Update MovieListFragment using binding

Author: skydoves

app/src/main/java/com/skydoves/themovies2/binding/RecyclerViewBinding.kt

@@ -18,6 +18,8 @@ package com.skydoves.themovies2.binding
 
 import androidx.databinding.BindingAdapter
 import androidx.recyclerview.widget.RecyclerView
+import com.skydoves.baserecyclerviewadapter.BaseAdapter
+import com.skydoves.baserecyclerviewadapter.RecyclerViewPaginator
 import com.skydoves.themovies2.extension.visible
 import com.skydoves.themovies2.models.Review
 import com.skydoves.themovies2.models.Video
@@ -29,9 +31,15 @@ import com.skydoves.themovies2.view.adapter.PeopleAdapter
 import com.skydoves.themovies2.view.adapter.ReviewListAdapter
 import com.skydoves.themovies2.view.adapter.TvListAdapter
 import com.skydoves.themovies2.view.adapter.VideoListAdapter
+import com.skydoves.themovies2.view.ui.main.MainActivityViewModel
 import com.skydoves.whatif.whatIfNotNull
 import com.skydoves.whatif.whatIfNotNullOrEmpty
 
+@BindingAdapter("adapter")
+fun bindAdapter(view: RecyclerView, baseAdapter: BaseAdapter) {
+  view.adapter = baseAdapter
+}
+
 @BindingAdapter("adapterMovieList")
 fun bindAdapterMovieList(view: RecyclerView, movies: List<Movie>?) {
   movies.whatIfNotNull {
@@ -40,6 +48,19 @@ fun bindAdapterMovieList(view: RecyclerView, movies: List<Movie>?) {
   }
 }
 
+@BindingAdapter("paginationMovieList")
+fun paginationMovieList(view: RecyclerView, viewModel: MainActivityViewModel) {
+  RecyclerViewPaginator(
+    recyclerView = view,
+    isLoading = { false },
+    loadMore = { viewModel.postMoviePage(it) },
+    onLast = { false }
+  ).run {
+    threshold = 4
+    currentPage = 1
+  }
+}
+
 @BindingAdapter("adapterPersonList")
 fun bindAdapterPersonList(view: RecyclerView, people: List<Person>?) {
   people.whatIfNotNull {

app/src/main/java/com/skydoves/themovies2/binding/ViewBinding.kt

@@ -20,7 +20,9 @@ import android.annotation.SuppressLint
 import android.view.View
 import android.widget.ImageView
 import android.widget.TextView
+import android.widget.Toast
 import androidx.databinding.BindingAdapter
+import androidx.lifecycle.LiveData
 import co.lujun.androidtagview.TagContainerLayout
 import com.bumptech.glide.Glide
 import com.bumptech.glide.request.RequestOptions
@@ -35,6 +37,13 @@ import com.skydoves.themovies2.models.network.PersonDetail
 import com.skydoves.themovies2.room.converters.KeywordListMapper
 import com.skydoves.whatif.whatIfNotNull
 
+@BindingAdapter("toast")
+fun bindToast(view: View, text: LiveData<String>) {
+  text.value.whatIfNotNull {
+    Toast.makeText(view.context, it, Toast.LENGTH_SHORT).show()
+  }
+}
+
 @BindingAdapter("visibilityByResource")
 fun bindVisibilityByResource(view: View, anyList: List<Any>?) {
   anyList.whatIfNotNull {

app/src/main/java/com/skydoves/themovies2/view/adapter/MovieListAdapter.kt

@@ -23,8 +23,7 @@ import com.skydoves.themovies2.R
 import com.skydoves.themovies2.models.entity.Movie
 import com.skydoves.themovies2.view.viewholder.MovieListViewHolder
 
-class MovieListAdapter(private val delegate: MovieListViewHolder.Delegate) :
-  BaseAdapter() {
+class MovieListAdapter : BaseAdapter() {
 
   init {
     addSection(ArrayList<Movie>())
@@ -38,5 +37,5 @@ class MovieListAdapter(private val delegate: MovieListViewHolder.Delegate) :
 
   override fun layout(sectionRow: SectionRow) = R.layout.item_poster
 
-  override fun viewHolder(layout: Int, view: View) = MovieListViewHolder(view, delegate)
+  override fun viewHolder(layout: Int, view: View) = MovieListViewHolder(view)
 }

app/src/main/java/com/skydoves/themovies2/view/ui/main/MainActivityViewModel.kt

@@ -27,8 +27,7 @@ import com.skydoves.themovies2.repository.DiscoverRepository
 import com.skydoves.themovies2.repository.PeopleRepository
 import timber.log.Timber
 
-class MainActivityViewModel
-constructor(
+class MainActivityViewModel constructor(
   private val discoverRepository: DiscoverRepository,
   private val peopleRepository: PeopleRepository
 ) : DispatchViewModel() {

app/src/main/java/com/skydoves/themovies2/view/ui/main/MovieListFragment.kt

@@ -16,67 +16,23 @@
 
 package com.skydoves.themovies2.view.ui.main
 
-import android.content.Context
 import android.os.Bundle
 import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
-import androidx.lifecycle.observe
-import androidx.recyclerview.widget.GridLayoutManager
-import com.skydoves.baserecyclerviewadapter.RecyclerViewPaginator
 import com.skydoves.themovies2.R
 import com.skydoves.themovies2.compose.ViewModelFragment
 import com.skydoves.themovies2.databinding.MainFragmentMovieBinding
-import com.skydoves.themovies2.models.entity.Movie
 import com.skydoves.themovies2.view.adapter.MovieListAdapter
-import com.skydoves.themovies2.view.ui.details.movie.MovieDetailActivity
-import com.skydoves.themovies2.view.viewholder.MovieListViewHolder
-import kotlinx.android.synthetic.main.main_fragment_movie.*
-import org.jetbrains.anko.support.v4.toast
-import org.koin.android.viewmodel.ext.android.viewModel
+import org.koin.android.viewmodel.ext.android.getViewModel
 
-class MovieListFragment : ViewModelFragment(), MovieListViewHolder.Delegate {
-
-  private val viewModel by viewModel<MainActivityViewModel>()
-  private lateinit var binding: MainFragmentMovieBinding
+class MovieListFragment : ViewModelFragment() {
 
   override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? {
-    binding = binding(inflater, R.layout.main_fragment_movie, container)
-    binding.viewModel = viewModel
-    binding.lifecycleOwner = this
-    return binding.root
-  }
-
-  override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
-    super.onViewCreated(view, savedInstanceState)
-    initializeUI()
-  }
-
-  override fun onAttach(context: Context) {
-    super.onAttach(context)
-    loadMore(page = 1)
-    observeMessages()
+    return binding<MainFragmentMovieBinding>(inflater, R.layout.main_fragment_movie, container).apply {
+      viewModel = getViewModel<MainActivityViewModel>().apply { postMoviePage(1) }
+      lifecycleOwner = this@MovieListFragment
+      adapter = MovieListAdapter()
+    }.root
   }
-
-  private fun initializeUI() {
-    recyclerView.adapter = MovieListAdapter(this)
-    recyclerView.layoutManager = GridLayoutManager(context, 2)
-    RecyclerViewPaginator(
-      recyclerView = recyclerView,
-      isLoading = { false },
-      loadMore = { loadMore(it) },
-      onLast = { false }
-    ).apply {
-      threshold = 4
-      currentPage = 1
-    }
-  }
-
-  private fun loadMore(page: Int) = viewModel.postMoviePage(page)
-
-  override fun onItemClick(movie: Movie) =
-    MovieDetailActivity.startActivityModel(context, movie)
-
-  private fun observeMessages() =
-    this.viewModel.toastLiveData.observe(this) { toast(it) }
 }

app/src/main/java/com/skydoves/themovies2/view/viewholder/MovieListViewHolder.kt

@@ -23,17 +23,13 @@ import com.github.florent37.glidepalette.GlidePalette
 import com.skydoves.baserecyclerviewadapter.BaseViewHolder
 import com.skydoves.themovies2.api.Api
 import com.skydoves.themovies2.models.entity.Movie
+import com.skydoves.themovies2.view.ui.details.movie.MovieDetailActivity
 import kotlinx.android.synthetic.main.item_poster.view.*
 
-class MovieListViewHolder(
-  val view: View,
-  private val delegate: Delegate
+class MovieListViewHolder constructor(
+  val view: View
 ) : BaseViewHolder(view) {
 
-  interface Delegate {
-    fun onItemClick(movie: Movie)
-  }
-
   private lateinit var movie: Movie
 
   @Throws(Exception::class)
@@ -59,7 +55,7 @@ class MovieListViewHolder(
     }
   }
 
-  override fun onClick(v: View?) = delegate.onItemClick(movie)
+  override fun onClick(v: View?) = MovieDetailActivity.startActivityModel(context(), movie)
 
   override fun onLongClick(v: View?) = false
 }

app/src/main/res/layout/main_fragment_movie.xml

@@ -8,6 +8,10 @@
     <variable
       name="viewModel"
       type="com.skydoves.themovies2.view.ui.main.MainActivityViewModel" />
+
+    <variable
+      name="adapter"
+      type="com.skydoves.themovies2.view.adapter.MovieListAdapter" />
   </data>
 
   <RelativeLayout
@@ -19,7 +23,12 @@
       android:layout_width="match_parent"
       android:layout_height="match_parent"
       android:clipToPadding="false"
+      app:adapter="@{adapter}"
       app:adapterMovieList="@{viewModel.movieListLiveData}"
+      app:layoutManager="androidx.recyclerview.widget.GridLayoutManager"
+      app:paginationMovieList="@{viewModel}"
+      app:spanCount="2"
+      app:toast="@{viewModel.toastLiveData}"
       tools:listitem="@layout/item_poster" />
   </RelativeLayout>
 </layout>