Develop Apps Super fast with Android Jetpack!

Worried about writing tons of boilerplate code and managing tedious activities and tasks while writing Android apps? Well here comes Android Jetpack to the rescue.
Agenda: 1. A brief introduction about the four different Android Jetpack component categories -Foundation, Architecture,Behavior, UI. 2. Deep dive into the Android component libraries that are individually adoptable but work well together to develop robust and high quality apps with great user experience.

Transcript

1. Develop Apps Super fast with Android Jetpack! Divya Jain @divyajain2405 Valley Devfest 2018
2. Put the pieces of the puzzle together... To create something beautiful , user friendly & serves a purpose
3. Challenges in Android Dev • Tons of Boilerplate Code • Clean Architecture • Testing • Backward compatibility
4. Who wants to build robust high quality production ready apps in an accelerated manner?
6. Android Jetpack!
7. What is it? • Collection of individual software components - libraries and tools • Independently adoptable • Built to work together • Unbundled from Platform APIs
8. FOUNDATION AppCompat Android KTX Multidex Testing * Core System Components *Kotlin *Backward Compatibility *Testing Libraries
9. UI Layout Fragment Palette Emoji Animations and Transitions Auto TV Wear * Widgets and helpers *Easy to use *Enhanced User experience
10. ARCHITECTURE Lifecycles Livedata Paging Navigation WorkManager Room Viewmodel Data Binding *Clean & Recommended *Data Management *Robust, scalable & Maintainable
11. BEHAVIOUR Notifications Permissions Sharing Slices Media & Playback Download Manager * Integrate with other Android services *help interact with user
12. Foundation UI Architecture Behaviour Easier to Develop Follow Best Practices Reduces Boilerplate code Simplify tasks Reduces Memory crashes Lessens memory leaks
13. Concentrate on the nitty gritty of Android platform Focus on the Code you actually care about
14. AndroidX New improved Android Support Library with consistent Namespacing , faster updates , feature parity & new libraries androidx.* androidx.<feature>.ClassName androidx.<feature>:<feature>-<sub-feature>
15. Migrate to AndroidX gradle.properties file : Changes in Package and Maven Artifact names https://developer.android.com/jetpack/androidx/migrate
16. FOUNDATION AppCompat Android KTX Multidex Testing * Core System Components *Kotlin *Backward Compatibility *Testing Libraries
17. Android KTX Kotlin Extension Function Null Safety Default & named arguments Higher order functions Smart Cast Leverages Kotlin Features Optimizes Android APIs with Kotlin Makes Android Development - concise - enjoyable - intuitive
18. Android KTX Parse a string to a URI val uri = Uri.parse(custom_string) Val uri = custom_string.toUri() import android.view.Menu import androidx.core.view.get import androidx.core.view.minusAssign fun myFunction(menu : Menu) { val firstMenuItem = menu[0] //Gets the first menu item. menu -= firstMenuItem // Removes the menu item } Menu Class • Core KTX • Fragment KTX • Palette KTX • Collections KTX • SQLite KTX • Navigation KTX Build.gradle implementation "androidx.core:core-ktx:$androidx_version"
19. UI Layout Fragment Palette Emoji Animations and Transitions Auto TV Wear * Widgets and helpers *Easy to use *Enhanced User experience
20. Layout ViewGroup View View ViewGroup View View <androidx.constraintlayout.widget.ConstraintLayout android:id="@+id/root_view" android:layout_width="match_parent" android:layout_height="match_parent" android:paddingBottom="@dimen/margin">
21. Fragment • Dynamic and Flexible UI Designs • Support different screens • Reusable UI components 1. implementation 'androidx.fragment:fragment-ktx:$currentVersion' supportFragmentManager.transaction(now = false, allowStateLoss = false) { replace(R.id.frag_container, myFragment,FRAGMENT_TAG) }
22. Palette API 1. • Vibrant color schemes • Visually appealing • Pick and choose • Various layout themes fun createPaletteSync(bitmap: Bitmap): Palette = Palette.from(bitmap).generate() fun createPaletteAsync(bitmap: Bitmap) { Palette.from(bitmap).generate { palette -> // Use generated instance } }
23. Emoji Compat 1. • Device up to date with Latest • No need to wait for OS updates • Prevents showing missing ✋ • Identifies emoji for a given CharSequence, replaces them with EmojiSpan & renders ✅
24. Animations 1. Visual Cue to notify users of changes! • Informative • Focus • Expressive
25. ARCHITECTURE Lifecycles Livedata Paging Navigation WorkManager Room Viewmodel Data Binding *Clean & Recommended *Data Management *Robust, scalable & Maintainable
26. Architecture Components • Separation of concerns • Drive UI from model • Persistence of data • Independent testing
27. Paging ➔ Lazy Loading of Data ➔ Economical use of system resources ➔ Responsive to the user input without a lag DataSource DataSource Factory ViewModel PagedList PagedList Adapter
28. Navigation Cool way to storyboard the app destinations!
29. Navigation ❖ Actions ❖ Animations ❖ Up/Back Behavior ❖ Passing Arguments ❖ Deep Links
30. WorkManager Job Scheduler Alarm Manager Firebase JobDispatcher Asynchronous Task Constraints Work Request enqueues
31. Data Binding Bind UI elements to the data sources programmatically UI Framework methods findViewById() Bind UI elements to the data sources in a declarative format Remove UI Framework methods <TextView android:text="@{viewmodel.userName}" />
32. BEHAVIOUR Notifications Permissions Sharing Slices Media & Playback Download Manager * Integrate with other Android services *help interact with user
33. Want to download something? Download Manager • System service • Handles HTTP Downloads • Background • Handles interactions • Takes care of retrying Want to share something? ShareActionProvider • Menu item • Handles appearance & behaviour • Needs a share intent
34. Want to Notify user? NotificationCompat • Info to user outside App • Informative/action oriented • Timely reminders • Frequent interruptions are annoying Permissions <uses-permission> • Privacy of user • Permission to access sensitive user data • Dangerous permission on demand
35. Slices Embed App content in Google Search through flexible templates Templated Show relevant app content in a dynamic, app theme user interface Interactive Enable user to perform inline, app actions, deep link, update, toggle Modular
36. Valley Devfest 2018 App Data --------- --------- --------- --------- --------- ------- ----- User Interface Repository Model View ViewModel Livedata Room Fragments Animations Layouts Navigation Caching Notifications ShareActionProvider
37. Android Jetpack has all the pieces needed for putting together the app Choose and pick the ones you need, integrate App is Ready in no time!
38. https://developer.android.com/jetpack/
39. Thank you! Questions Please? Divya Jain @divyajain2405