CODEWITHSUNDEEP
androidxamarin
puko
puko

Reputation: 2980

Animated transparent GIF Image

I have animated transparent gif image and need to display it in android. I tried Component GifImageView, everything is ok but background is black not transparent.

Thanks

 Stream input = Assets.Open("oie_2103618iUK1c2Pr.gif");
 byte[] bytes;
 using (MemoryStream ms = new MemoryStream())
 {
       input.CopyTo(ms);
       bytes = ms.ToArray();
 }

_gifImageView = new GifImageView(this);
_gifImageView.SetBytes(bytes);
_gifImageView.Background = new ColorDrawable(Color.Transparent);

LinearLayout giflayout = FindViewById<LinearLayout>(Resource.Id.gif);              
giflayout.AddView(_gifImageView);

Upvotes: 1

Views: 3032

Answers (3)

Pyro
Pyro

Reputation: 11

The current version of GifImageView doesn't have transparency changes that were just made a few days ago. I was able to get it working by having my Activity inherit from GifImageView.IOnFrameAvailableListener and setting my gifImageView.OnFrameAvailableListener to the Activity(as seen here). The last thing was to implement OnFrameAvailable in the Activity itself.

public Bitmap OnFrameAvailable(Bitmap bitmap)
    {
        if (bitmap != null) {
            var newBitmap = bitmap.Copy (Bitmap.Config.Argb8888, true);
            newBitmap.HasAlpha = true;

            var pixelArray = new int[bitmap.Width * bitmap.Height];
            bitmap.GetPixels (pixelArray, 0, bitmap.Width, 0, 0, bitmap.Width, bitmap.Height);
            for (int ctr = 0; ctr <pixelArray.Count(); ctr++)
            {
                pixelArray[ctr] = pixelArray[ctr] == -16777216 ? 0 : pixelArray[ctr];
            }
            newBitmap.SetPixels (pixelArray, 0, bitmap.Width, 0, 0, bitmap.Width, bitmap.Height);
            return newBitmap;
        }

        return bitmap;
    }

This worked for me, hopefully it works for you too. You may need to change -16777216 to -1 if you see white backgrounds. Hopefully GifImageView gets updated soon, as this post-processing is not ideal.

Upvotes: 0

Roman
Roman

Reputation: 43

try to add:

GifImageView.setBackgroung();

or read this: Transparent GIF in Android ImageView

You can use another library, like Android Gif Drawable (GifImageView does not support transparent gifs), or set backround color (not transpatent) in gif, with gif editor.

Upvotes: 2

Android Android
Android Android

Reputation: 724

you cant set transparent background for gif image. Just remove it with online gif editor. There are a lot of them

Upvotes: 0

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