※다운로드하시면 더 선명한 자료를 보실 수 있습니다. 벅스 Android 5.0에 Kotlin, Jetpack을 적용하면서 얻은 노하우와 시행착오를 공유합니다. 목차 1. 소개 2. Java to Kotlin 3. AAC (Android Architecture Components) 4. 미디어 앱 아키텍처(Media app architecture) 대상 - Kotlin과 Jetpack을 서비스에 적용하려는 Android 개발자 - 관련 Android 기술에 관심 있는 누구나 ■관련 동영상: https://youtu.be/PqsjZn30XGE

17. <layout xmlns:android="http://schemas.android.com/apk/res/an
droid" >
<data>
<import type="android.view.View" />
<variable
name="viewmodel"
type="com.android.bugs.ExampleModel" />
</data>
<FrameLayout
android:id=”@+id/setting_container"
android:visibility="@{viewmodel.show ? View.VISIBLE :
View.GONE}"
android:onClick="@{(v) -> viewmodel.onItemClick(v)}"/>
</FrameLayout>
</layout>
@Override
protected void executeBindings() {
.
.
this.settingContainer.setOnClickListener(mCa
llback58);
.
.
.
this.settingContainer.setVisibility(viewmode
lIsSettingContainerViewVISIBLEViewGONE);
.
.
}
Fragment_alarm_setting.xml FragmentAlarmSettingBindingImpl.java

19. UPDATE
DRAW
UPDATE
DRAW
UPDATE
DRAW
UPDATE
DRAW
26 ms UPDATE
Frame
Drop
DRAW

20. FrameHandler
Binding
Draw
postFrameCallback
postCallback

22. <ImageView
android:id="@+id/img_play"
android:layout_width="wrap_content"
android:layout_height="wrap_content”
android:src="@drawable/selector_list_btn_play"
android:visibility ="@{viewmodel.showPlay ? View.VISIBLE : View.GONE}" />

24. <ImageView
android:id="@+id/img_play"
android:layout_width="wrap_content"
android:layout_height="wrap_content”
android:src="@drawable/selector_list_btn_play"
android:visibility ="@{viewmodel.showPlay ? View.VISIBLE : View.GONE , default = gone}" />

28. var dataList: LiveData<PagedList<BaseRecyclerModel>>
init {
val testDataSourceFactory = TestDataSourceFactory(context)
val config = PagedList.Config.Builder()
.setPageSize(100)
.setPrefetchDistance(10)
.setInitialLoadSizeHint(100)
.setEnablePlaceholders(true)
.build()
dataList = LivePagedListBuilder<Int, BaseRecyclerModel>(testDataSourceFactory, config).build()
}

32. @BindingAdapter("app:set_list")
fun setList(recyclerView: RecyclerView ,
list: ArrayList<BaseRecyclerModel>)
{
val adapter = recyclerView.adapter
adapter.setList(list)
}
val items = ObservableArrayList()

41. class HomeFragment {
private lateinit var homeViewModel: HomeViewModel
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
homeViewModel= HomeViewModel()
homeViewModel.loadData()
}
}

42. class HomeFragment {
private lateinit var homeViewModel: HomeViewModel
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
val factory = ViewModelProvider
.AndroidViewModelFactory
.getInstance(application)
homeViewModel = ViewModelProvider(this,factory)
.get(HomeViewModel::class.java)
homeViewModel.loadData()
}
}

45. public class BugsApplication extends MultiDexApplication {
@Override
public void onCreate() {
super.onCreate();
registerActivityLifecycleCallbacks(new BugsActivityLifeCycleCallbacks());
}
}

46. public class BugsActivityLifeCycleCallbacks implements
Application.ActivityLifecycleCallbacks {
private int runningCount; // 실행중인 액티비티 수
@Override
public void onActivityStarted(Activity activity) {
runningCount++;
if(runningCount == 1) {
// 포그라운드 stopFloating()
}
}
@Override
public void onActivityStopped(Activity activity) {
runningCount–
if(runningCount == 0) {
// 백그라운드 stopFloating()
}
}

47. class BugsApplication: Application() {
override fun onCreate() {
super.onCreate()
ProcessLifecycleOwner.get().lifecycle.addObserver(BugsLifeCycleObserver(appContext))
}
}

48. class BugsLifeCycleObserver(private val appContext: Context): LifecycleObserver {
@OnLifecycleEvent(Lifecycle.Event.ON_STOP)
fun startFloatingService() {
// 백그라운드
// startFloating()
}
@OnLifecycleEvent(Lifecycle.Event.ON_START)
fun destroyFloatingService() {
// 포그라운드
// stopFloating()
}
}

53. ServiceStub extends IMusicService.Stub
play()
pause()
stop()
MediaSession.Callback()
onPlay()
onPause()
onStop()
ServiceStub extends IMusicService.Stub
getShuffleList()
getTrack()
setRepeatMode()
MediaSession.Callback()
onCustomAction()

54. BroadcastReceiver
META_CHANGED
QUEUE_CHANGED
PLAYSTATE_CHANGED
MediaBrowser
MediaController.registerCallback
onMetaChange()
onQueueChange ()
onPlayStateChange()
MediaController.Callback()
onMetadataChanged()
onQueueChanged()
onPlaybackStateChanged()