Downloaded 17 times
![NewsListAdaptor.kt
init {
setHasStableIds(true)
}
override fun getItemId(position: Int): Long =
items[position].id.toLong()
override fun onBindViewHolder(holder: NewsViewHolder, position: Int) {
holder.bind(items[position])
holder.setSelected(selectionTracker?.isSelected(item.id.toLong()))
}](https://image.slidesharecdn.com/androidxgooglei2foextendedbkk2018-180706041329/85/AndroidX-Google-Extended-I-O-BKK-2018-51-320.jpg)
![KOTLIN KOTLIN + ANDROID KTX
for (i in 0..view.childCount) {
doSomething(i, view[i])
}
view.children.forEachIndexed {
i, v -> doSomething(i, v)
}](https://image.slidesharecdn.com/androidxgooglei2foextendedbkk2018-180706041329/85/AndroidX-Google-Extended-I-O-BKK-2018-68-320.jpg)
AndroidX Google Extended I/O BKK 2018
- 2. Theerasan Tonthongkam -Ta Android Jetpack AndroidX
- 3. What is AndroidX Whatnormal people think? What am I think about?
- 4.
- 5. What is AndroidJetpack? Accelerate development Eliminate boilerplate code Build high quality, robust apps
- 6. Android Jetpack ● Guidance ●Recommendation & Tools ● How to make a good App AndroidX ● Library ● Technical guarantees versioning/ naming
- 8. build.gradle dependencies { // Slice implementation'androidx.slice:slice-core:1.0.0-alpha3' implementation 'androidx.slice:slice-builders:1.0.0-alpha3' // KTX implementation 'androidx.core:core-ktx:1.0.0-alpha3' }
- 9. Behind the scene ofAndroidX
- 10. Mismatched artifact/ package nameis weird, could be confusing. “ “
- 11. Developer have tounderstand the legacy of Support Library .../ not great. “ “
- 12. Have to updateversion of Support Library, but nothing new. “ “
- 13. 2011 Support-v4 (sdk 4) Watchcomponents Car components TV components Testing components More...
- 14. - com.android.support + support-v4 +support-v13 + appcompat-v7 + cardview-v7 + coordinatorlayout + … + … + … + … + more
- 15. - com.android.support + support-v4 +support-v13 + appcompat-v7 + preference-v14 + recyclerview-v7 + gridlayout-v7 + palette-v7 + … Min SDK version 14 - com.android.support + support-v4 + support-v13 + appcompat-v7 + preference-v14 + recyclerview-v7 + gridlayout-v7 + palette-v7 + …
- 16. What is inSupport V-13?
- 17.
- 18. support-v13 support-v4 component 1 component2 component … component n
- 19.
- 20. Why it hasweird naming? ● Create for long time ago ● Hard to fix--legacy code ● All support version have to be the same dependencies { implementation ‘com.android.support:animated-vector-drawable:27.0.2’ implementation ‘com.android.support:customtabs:26.1.0’ }
- 21. Hint error message Allcom.android.support libraries must use the exact same version specification (mixing versions can lead to runtime crashes). Found versions 27.0.2, 26.1.0. Examples include com.android.support:animated-vector-drawable:27.0.2 and com.android.support:customtabs:26.1.0 there are some combinations of libraries, or tools and libraries, that are incompatible, or can lead to bugs. One such incompatibility is compiling with a version of the Android support libraries that is not the latest version (or in particular, a version lower than your targetSdkVersion.)
- 22. Big refactoring Support Libraryto AndroidX
- 23.
- 24.
- 25. Artifacts ● More logical ●Finer-grain-artifact ● Clearer scope support library import android.support.v7.widget.RecyclerView androidx import androidx.recyclerview.widget.RecyclerView Umbrella effect
- 26.
- 27. Finer scope Clearer andpattern adroidx.<feature>:classname adroidx.<feature>:<feature>-<subfeature> dependencies { implementation 'androidx.recyclerview:recyclerview:1.0.0-alpha3' implementation 'androidx.recyclerview:recyclerview-selection:1.0.0-alpha3' }
- 28. V-4 V-7 V-13V-14
- 29. Migration tools Android Studio3.2 canary 15+
- 33.
- 36. Migrate tools bug Somemethod signature are changed
- 39. Migrate tools bug Usefull path instead of class name + import
- 40.
- 41. Jetifier Jetifier is releasedwhich will perform refactoring task inside jar/aar file
- 42.
- 43. AndroidX & Support28.0.0 ● AndroidX is included in Support Library 28.0.0 ● No new feature in Support Library 28.0.0
- 44.
- 45. What’s new inAndroidX 3 cool features RecyclerView selection Slice Android KTX more...
- 46.
- 47. RecyclerView Selection ● Touch andmouse-driven ● Preserves state between Activity lifecycle events ● Fine-grained-control
- 48. build.gradle dependencies { implementation 'androidx.recyclerview:recyclerview:1.0.0-alpha3' implementation'androidx.recyclerview:recyclerview-selection:1.0.0-alpha3' }
- 49. NewsListView.kt with(binding.list) { adapter =NewsListAdapter(binding.viewModel!!) val stableIdKeyProvider = StableIdKeyProvider(this) val selectionTracker = SelectionTracker.Builder<Long>( "news-selection", this, stableIdKeyProvider, MyItemsLookUp(this, binding.viewModel!!), StorageStrategy.createLongStorage()) .build() (adapter as NewsListAdapter).selectionTracker = selectionTracker }
- 50. class MyItemsLookUp(private valrecyclerView: RecyclerView) : ItemDetailsLookup<Long>() { override fun getItemDetails(event: MotionEvent): ItemDetails<Long?>? { val view = recyclerView.findChildViewUnder(event.x, event.y) if (view != null) { val viewHolder = recyclerView.getChildViewHolder(view) if (viewHolder is NewsListAdapter.NewsViewHolder) { return object : ItemDetails<Long?>() { override fun getSelectionKey(): Long? = viewHolder.itemId override fun getPosition(): Int = viewHolder.adapterPosition } } return null } }
- 51. NewsListAdaptor.kt init { setHasStableIds(true) } override fungetItemId(position: Int): Long = items[position].id.toLong() override fun onBindViewHolder(holder: NewsViewHolder, position: Int) { holder.bind(items[position]) holder.setSelected(selectionTracker?.isSelected(item.id.toLong())) }
- 52. bg_selection.xml <selector xmlns:android="http://schemas.android.com/apk/res/android"> <item android:state_selected="true" android:drawable="@color/selectedBackground"/> </selector> item_news.xml <LinearLayout android:id="@+id/wrapper" android:background="@drawable/bg_selection"
- 54. Slice ● Slice provider ●Slice template ● Let you app show on Google App & Google Assistant
- 56.
- 57. build.gradle dependencies { implementation 'androidx.slice:slice-core:1.0.0-alpha3' implementation'androidx.slice:slice-builders:1.0.0-alpha3' }
- 58. AndroidManifest.xml <provider android:name=".slice.NewsSlice" android:authorities="news.ta.com.news" android:exported="true"> <intent-filter> <action android:name="android.intent.action.VIEW" /> <categoryandroid:name="android.app.slice.category.SLICE" /> <data android:host="news.ta.com.news" android:pathPrefix="/newsslice" android:scheme="http" /> </intent-filter> </provider>
- 59. NewsSlice.kt override fun onBindSlice(sliceUri:Uri): Slice? { return if (sliceUri.path == "/newsslice" && NewsApplication.news != null) { ListBuilder(context, sliceUri) .addRow { it.setTitle(NewsApplication.news!!.headline) it.setSubtitle(NewsApplication.news!!.description) it.setPrimaryAction(openTempActivity) } .build() } else { //do something } }
- 62.
- 63. Android KTX Write moreconcise, idiomatic Kotlin code dependencies { implementation 'androidx.core:core-ktx:1.0.0-alpha3' }
- 65. KOTLIN KOTLIN +ANDROID KTX sharedPreferences.edit() .putBoolean("key", value) .apply() sharedPreferences.edit { putBoolean("key", value) }
- 66. KOTLIN KOTLIN +ANDROID KTX db.beginTransaction() try { // insert data db.setTransactionSuccessful() } finally { db.endTransaction() } db.transaction { // insert data }
- 67. KOTLIN KOTLIN +ANDROID KTX val uri = Uri.parse(myUriString) val uri = myUriString.toUri()
- 68. KOTLIN KOTLIN +ANDROID KTX for (i in 0..view.childCount) { doSomething(i, view[i]) } view.children.forEachIndexed { i, v -> doSomething(i, v) }
- 69. More ● HEIF Writerprovides support for writing HEIF-format still images. (High Efficiency Image File Format) ● Design Library Theme.MaterialComponents ● Browser actions provides a protocol for app developers to launch a consistent ● ListAdapter for RecyclerView (along with AsyncListDiffer) ● SortedList.ReplaceAll ● https://goo.gl/vrDRXy
- 70.
- 71.
- 72.
- 73. AndroidX ● Big refactorfrom Support Library ● Artficats, Naming, Package ● Technical gaurantee ● Some features in Jetpack ● More cool features will make you life easier
- 74. Question? Current job openings ●Frontend Developer - Singapore ● Backend Developer - Singapore ● Android developer - Bangkok ● iOS developer - Bangkok Forward your CV: sarah@eatigo.com jutamat@eatigo.com
- 75. Thank you Theerasan Tonthongkam- Ta https://goo.gl/gZYbHJ https://medium.com/ta-tonthongkam Helpful resources @IhazardTa