If you are using Glide v4.0.0-RC1 then you need to use RequestOptions
to add the placeholder, error image and other option. Here is an working example
RequestOptions options = new RequestOptions()
.centerCrop()
.placeholder(R.mipmap.ic_launcher_round)
.error(R.mipmap.ic_launcher_round);
Glide.with(this).load(image_url).apply(options).into(imageView);