[recyclerview] better OO, formatting (#310)

fixes https://github.com/MicrosoftDocs/xamarin-docs/issues/1372

Author: conceptdev

android5.0/RecyclerViewer/RecyclerViewer/MainActivity.cs

@@ -9,61 +9,61 @@
 using System.Collections.Generic;
 
 namespace RecyclerViewer
-{
-	[Activity (Label = "RecyclerViewer", MainLauncher = true, Icon = "@drawable/icon", 
-               Theme = "@android:style/Theme.Material.Light.DarkActionBar")]
-	public class MainActivity : Activity
-	{
-        // RecyclerView instance that displays the photo album:
-		RecyclerView mRecyclerView;
-
-        // Layout manager that lays out each card in the RecyclerView:
-		RecyclerView.LayoutManager mLayoutManager;
-
-        // Adapter that accesses the data set (a photo album):
-		PhotoAlbumAdapter mAdapter;
+{
+    [Activity(Label = "RecyclerViewer", MainLauncher = true, Icon = "@drawable/icon",
+               Theme = "@android:style/Theme.Material.Light.DarkActionBar")]
+    public class MainActivity : Activity
+    {
+        // RecyclerView instance that displays the photo album:
+        RecyclerView mRecyclerView;
+
+        // Layout manager that lays out each card in the RecyclerView:
+        RecyclerView.LayoutManager mLayoutManager;
+
+        // Adapter that accesses the data set (a photo album):
+        PhotoAlbumAdapter mAdapter;
 
         // Photo album that is managed by the adapter:
-        PhotoAlbum mPhotoAlbum;
-
-		protected override void OnCreate (Bundle bundle)
-		{
-			base.OnCreate (bundle);
+        PhotoAlbum mPhotoAlbum;
+
+        protected override void OnCreate(Bundle bundle)
+        {
+            base.OnCreate(bundle);
 
             // Instantiate the photo album:
-            mPhotoAlbum = new PhotoAlbum();
-
-			// Set our view from the "main" layout resource:
-			SetContentView (Resource.Layout.Main);
-
-            // Get our RecyclerView layout:
-			mRecyclerView = FindViewById<RecyclerView> (Resource.Id.recyclerView);
-
-            //............................................................
-            // Layout Manager Setup:
-
-            // Use the built-in linear layout manager:
-			mLayoutManager = new LinearLayoutManager (this);
+            mPhotoAlbum = new PhotoAlbum();
+
+            // Set our view from the "main" layout resource:
+            SetContentView(Resource.Layout.Main);
+
+            // Get our RecyclerView layout:
+            mRecyclerView = FindViewById<RecyclerView>(Resource.Id.recyclerView);
+
+            //............................................................
+            // Layout Manager Setup:
+
+            // Use the built-in linear layout manager:
+            mLayoutManager = new LinearLayoutManager(this);
 
             // Or use the built-in grid layout manager (two horizontal rows):
             // mLayoutManager = new GridLayoutManager
             //        (this, 2, GridLayoutManager.Horizontal, false);
 
             // Plug the layout manager into the RecyclerView:
-            mRecyclerView.SetLayoutManager (mLayoutManager);
-
-            //............................................................
-            // Adapter Setup:
-
-            // Create an adapter for the RecyclerView, and pass it the
-            // data set (the photo album) to manage:
-			mAdapter = new PhotoAlbumAdapter (mPhotoAlbum);
+            mRecyclerView.SetLayoutManager(mLayoutManager);
+
+            //............................................................
+            // Adapter Setup:
+
+            // Create an adapter for the RecyclerView, and pass it the
+            // data set (the photo album) to manage:
+            mAdapter = new PhotoAlbumAdapter(mPhotoAlbum);
 
             // Register the item click handler (below) with the adapter:
-            mAdapter.ItemClick += OnItemClick;
-
-            // Plug the adapter into the RecyclerView:
-			mRecyclerView.SetAdapter (mAdapter);
+            mAdapter.ItemClick += OnItemClick;
+
+            // Plug the adapter into the RecyclerView:
+            mRecyclerView.SetAdapter(mAdapter);
 
             //............................................................
             // Random Pick Button:
@@ -84,17 +84,17 @@ protected override void OnCreate (Bundle bundle)
                     mAdapter.NotifyItemChanged(0);
                     mAdapter.NotifyItemChanged(idx);
                 }
-            };
-		}
+            };
+        }
 
         // Handler for the item click event:
-        void OnItemClick (object sender, int position)
+        void OnItemClick(object sender, int position)
         {
             // Display a toast that briefly shows the enumeration of the selected photo:
             int photoNum = position + 1;
             Toast.MakeText(this, "This is photo number " + photoNum, ToastLength.Short).Show();
-        }
-	}
+        }
+    }
 
     //----------------------------------------------------------------------
     // VIEW HOLDER
@@ -108,16 +108,16 @@ public class PhotoViewHolder : RecyclerView.ViewHolder
         public TextView Caption { get; private set; }
 
         // Get references to the views defined in the CardView layout.
-        public PhotoViewHolder (View itemView, Action<int> listener) 
-            : base (itemView)
+        public PhotoViewHolder(View itemView, Action<int> listener)
+            : base(itemView)
         {
             // Locate and cache view references:
-            Image = itemView.FindViewById<ImageView> (Resource.Id.imageView);
-            Caption = itemView.FindViewById<TextView> (Resource.Id.textView);
+            Image = itemView.FindViewById<ImageView>(Resource.Id.imageView);
+            Caption = itemView.FindViewById<TextView>(Resource.Id.textView);
 
             // Detect user clicks on the item view and report which item
             // was clicked (by layout position) to the listener:
-            itemView.Click += (sender, e) => listener (base.LayoutPosition);
+            itemView.Click += (sender, e) => listener(base.LayoutPosition);
         }
     }
 
@@ -131,37 +131,37 @@ public class PhotoAlbumAdapter : RecyclerView.Adapter
         public event EventHandler<int> ItemClick;
 
         // Underlying data set (a photo album):
-        public PhotoAlbum mPhotoAlbum;
+        PhotoAlbum mPhotoAlbum;
 
         // Load the adapter with the data set (photo album) at construction time:
-        public PhotoAlbumAdapter (PhotoAlbum photoAlbum)
+        public PhotoAlbumAdapter(PhotoAlbum photoAlbum)
         {
             mPhotoAlbum = photoAlbum;
         }
 
         // Create a new photo CardView (invoked by the layout manager): 
-        public override RecyclerView.ViewHolder 
-            OnCreateViewHolder (ViewGroup parent, int viewType)
+        public override RecyclerView.ViewHolder
+            OnCreateViewHolder(ViewGroup parent, int viewType)
         {
             // Inflate the CardView for the photo:
-            View itemView = LayoutInflater.From (parent.Context).
-                        Inflate (Resource.Layout.PhotoCardView, parent, false);
+            View itemView = LayoutInflater.From(parent.Context).
+                        Inflate(Resource.Layout.PhotoCardView, parent, false);
 
             // Create a ViewHolder to find and hold these view references, and 
             // register OnClick with the view holder:
-            PhotoViewHolder vh = new PhotoViewHolder (itemView, OnClick); 
+            PhotoViewHolder vh = new PhotoViewHolder(itemView, OnClick);
             return vh;
         }
 
         // Fill in the contents of the photo card (invoked by the layout manager):
-        public override void 
-            OnBindViewHolder (RecyclerView.ViewHolder holder, int position)
+        public override void
+            OnBindViewHolder(RecyclerView.ViewHolder holder, int position)
         {
             PhotoViewHolder vh = holder as PhotoViewHolder;
 
             // Set the ImageView and TextView in this ViewHolder's CardView 
             // from this position in the photo album:
-            vh.Image.SetImageResource (mPhotoAlbum[position].PhotoID);
+            vh.Image.SetImageResource(mPhotoAlbum[position].PhotoID);
             vh.Caption.Text = mPhotoAlbum[position].Caption;
         }
 
@@ -172,10 +172,10 @@ public override int ItemCount
         }
 
         // Raise an event when the item-click takes place:
-        void OnClick (int position)
+        void OnClick(int position)
         {
             if (ItemClick != null)
-                ItemClick (this, position);
+                ItemClick(this, position);
         }
     }
 }