Skip to content

Instantly share code, notes, and snippets.

@gpeal
Created April 18, 2019 05:44
  • Star 0 You must be signed in to star a gist
  • Fork 0 You must be signed in to fork a gist
Star You must be signed in to star a gist
Save gpeal/91bec13458bbba2938e6ae597b70ef0f to your computer and use it in GitHub Desktop.
MvRx Counter
package com.airbnb.mvrx.counter
import android.os.Bundle
import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import com.airbnb.mvrx.Async
import com.airbnb.mvrx.BaseMvRxFragment
import com.airbnb.mvrx.Loading
import com.airbnb.mvrx.MvRxState
import com.airbnb.mvrx.Uninitialized
import com.airbnb.mvrx.activityViewModel
import com.airbnb.mvrx.withState
import com.google.android.material.snackbar.Snackbar
import io.reactivex.Observable
import kotlinx.android.synthetic.main.fragment_counter.counterText
import java.util.concurrent.TimeUnit
data class CounterState(val count: Int = 0, val countRequest: Async<Int> = Uninitialized) : MvRxState
class CounterViewModel(state: CounterState) : MvRxViewModel<CounterState>(state) {
fun incrementCount() = withState { state ->
Observable.just(state.count + 1)
.delay(1, TimeUnit.SECONDS)
.execute { copy(countRequest = it, count = it() ?: count) }
}
}
class CounterFragment : BaseMvRxFragment() {
private val viewModel: CounterViewModel by activityViewModel()
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
viewModel.asyncSubscribe(CounterState::countRequest, deliveryMode = uniqueOnly(), onFail = { e ->
Snackbar.make(containerView, "Failed to load count! ${e.message}", Snackbar.LENGTH_SHORT).show()
})
}
override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? {
return inflater.inflate(R.layout.fragment_counter, container, false)
}
override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
counterText.setOnClickListener {
viewModel.incrementCount()
}
}
override fun invalidate() = withState(viewModel) { state ->
counterLoading.isVisible = state.countRequest is Loading
if (state.count is Uninitialized) {
counterText.text = "Uninitialized"
} else {
counterText.text = state.count.toString()
}
}
companion object {
fun newInstance() = CounterFragment()
}
}
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment