[ADDED] Enhancement on the movie details page by adding related contents.

app/src/main/java/com/hossainkhan/android/demo/ui/functionaldemo/MovieDetailsPreviewActivity.kt

@@ -30,6 +30,8 @@ import android.widget.ImageView
 import androidx.annotation.ColorRes
 import androidx.core.content.ContextCompat
 import androidx.core.widget.ImageViewCompat
+import androidx.recyclerview.widget.LinearLayoutManager
+import androidx.recyclerview.widget.RecyclerView
 
 /**
  * Activity showcasing how visibility GONE affects constraints.
@@ -49,6 +51,8 @@ class MovieDetailsPreviewActivity : LayoutPreviewBaseActivity() {
     }
 
 
+    private lateinit var recyclerView: RecyclerView
+
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
 
@@ -66,6 +70,14 @@ class MovieDetailsPreviewActivity : LayoutPreviewBaseActivity() {
             val youtubeTrailerUrl = "https://www.youtube.com/watch?v=g4Hbz2jLxvQ"
             startActivity(Intent(Intent.ACTION_VIEW, Uri.parse(youtubeTrailerUrl)))
         }
+
+        recyclerView = findViewById(R.id.movie_related_contents)
+
+        recyclerView.apply {
+            setHasFixedSize(true)
+            layoutManager = LinearLayoutManager(this@MovieDetailsPreviewActivity, LinearLayoutManager.HORIZONTAL, false)
+            adapter = MoviePosterAdapter()
+        }
     }
 
     private fun applyToastListener(vararg views: View) {

app/src/main/java/com/hossainkhan/android/demo/ui/functionaldemo/MoviePosterAdapter.kt

@@ -0,0 +1,56 @@
+/*
+ * Copyright (c) 2019 Hossain Khan
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.hossainkhan.android.demo.ui.functionaldemo
+
+import android.view.LayoutInflater
+import android.view.ViewGroup
+import android.widget.ImageView
+import androidx.recyclerview.widget.RecyclerView
+import com.hossainkhan.android.demo.R
+
+/**
+ * A simple adapter container movie poster images.
+ */
+class MoviePosterAdapter : RecyclerView.Adapter<MoviePosterAdapter.PosterViewHolder>() {
+    private val posterImageResourceIds = listOf(
+            R.drawable.poster_lego_batman,
+            R.drawable.poster_i2,
+            R.drawable.poster_angry_birds,
+            R.drawable.poster_lego_movie,
+            R.drawable.poster_wreckit_ralph,
+            R.drawable.poster_dragon3
+    )
+
+    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): PosterViewHolder {
+        // create a new view
+        val posterView = LayoutInflater.from(parent.context)
+                .inflate(R.layout.list_item_poster, parent, false) as ImageView
+
+        return PosterViewHolder(posterView)
+    }
+
+    override fun getItemCount(): Int {
+        return posterImageResourceIds.size
+    }
+
+    override fun onBindViewHolder(holder: PosterViewHolder, position: Int) {
+        holder.posterView.setImageResource(posterImageResourceIds[position])
+    }
+
+    // Provide a reference to the views for each data item
+    class PosterViewHolder(val posterView: ImageView) : RecyclerView.ViewHolder(posterView)
+}

app/src/main/res/drawable/ic_baseline_4k_18dp.xml

@@ -0,0 +1,27 @@
+<!--
+  ~ Copyright (c) 2019 Hossain Khan
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~     http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+  -->
+
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="18dp"
+    android:height="18dp"
+    android:alpha="0.9"
+    android:tint="#666666"
+    android:viewportWidth="24"
+    android:viewportHeight="24">
+    <path
+        android:fillColor="#FF000000"
+        android:pathData="M19,3L5,3c-1.1,0 -2,0.9 -2,2v14c0,1.1 0.9,2 2,2h14c1.1,0 2,-0.9 2,-2L21,5c0,-1.1 -0.9,-2 -2,-2zM12,13.5h-1L11,15L9.5,15v-1.5h-3L6.5,9L8,9v3h1.5L9.5,9L11,9v3h1v1.5zM18,15h-1.75l-1.75,-2.25L14.5,15L13,15L13,9h1.5v2.25L16.25,9L18,9l-2.25,3L18,15z" />
+</vector>

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

@@ -1,4 +1,6 @@
-<?xml version="1.0" encoding="utf-8"?><!--
+<?xml version="1.0" encoding="utf-8"?>
+
+<!--
   ~ Copyright (c) 2019 Hossain Khan
   ~
   ~ Licensed under the Apache License, Version 2.0 (the "License");
@@ -48,7 +50,6 @@
         <!-- ================  Begin top section with background, poster and meta info  ================ -->
 
 
-
         <ImageView
             android:id="@+id/thumbnail"
             android:layout_width="0dp"
@@ -79,21 +80,21 @@
             android:id="@+id/poster"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
-            android:src="@drawable/spider_verse_poster"
+            android:src="@drawable/poster_spider_verse_detail"
             app:layout_constraintBottom_toBottomOf="@+id/thumbnail"
             app:layout_constraintStart_toStartOf="@+id/guideline_vertical_start"
-            app:layout_constraintTop_toBottomOf="@+id/movie_trailer" />
+            app:layout_constraintTop_toTopOf="@+id/thumbnail" />
 
         <TextView
             android:id="@+id/movie_title"
             style="@style/TextAppearance.AppCompat.Title.Inverse"
             android:layout_width="0dp"
             android:layout_height="wrap_content"
-            android:layout_marginStart="8dp"
+            android:layout_marginStart="16dp"
             android:text="Spider-Man: Into The Spider-Verse"
             app:layout_constraintEnd_toEndOf="@id/guideline_vertical_end"
             app:layout_constraintStart_toEndOf="@+id/poster"
-            app:layout_constraintTop_toTopOf="@+id/poster" />
+            app:layout_constraintTop_toBottomOf="@+id/movie_trailer" />
 
         <TextView
             android:id="@+id/movie_rating_and_time"
@@ -125,7 +126,8 @@
             android:layout_gravity="center"
             android:layout_marginStart="16dp"
             android:drawableStart="@drawable/ic_people_black_18dp"
-            android:drawablePadding="3dp"
+            android:drawablePadding="5dp"
+            android:drawableEnd="@drawable/ic_baseline_4k_18dp"
             android:drawableTint="@android:color/white"
             android:text="93%"
             app:layout_constraintLeft_toRightOf="@+id/user_rating"
@@ -208,6 +210,35 @@
 
         <!--  =========================== End Chained Button ===========================  -->
 
+        <!-- ======================= BEGIN Recycler view with related movies ======================== -->
+
+        <TextView
+            android:id="@+id/movie_related_title"
+            style="@style/TextAppearance.AppCompat.Title.Inverse"
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="16dp"
+            android:text="Similar Movies"
+            app:layout_constraintLeft_toLeftOf="@+id/guideline_vertical_start"
+            app:layout_constraintRight_toRightOf="@+id/guideline_vertical_end"
+            app:layout_constraintTop_toBottomOf="@+id/button_rent" />
+
+        <androidx.recyclerview.widget.RecyclerView
+            android:id="@+id/movie_related_contents"
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="16dp"
+            app:layout_constraintLeft_toLeftOf="parent"
+            app:layout_constraintRight_toRightOf="parent"
+            app:layout_constraintTop_toBottomOf="@+id/movie_related_title"
+            tools:background="@color/md_pink_100"
+            tools:itemCount="4"
+            tools:layoutManager="LinearLayoutManager"
+            tools:listitem="@layout/list_item_poster"
+            tools:orientation="horizontal" />
+
+        <!-- ======================= END Recycler view - similar movies ======================== -->
+
 
         <!-- ======================= BEGIN More info block with lots of text info ======================== -->
 
@@ -216,11 +247,11 @@
             style="@style/TextAppearance.AppCompat.Title.Inverse"
             android:layout_width="0dp"
             android:layout_height="wrap_content"
-            android:layout_marginTop="16dp"
+            android:layout_marginTop="24dp"
             android:text="More Information"
             app:layout_constraintLeft_toLeftOf="@+id/guideline_vertical_start"
             app:layout_constraintRight_toRightOf="@+id/guideline_vertical_end"
-            app:layout_constraintTop_toBottomOf="@+id/button_rent" />
+            app:layout_constraintTop_toBottomOf="@+id/movie_related_contents" />
 
         <TextView
             android:id="@+id/info_audio_language_label"

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

@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="utf-8"?>
+
+<!--
+  ~ Copyright (c) 2019 Hossain Khan
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~     http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+  -->
+
+<ImageView xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:id="@+id/poster_view"
+    android:layout_width="wrap_content"
+    android:layout_height="wrap_content"
+    android:paddingStart="16dp"
+    android:paddingEnd="0dp"
+    android:src="@drawable/poster_angry_birds"
+    tools:background="@color/md_pink_300"
+    tools:ignore="ContentDescription" />