Glide gif doesnt play

try this.

Glide.with(context)
    .load(imageUrl)
    .asGif()
    .placeholder(R.drawable.loading2)
    .crossFade()
    .into(imageView);

In my case I had set the imageview dimensions to match_parent and specifying it in dp did it for me.

Not sure why exactly match_parent doesn't work in a dialog, playing GIFs, probably something to do with the scaling, if this is the case then using scaleType:fitXY should work too

You can also try

Glide  
    .with(context)
    .load(gifUrl)
    .asGif()
    .error(R.drawable.full_cake)
    .diskCacheStrategy(DiskCacheStrategy.SOURCE)`
    .into(imageViewGif);

Change your gif your to https://i.giphy.com/media/7rj2ZgttvgomY/giphy.webp

Glide.with(context)
.load("https://i.giphy.com/media/7rj2ZgttvgomY/giphy.webp")
.asGif().into(imageView);

Also you can try GIFView

You can refer to : https://github.com/bumptech/glide/issues/1059

If you don't find it, you can change the lastest version of Gline

repositories {
  mavenCentral()
  maven { url 'https://maven.google.com' }
}

dependencies {
  compile 'com.github.bumptech.glide:glide:4.2.0'
  annotationProcessor 'com.github.bumptech.glide:compiler:4.2.0'
}

I hope you can find solution.

There is nothing wrong with your code. You could check if you have Internet permission.

<uses-permission android:name="android.permission.INTERNET" />

Your internet speed might be slow and Glide might be taking too much time to load so by that time you could add a placeholder image using :

.placeholder(android.R.color.holo_green_dark)

Or you could add Listner to the Request using

  .listener(new RequestListener<String, GlideDrawable>() {
                    @Override
                    public boolean onException(Exception e, String model, Target<GlideDrawable> target, boolean isFirstResource) {
                        return false;
                    }

                    @Override
                    public boolean onResourceReady(GlideDrawable resource, String model, Target<GlideDrawable> target, boolean isFromMemoryCache, boolean isFirstResource) {
                        return false;
                    }
                })

And see what is the Exception.