GDGSurat Presentation

Transcript

1. Hardi Patel Volansys @hardypatel30 Android Jetpack Joyride
3. What is Android Jetpack AJ Surat
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 - Accelerate development - Eliminate boilerplate code - Build high quality, robust apps
7. 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
8. Surat
9. Navigation
10. Navigation
11. Let’s start with code
12. //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
13. //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
14. Navigation //MainActivity.kt myButton.setOnClickListener { view.findNavController().navigate(R.id.action_first_to_second) }
15. Navigation //nav_graph.xml <?xml version="1.0" encoding="utf-8"?> <navigation xmlns:android="http://schemas.android.com/apk/res/android"> </navigation>
16. Navigation
17. End Main components of Room
18. Let’s start with code
19. //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)
20. //MoviesDao @Dao interface MoviesDao { @Insert(onConflict = OnConflictStrategy.REPLACE) fun insert(movieList: List<Movie>) @Query(SELECT_MOVIE) fun allMovies(): DataSource.Factory<Int, Movie> } Room
21. //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
22. Main components of Paging
23. Let’s start with code
24. //MoviesRepository fun fetchOrGetMovies() : Observable<PagedList<Movie>> = RxPagedListBuilder (moviesRoomDataSource.getMovies(), PAGE_SIZE) .setBoundaryCallback(PageListMovieBoundaryCallback( moviesRemoteDataSource, moviesRoomDataSource)) .buildObservable() Paging
25. //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
26. Paging //MainActivity.kt view!!.findViewById<RecyclerView>(R.id.movies_recycler).adapter = moviePagedListAdapter moviesViewModel.pagedListMovie.observe(this, Observer<PagedList<Movie>> { moviePagedListAdapter.submitList(it) })
27. Paging
28. End d.android.com/guide/background WorkManager
29. Let’s start with code
30. // 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();
31. WorkManager PeriodicWorkRequest OneTimeWorkRequestBuilder WorkContinuation Constraints
32. Architecture http://d.android.com/arch - Navigations - Room - Paging - WorkManger
33. Surat
34. Surat
35. 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
36. Slices Slices
37. Let’s start with code
38. Slices //app.gradle implementation 'androidx.slice:slice-core:1.0.0' implementation 'androidx.slice:slice-builders:1.0.0'
39. 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; } }
40. 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>
41. 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(); }
42. 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");
43. Behaviour Slices
44. Surat
45. Android KTX And last but not least, one goal of Android Jetpack takes advantage of Kotlin language features that make you more productive.
46. Let’s start with code
47. Android KTX view.viewTreeObserver.addOnPreDrawListener( object : ViewTreeObserver.OnPreDrawListener { override fun onPreDraw(): Boolean { viewTreeObserver.removeOnPreDrawListener(this) actionToBeTriggered() return true } });
48. Android KTX view.doOnPreDraw{actionToBeTriggered()}
49. Foundation Android KTX
50. Surat Thank you! Hardi Patel Volansys @hardypatel30