingIntent, icon, "Famous restaurants")) } gridRow { cell { addImage(image1, LARGE_IMAGE) addTitleText("Top Restaurant") addText("0.3 mil") setContentIntent(intent1) } cell { addImage(image2, LARGE_IMAGE) addTitleText("Fast and Casual") addText("0.5 mil") setContentIntent(intent2) } } } }
31. Actions - Can recommend actions to users - Increases discoverability
32. RecyclerView ListAdapter - Uses DiffUtils - Automatic Animation
33. class MovieRecyclerViewAdapter : ListAdapter<Movie, MovieViewHolder>() { } RecyclerView ListAdapter
34. RecyclerView ListAdapter companion object { private val MOVIE_DIFF_CALLBACK = object : DiffUtil.ItemCallback<Movie>() { override fun areItemsTheSame(item1: Movie, item2: Movie): Boolean { return item1.id == item2.id } override fun areContentsTheSame(item1: Movie, item2: Movie): Boolean { return item1 == item2 } } }
35. class MovieRecyclerViewAdapter : ListAdapter<Movie, MovieViewHolder>(MOVIE_DIFF_CALLBACK) { companion object { private val MOVIE_DIFF_CALLBACK = object : DiffUtil.ItemCallback<Movie>() { override fun areItemsTheSame(item1: Movie, item2: Movie): Boolean { return item1.id == item2.id } override fun areContentsTheSame(item1: Movie, item2: Movie): Boolean { return item1 == item2 } } } } RecyclerView ListAdapter
36. movieListLiveData.observe(this, Observer {itemList -> movieRecyclerViewAdapter.submitList(itemList) }) RecyclerView ListAdapter
37. RecyclerView Selection - Allow select/deselect multiple items in list SelectionTracker tracker = new SelectionTracker.Builder<>( "my-selection-id", recyclerView, new StableIdKeyProvider(recyclerView), new MyDetailsLookup(recyclerView), StorageStrategy.createLongStorage()) .build();
38. Material Components https://material.io/
39. BottomAppBar
40. BottomAppBar <android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" android:layout_width="match_parent" android:layout_height="match_parent"> <!-- Other components and views --> <com.google.android.material.bottomappbar.BottomAppBar android:id="@+id/bar" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_gravity="bottom" app:navigationIcon="@drawable/ic_menu_24"/> <com.google.android.material.floatingactionbutton.FloatingActionButton android:id="@+id/fab" android:layout_width="wrap_content" android:layout_height="wrap_content" app:layout_anchor="@id/bar"/> </android.support.design.widget.CoordinatorLayout>
41. MaterialButton
42. MaterialButton <com.google.android.material.button.MaterialButton android:id="@+id/material_button" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="@string/button_label_enabled"/>
43. MaterialCardView
44. MaterialCardView <com.google.android.material.card.MaterialCardView style="@style/Widget.MaterialComponents.CardView" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginLeft="@dimen/mtrl_card_spacing" android:layout_marginTop="@dimen/mtrl_card_spacing" android:layout_marginRight="@dimen/mtrl_card_spacing" android:minHeight="200dp"> <!-- Card contents. --> </com.google.android.material.card.MaterialCardView>
45. Chips
46. Chips <com.google.android.material.chip.Chip android:layout_width="wrap_content" android:layout_height="wrap_content" app:chipText="@string/hello_world"/> style="@style/Widget.MaterialComponents.Chip.Entry" style="@style/Widget.MaterialComponents.Chip.Filter" style="@style/Widget.MaterialComponents.Chip.Choice"
47. Chips <com.google.android.material.chip.ChipGroup android:layout_width="match_parent" android:layout_height="wrap_content"> <!-- Chips can be declared here, or added dynamically. --> </com.google.android.material.chip.ChipGroup>
48. Android Arch Components - Paging Library - WorkManager - Navigation
49. - Use for enqueuing background works - JobScheduler for API 23+ - Firebase JobDispatcher (or) custom AlarmManager + Broadcast Receiver for backport WorkManager
50. val workManager = WorkManager.getInstance() val workRequest = OneTimeWorkRequest.Builder(SyncWorker::class.java).build() workManager.enqueue(workRequest) WorkManager
51. val workManager = WorkManager.getInstance() val workConstraints = Constraints.Builder() .setRequiredNetworkType(NetworkType.METERED) .setRequiresCharging(true) .setRequiresStorageNotLow(false) .build() val workRequest = OneTimeWorkRequest.Builder(SyncWorker::class.java) .setConstraints(workConstraints) .build() workManager.enqueue(workRequest) WorkManager
52. val workManager = WorkManager.getInstance() val workRequest = OneTimeWorkRequest.Builder(SyncWorker::class.java).build() workManager.enqueue(workRequest) WorkManager
53. val workManager = WorkManager.getInstance() val workRequest = OneTimeWorkRequest.Builder(SyncWorker::class.java).build() workManager.enqueue(workRequest) val workStatusLiveData = workManager.getStatusById(workRequest.id) workStatusLiveData.observe(this, Observer { workStatus -> when (workStatus?.state) { State.ENQUEUED -> TODO() State.RUNNING -> TODO() State.SUCCEEDED -> TODO() State.FAILED -> TODO() State.BLOCKED -> TODO() State.CANCELLED -> TODO() } }) WorkManager
54. val workManager = WorkManager.getInstance() val workRequest = OneTimeWorkRequest.Builder(SyncWorker::class.java).build() workManager.enqueue(workRequest) workManager.cancelWorkById(workRequest.id) WorkManager
55. WorkManager val workManager = WorkManager.getInstance() val request1 = OneTimeWorkRequest.Builder(FooWorker::class.java).build() val request2 = OneTimeWorkRequest.Builder(BarWorker::class.java).build() val request3 = OneTimeWorkRequest.Builder(BazWorker::class.java).build() workManager.beginWith(request1, request2).then(request3).enqueue()
56. Navigation Arch Component - Single Activity, Multiple Fragment - Uses “Stack”, last-in first out structure - Deep Link has same stack
57. Navigation Arch Component
58. Navigation Arch Component <?xml version="1.0" encoding="utf-8"?> <navigation xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools" xmlns:android="http://schemas.android.com/apk/res/android" app:startDestination=“@id/blankFragment"> <fragment android:id="@+id/blankFragment" android:name="com.example.cashdog.cashdog.BlankFragment" android:label="fragment_blank" tools:layout="@layout/fragment_blank" /> <fragment android:id="@+id/blankFragment2" android:name="com.example.cashdog.cashdog.BlankFragment2" android:label="Blank2" tools:layout="@layout/fragment_blank_fragment2" /> </navigation>
59. Navigation Arch Component <?xml version="1.0" encoding="utf-8"?> <navigation xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools" xmlns:android="http://schemas.android.com/apk/res/android" app:startDestination=“@id/blankFragment"> <fragment android:id="@+id/blankFragment" android:name="com.example.cashdog.cashdog.BlankFragment" android:label="fragment_blank" tools:layout="@layout/fragment_blank" > <action android:id="@+id/action_blankFragment_to_blankFragment2" app:destination="@id/blankFragment2" /> </fragment> <fragment android:id="@+id/blankFragment2" android:name="com.example.cashdog.cashdog.BlankFragment2" android:label="fragment_blank_fragment2" tools:layout="@layout/fragment_blank_fragment2" /> </navigation>
60. Navigation Arch Component ?xml version="1.0" encoding="utf-8"?> <android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" tools:context=".MainActivity"> <fragment android:layout_width="match_parent" android:layout_height="match_parent" android:id="@+id/my_nav_host_fragment" android:name="androidx.navigation.fragment.NavHostFragment" app:navGraph="@navigation/nav_graph" app:defaultNavHost="true" /> </android.support.constraint.ConstraintLayout>
61. Navigation Arch Component override fun onSupportNavigateUp() = findNavController(R.id.nav_host_fragment).navigateUp()
62. Navigation Arch Component button.setOnClickListener( Navigation.createNavigateOnClickListener(R.id.next_fragment, null) )
63. <fragment android:id="@+id/details_page_fragment" android:label="@string/details" android:name="com.example.android.myapp.DetailsFragment" /> Navigation Arch Component - NavigationView(Drawer)
64. <fragment android:id="@+id/details_page_fragment" android:label="@string/details" android:name="com.example.android.myapp.DetailsFragment" /> <item android:id="@id/details_page_fragment" android:icon="@drawable/ic_details" android:title="@string/details" /> Navigation Arch Component - NavigationView(Drawer)
65. <fragment android:id="@+id/details_page_fragment" android:label="@string/details" android:name="com.example.android.myapp.DetailsFragment" /> <item android:id="@id/details_page_fragment" android:icon="@drawable/ic_details" android:title="@string/details" /> val navController = Navigation.findNavController(this, R.id.nav_host_fragment) val navigationView = findViewById<NavigationView>(R.id.nav_view) navigationView.setupWithNavController(navController) Navigation Arch Component - NavigationView(Drawer)
66. Navigation Arch Component - Arguments <fragment android:id="@+id/confirmationFragment" android:name="com.example.cashdog.cashdog.ConfirmationFragment" android:label="fragment_confirmation" tools:layout="@layout/fragment_confirmation"> <argument android:name="amount" android:defaultValue=”0” />
67. Navigation Arch Component - Arguments <fragment android:id="@+id/confirmationFragment" android:name="com.example.cashdog.cashdog.ConfirmationFragment" android:label="fragment_confirmation" tools:layout="@layout/fragment_confirmation"> <argument android:name="amount" android:defaultValue=”0” /> var bundle = bundleOf("amount" to amount) view.findNavController().navigate(R.id.confirmationAction, bundle)
68. Navigation Arch Component - Arguments <fragment android:id="@+id/confirmationFragment" android:name="com.example.cashdog.cashdog.ConfirmationFragment" android:label="fragment_confirmation" tools:layout="@layout/fragment_confirmation"> <argument android:name="amount" android:defaultValue=”0” /> var bundle = bundleOf("amount" to amount) view.findNavController().navigate(R.id.confirmationAction, bundle) val tv = view.findViewById(R.id.textViewAmount) tv.text = arguments.getString("amount")
69. Navigation Arch Component - Safe Args apply plugin: 'com.android.application' apply plugin: 'androidx.navigation.safeargs' android { //... }
70. Navigation Arch Component - Safe Args <fragment android:id="@+id/confirmationFragment" android:name="com.example.buybuddy.buybuddy.ConfirmationFragment" android:label="fragment_confirmation" tools:layout="@layout/fragment_confirmation"> <argument android:name="amount" android:defaultValue="1" app:type="integer"/> </fragment>
71. Navigation Arch Component - Safe Args <fragment android:id="@+id/specifyAmountFragment" android:name="com.example.buybuddy.buybuddy.SpecifyAmountFragment" android:label="fragment_specify_amount" tools:layout="@layout/fragment_blank" > <action android:id="@+id/action_specify_to_confirm" app:destination="@id/confirmationFragment" /> </fragment> <fragment android:id="@+id/confirmationFragment" android:name="com.example.buybuddy.buybuddy.ConfirmationFragment" android:label="fragment_confirmation" tools:layout="@layout/fragment_confirmation"> <argument android:name="amount" android:defaultValue="1" app:type="integer"/ > </fragment>
72. Navigation Arch Component - Safe Args override fun onClick(v: View?) { val amount = 100 val action = SpecifyAmountFragmentDirections.confirmationAction(amount) v.findNavController().navigate(action) }
73. Navigation Arch Component - Safe Args override fun onClick(v: View?) { val amount = 100 val action = SpecifyAmountFragmentDirections.confirmationAction(amount) v.findNavController().navigate(action) } override fun onViewCreated(view: View, savedInstanceState: Bundle?) { val tv: TextView = view.findViewById(R.id.textViewAmount) val amount = ConfirmationFragmentArgs.fromBundle(arguments).amount tv.text = amount.toString() }
74. https://github.com/googlesamples/android-sunflower
75. ConstraintLayout 1.1 - Barrier - Group - Circular constraints - Chains - Constraint set
76. ConstraintLayout 2.0 - ConstraintProperties - MotionLayout - Better Optimizers
77. - Kotlin Support - New APIs Testing
78. - Kotlin Support - New APIs assertEquals(view.visibility, View.VISIBLE) Testing
79. - Kotlin Support - New APIs assertEquals(view.visibility, View.VISIBLE) “Failed Expected 0 but was 16” Testing
80. - Kotlin Support - New APIs assertEquals(view.visibility, View.VISIBLE) Testing
81. - Kotlin Support - New APIs assertThat(view).isVisible() Testing
82. - Kotlin Support - New APIs assertThat(view).isVisible() “Failed, view was not visible” Testing
83. Testing - Roboelectric to be packaged inside androidx.test - Roboelectric semantics will be same as Espresso http://robolectric.org/blog/2018/05/09/robolectric-4-0-alpha/
84. Testing - Roboelectric to be packaged inside androidx.test - Roboelectric semantics will be same as Espresso - Will be able to run UI test in local JVM http://robolectric.org/blog/2018/05/09/robolectric-4-0-alpha/
85. Project Nitrogen
86. What’s new in Android Development Tools? Photo Ⓒ Fleur Treurniet
87. App Bundle - A new publishing format, instead of APK - Minimized APK depends on user’s device - Deliver downloadable “dynamic feature”
88. D8 - New dex-ing tool - Default already on Android Studio 3.1 - Manually turn on by adding android.enableD8=true in gradle.properties
89. R8 - Better Proguard - Can include proguard rules in java library module by placing inside “META-INF/proguard”
90. Emulator - Saving states (Cold boot / Hot boot) - AMD CPU support - Notch emulation - Sceneform emulation
91. Android Studio Canary - Navigation Arch Component Support - MotionLayout Support - Better Profiler - WebP support
92. Android Studio on ChromeOS
93. Play Store - Digital Rights Management(DRM) metadata - App now have to be complaint with GDPR - Algorithm changes - Must have minimum API level 26 by end of August 2018
94. Q & A