Syex

class Emitter(private val stateObservable: Observable<State>) {

  private val subject = BehaviorSubject.create<Data>()
  
  init {
    stateObservable.subscribe { stateChanged(it) }
  }
  
  private fun stateChanged(state: State) {
    when (state) {

Syex

class Emitter {
  
  fun defaultStateObservable(): Observable<Data>
  
  fun specialStateObservable(): Observable<Data>
}

Syex

class Emitter {
  
  fun defaultStateObservable(): Observable<Data>
  
  fun specialStateObservable(): Observable<Data>
}

Syex

class Emitter(private val stateObservable: Observable<State>) {
  
  init {
    stateObservable.subscribe { stateChanged(it) }
  }
  
  private fun stateChanged(state: State) {
    
  }
  

Syex

class Emitter(private val stateObservable: Observable<State>) {

  private val subject = BehaviorSubject.create<Data>()
  private var subscriberCount = AtomicInteger()
  private val onSubscribeConsumer: (() -> Unit) = {
      if (subscriberCount.getAndIncrement() == 0) subscribeToObservable() 
  }
  private val onDisposeConsumer: (() -> Unit) = { 
      if (subscriberCount.decrementAndGet() == 0) unsubscribeFromObservable()
  }

Syex

interface SampleRepository {
  
  fun getData(): Observable<Data>
}

Syex

class SampleRepositoryImpl(private val emitter: Emitter) : SampleRepository {
 
  override fun getData(): Observable<Data> = emitter.stateObservable()
}

Syex

fun recognizeText() {
  val bitmap = BitmapFactory.decodeResource(resources, R.drawable.image)
  val visionImage = FirebaseVisionImage.fromBitmap(bitmap)
  val detector = FirebaseVision.getInstance().visionTextDetector

  detector.detectInImage(visionImage)
          .addOnSuccessListener {
              for (block in it.blocks) {
                 val boundingBox = block.boundingBox
                 val cornerPoints = block.cornerPoints

Syex

<provider
  android:name="android.support.v4.content.FileProvider"
  android:authorities="${applicationId}.provider"
  android:exported="false"
  android:grantUriPermissions="true">
  <meta-data
    android:name="android.support.FILE_PROVIDER_PATHS"
    android:resource="@xml/provider_paths"/>
</provider>

Syex

<?xml version="1.0" encoding="utf-8"?>
<paths>
    <files-path
        name="images"
        path="." />
</paths>