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This is the view part of the MVI design
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package com.zk.samplenewsapp.views.detail | |
import android.content.Intent | |
import android.net.Uri | |
import android.os.Bundle | |
import android.view.LayoutInflater | |
import android.view.View | |
import android.view.ViewGroup | |
import androidx.fragment.app.Fragment | |
import androidx.lifecycle.Observer | |
import com.google.android.material.snackbar.Snackbar | |
import com.squareup.picasso.Picasso | |
import com.zk.samplenewsapp.viewModel.ArticleViewModel | |
import com.zk.samplenewsapp.databinding.ArticleFragmentBinding | |
import com.zk.samplenewsapp.model.Event | |
import com.zk.samplenewsapp.model.ViewEffect | |
import com.zk.samplenewsapp.model.DetailViewState | |
import org.koin.androidx.viewmodel.ext.android.sharedViewModel | |
class ArticleFragment : Fragment() { | |
companion object { | |
fun newInstance() = ArticleFragment() | |
} | |
private val viewModel by sharedViewModel<ArticleViewModel>() | |
private lateinit var binding: ArticleFragmentBinding | |
override fun onCreateView( | |
inflater: LayoutInflater, container: ViewGroup?, | |
savedInstanceState: Bundle? | |
): View? { | |
binding = ArticleFragmentBinding.inflate(inflater, container, false) | |
setClickEvents() | |
return binding.root | |
} | |
private fun setClickEvents() { | |
binding.link.setOnClickListener { | |
viewModel.event(Event.LinkClicked) | |
} | |
binding.fab.setOnClickListener { | |
viewModel.event(Event.AddToFavouritesClicked) | |
} | |
} | |
override fun onViewCreated(view: View, savedInstanceState: Bundle?) { | |
super.onViewCreated(view, savedInstanceState) | |
observeViewState() | |
observeViewEffects() | |
} | |
private fun observeViewEffects() { | |
viewModel.obtainAction.observe(viewLifecycleOwner, Observer { | |
trigger(it) | |
}) | |
} | |
private fun observeViewState() { | |
viewModel.obtainStateDetail.observe(viewLifecycleOwner, Observer { | |
renderState(it) | |
}) | |
} | |
private fun renderState(stateDetail: DetailViewState) { | |
with(binding) { | |
title.text = stateDetail.title | |
content.text = stateDetail.description | |
Picasso.get().load(stateDetail.backDrop).into(backdrop) | |
} | |
} | |
private fun trigger(effect: ViewEffect) { | |
when(effect) { | |
is ViewEffect.NavigateToLink -> { | |
val browserIntent = | |
Intent(Intent.ACTION_VIEW, Uri.parse(effect.url)) | |
startActivity(browserIntent) | |
} | |
is ViewEffect.ShowSnackBar -> { | |
Snackbar.make(binding.coordinator, getString(effect.messageResource), Snackbar.LENGTH_LONG) | |
.show() | |
} | |
} | |
} | |
} |
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