Android Jetpack Joyride

It includes four components of Android Jetpacks. It includes Room, Paging Library, WorkManager, Palette, Slice etc.

Transcript

1. Krunal Kapadiya Volansys @krunal3kapadiya Gandhinagar Android Jetpack Joyride
3. What is Android Jetpack AJ Gandhinagar
4. What is Jetpack Jetpack is a collection of Android software components to make it easier for you to develop great Android apps
5. Source: d.android.com/jetpack Who uses Jetpack smartly
6. Benefits of Jetpack d.android.com/jetpack Gandhinagar - Accelerate development - Eliminate boilerplate code - Build high quality, robust apps
8. Data Binding Life Cycles LiveData Navigation Paging Room ViewModel WorkManager AppCompat Android KTX Multidex Test Animations & Transitions Auto TV & Wear Emoji Fragment Layout Palette Download Manager Media & Playback Permissions Notifications Sharing Slices
9. Gandhinagar
10. Navigation
11. Navigation
12. Let’s start with code
13. //app.gradle dependencies { implementation 'android.arch.navigation:navigation-fragment-ktx:1.0.0-alpha06' implementation 'android.arch.navigation:navigation-ui-ktx:1.0.0-alpha06' } Navigation
14. //activity_main.xml <?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:id="@+id/my_nav_host_fragment" android:name="androidx.navigation.fragment.NavHostFragment" android:layout_width="match_parent" android:layout_height="match_parent" app:defaultNavHost="true" app:navGraph="@navigation/nav_graph" /> </android.support.constraint.ConstraintLayout> Navigation
15. Navigation //MainActivity.kt myButton.setOnClickListener { view.findNavController().navigate(R.id.action_first_to_second) }
16. Navigation //nav_graph.xml <?xml version="1.0" encoding="utf-8"?> <navigation xmlns:android="http://schemas.android.com/apk/res/android"> </navigation>
17. Navigation
18. Navigation enterAnim: the animation for the target fragment/activity when we navigate to it exitAnim: the animation for the source fragment/activity when we navigate away from it popEnterAnim: the animation for the target fragment/activity when we press back popExitAnim: the animation for the source fragment/activity when we press back
19. End Main components of Room
20. Let’s start with code
21. //app.gradle implementation "android.arch.persistence.room:runtime:1.1.1" annotationProcessor "android.arch.persistence.room:compiler:1.1.1" // Lifecyles, LiveData and ViewModel implementation "android.arch.lifecycle:runtime:1.1.1" implementation "android.arch.lifecycle:extensions:1.1.1" annotationProcessor "android.arch.lifecycle:compiler:1.1.1" Room //Movie.kt @Entity(tableName = TABLE_MOVIE) data class Movie(@PrimaryKey val id: Long, val title: String, val popularity: Int, val voteAverage: Int, val posterUrl: String, val description: String)
22. //MoviesDao @Dao interface MoviesDao { @Insert(onConflict = OnConflictStrategy.REPLACE) fun insert(movieList: List<Movie>) @Query(SELECT_MOVIE) fun allMovies(): DataSource.Factory<Int, Movie> } Room
23. //MoviesDatabase @Database(entities = [Movie::class], version = DATABASE_MOVIE_VERSION) abstract class MoviesDatabase : RoomDatabase() { abstract fun movieDao(): MoviesDao companion object { @Volatile private var INSTANCE: MoviesDatabase? = null fun getInstance(context: Context): MoviesDatabase = INSTANCE ?: synchronized(this) { INSTANCE ?: buildMoviesDatabase(context).also { INSTANCE = it } } private fun buildMoviesDatabase(context: Context) = Room.databaseBuilder(context,MoviesDatabase::class.java, DATABASE_MOVIE) .build() } } Room
24. Main components of Paging
25. Let’s start with code
26. //MoviesRepository fun fetchOrGetMovies() : Observable<PagedList<Movie>> = RxPagedListBuilder (moviesRoomDataSource.getMovies(), PAGE_SIZE) .setBoundaryCallback(PageListMovieBoundaryCallback( moviesRemoteDataSource, moviesRoomDataSource)) .buildObservable() Paging
27. //MoviesViewModel class MoviesViewModel(private val moviesRepository: MoviesRepository) : ViewModel() { private val compositeDisposable = CompositeDisposable() var pagedListMovie = MutableLiveData<PagedList<Movie>>() fun getMovies() { compositeDisposable.add(moviesRepository.fetchOrGetMovies() .subscribe({ pagedListMovie.value = it }, { it.printStackTrace() })) } override fun onCleared() { super.onCleared() compositeDisposable.dispose() } } Paging
28. Paging //MainActivity.kt view!!.findViewById<RecyclerView>(R.id.movies_recycler).adapter = moviePagedListAdapter moviesViewModel.pagedListMovie.observe(this, Observer<PagedList<Movie>> { moviePagedListAdapter.submitList(it) })
29. Paging
30. End d.android.com/guide/background WorkManager
31. Let’s start with code
32. // creating instance WorkManager workManager = WorkManager.getInstance(); WorkManager // how to use it WorkRequest request = new OneTimeWorkRequest.Builder(FooWorker.class).build(); workManager.enqueue(request); LiveData<WorkStatus> status = workManager.getStatusByIdLiveData(request.getId()); status.observe(...); //How to cancel workManager.cancelWorkById(request.getId()); // Can also add chain WorkRequest request1 = new OneTimeWorkRequest.Builder(FooWorker.class).build(); WorkRequest request2 = new OneTimeWorkRequest.Builder(BarWorker.class).build(); WorkRequest request3 = new OneTimeWorkRequest.Builder(BazWorker.class).build(); workManager.beginWith(request1, request2).then(request3).enqueue();
33. WorkManager PeriodicWorkRequest OneTimeWorkRequestBuilder WorkContinuation Constraints
34. Architecture http://d.android.com/arch - Navigations - Room - Paging - WorkManger
35. Gandhinagar
36. End Palette
37. Let’s start with code
38. Palette //App gradle implementation 'com.android.support:palette-v7:28.0.0' // Our class // Generate palette synchronously and return it fun createPaletteSync(bitmap: Bitmap): Palette = Palette.from(bitmap).generate() // Generate palette asynchronously and use it on a different // thread using onGenerated() fun createPaletteAsync(bitmap: Bitmap) { Palette.from(bitmap).generate { palette -> // Use generated instance } }
39. UI - Palette
40. Gandhinagar
41. Slices A “slice” is a way to surface your app’s UI inside of the Google Assistant as a result of a search. Some advantages using Slices API: - Templated - Interactive
42. Slices Slices
43. Let’s start with code
44. Slices //app.gradle implementation 'androidx.slice:slice-core:1.0.0' implementation 'androidx.slice:slice-builders:1.0.0'
45. Slices //MySliceProvider.java public class MySliceProvider extends SliceProvider { @Override public boolean onCreateSliceProvider() { return true; } public Slice onBindSlice(Uri sliceUri) { switch(sliceUri.getPath()) { case "/temperature": return createTemperatureSlice(sliceUri); } return null; } @Nullable private Slice createTemperatureSlice(Uri sliceUri) { // TODO: complete in a later step. return null; } }
46. Slices //manifest.xml <application ... <!-- To provide slices you must define a slice provider --> <provider android:authorities="com.android.example.slicecodelab" android:name=".MySliceProvider" android:exported="true"> </provider> ... </application>
47. Slices //MySliceProvider.java private Slice createTemperatureSlice(Uri sliceUri) { // Construct our parent builder ListBuilder listBuilder = new ListBuilder(getContext(), sliceUri, ListBuilder.INFINITY); // Construct the builder for the row ListBuilder.RowBuilder temperatureRow = new ListBuilder.RowBuilder(listBuilder); // Set title temperatureRow.setTitle(MainActivity.getTemperatureString(getContext())); // TODO: add actions to row; in later step // Add the row to the parent builder listBuilder.addRow(temperatureRow); // Build the slice return listBuilder.build(); }
48. Make interactive slices //MySliceProvider.java SliceAction tempUp = new SliceAction(getChangeTempIntent(MainActivity.sTemperature + 1), IconCompat.createWithResource(getContext(), R.drawable.ic_temp_up), "Increase temperature"); SliceAction tempDown = new SliceAction(getChangeTempIntent(MainActivity.sTemperature - 1), IconCompat.createWithResource(getContext(), R.drawable.ic_temp_down), "Decrease temperature");
49. Behaviour Slices
50. Gandhinagar
51. Android KTX And last but not least, one goal of Android Jetpack takes advantage of Kotlin language features that make you more productive.
52. Let’s start with code
53. Android KTX view.viewTreeObserver.addOnPreDrawListener( object : ViewTreeObserver.OnPreDrawListener { override fun onPreDraw(): Boolean { viewTreeObserver.removeOnPreDrawListener(this) actionToBeTriggered() return true } });
54. Android KTX view.doOnPreDraw{actionToBeTriggered()}
55. Foundation Android KTX
56. Q&A Gandhinagar
57. Gandhinagar Thank you! Krunal Kapadiya Volansys @krunal3kapadiya