I'm trying to generate a Palette for each CardView I have inside a
RecyclerView, and to color the card based on the Palette generated.
However, for some weird reason, only the last two CardViews of the
RecyclerView get colored.
This is my code:
RecyclerAdapter:
public class RecyclerAdapter : RecyclerView.Adapter,
Palette.IPaletteAsyncListener
{
private List<Book> mBooks;
private RecyclerView mRecyclerView;
private Context mContext;
private int mCurrentPosition = -1;
private bool isPaletteGenerated = false;
MyView myHolder;
public RecyclerAdapter(List<Book> books, RecyclerView recyclerView,
Context context)
{
mBooks = books;
mRecyclerView = recyclerView;
mContext = context;
}
public class MyView : RecyclerView.ViewHolder
{
public View mMainView { get; set; }
public TextView mTitle { get; set; }
public ImageView mCoverImage { get; set; }
public int mCoverImageResourceID { get; set; }
public CardView mCard { get; set; }
public MyView(View view) : base(view)
{
mMainView = view;
}
}
public override RecyclerView.ViewHolder OnCreateViewHolder(ViewGroup
parent, int viewType)
{
View bookItem =
LayoutInflater.From(parent.Context).Inflate(Resource.Layout.item_book, parent,
false);
TextView bookTitle =
bookItem.FindViewById<TextView>(Resource.Id.bookTitle);
ImageView coverImage =
bookItem.FindViewById<ImageView>(Resource.Id.coverImage);
CardView card = bookItem.FindViewById<CardView>(Resource.Id.card);
MyView view = new MyView(bookItem) { mTitle = bookTitle,
mCoverImage = coverImage, mCard = card};
return view;
}
public override async void OnBindViewHolder(RecyclerView.ViewHolder
holder, int position)
{
myHolder = holder as MyView;
myHolder.mMainView.Click += mMainView_Click;
myHolder.mTitle.Text = mBooks[position].Title;
myHolder.mCoverImage.SetImageDrawable(mBooks[position].Cover.Drawable);
myHolder.mCoverImageResourceID = mBooks[position].imageResourceId;
if (position > mCurrentPosition)
{
int currentAnim = Resource.Animation.slide_left_to_right;
//SetAnimation(myHolder.mMainView, currentAnim);
mCurrentPosition = position;
}
Bitmap photo = await
BitmapFactory.DecodeResourceAsync(mContext.Resources,
myHolder.mCoverImageResourceID);
BitmapDrawable bitmapDrawable =
((BitmapDrawable)mBooks[position].Cover.Drawable);
Bitmap image = bitmapDrawable.Bitmap;
var palette =
Palette.From(photo).MaximumColorCount(16).Generate(this);
}
public void OnGenerated(Palette palette)
{
if (palette == null)
return;
try
{
if (palette.LightVibrantSwatch != null)
{
var lightVibrant = new
Color(palette.LightVibrantSwatch.Rgb);
myHolder.mCard.SetCardBackgroundColor(lightVibrant);
}
if (palette.DarkVibrantSwatch != null)
{
var darkVibrant = new Color(palette.DarkVibrantSwatch.Rgb);
myHolder.mCard.SetCardBackgroundColor(darkVibrant);
}
}
catch (Exception ex)
{
}
}
public override int ItemCount
{
get { return mBooks.Count; }
}
}
Fragment in which the RecyclerView is inside:
public override View OnCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState)
{
mRecyclerView =
view.FindViewById<RecyclerView>(Resource.Id.booksRecyclerView);
mBooks = new List<Book>();
ImageView cover = new ImageView(Activity);
cover.SetImageResource(Resource.Drawable.Torat_Hamachane1);
mBooks.Add(new Book() { Title = "תורת המחנה א' - הלכות יום ויום", Cover
= cover, imageResourceId = Resource.Drawable.Torat_Hamachane1});
mLayoutManager = new GridLayoutManager(Activity, 2);
mRecyclerView.SetForegroundGravity(GravityFlags.CenterHorizontal);
mRecyclerView.SetLayoutManager(mLayoutManager);
SimpleItemAnimator x = null;
mRecyclerView.SetItemAnimator(x);
mAdapter = new RecyclerAdapter(mBooks, mRecyclerView, Activity);
mRecyclerView.SetAdapter(mAdapter);
cover = new ImageView(Activity);
cover.SetImageResource(Resource.Drawable.kitzurTHM);
mBooks.Add(new Book() { Title = "קיצור תורת המחנה - הלכות יום ויום
ושבת", Cover = cover, imageResourceId = Resource.Drawable.kitzurTHM });
cover = new ImageView(Activity);
cover.SetImageResource(Resource.Drawable.halkasPurim);
mBooks.Add(new Book() { Title = "הלכה כסדרה - הלכות פורים", Cover =
cover, imageResourceId = Resource.Drawable.halkasPurim });
cover = new ImageView(Activity);
cover.SetImageResource(Resource.Drawable.halkasPesach);
mBooks.Add(new Book() { Title = "הלכה כסדרה - הלכות פסח", Cover =
cover, imageResourceId= Resource.Drawable.halkasPesach });
cover = new ImageView(Activity);
cover.SetImageResource(Resource.Drawable.netzach);
mBooks.Add(new Book() { Title = "שו\"ת נצח יהודה", Cover = cover ,
imageResourceId = Resource.Drawable.netzach});
cover = new ImageView(Activity);
cover.SetImageResource(Resource.Drawable.tankim);
mBooks.Add(new Book() { Title = "טיפול בטנקים בשבת", Cover = cover ,
imageResourceId = Resource.Drawable.tankim});
cover = new ImageView(Activity);
cover.SetImageResource(Resource.Drawable.tipulBeChalalim);
mBooks.Add(new Book() { Title = "טיפול בחללים בשבת", Cover = cover ,
imageResourceId = Resource.Drawable.tipulBeChalalim});
return view;
}
Hope someone can please help me find out why only the last two items get
colored.
Thanks!
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