Preload multiple images with Glide

Question

We are trying to preload images into cache memory to load them later (the images are located in the Asset folder of the application)

What we tried:

Glide.with(this)
    .load(pictureUri)
    .diskCacheStrategy(DiskCacheStrategy.ALL);

Glide.with(this)
    .load(picture_uri)
    .diskCacheStrategy(DiskCacheStrategy.ALL)
    .preload();

The issue: Images are cached only when we are trying to load/display them: They have to be loaded in memory before so that they appear faster.

Glide.with(this)
    .load(picture_uri)
    .into(imageView);

We also tried to use a GlideModule to increase the CacheMemory size:

public class GlideModule implements com.bumptech.glide.module.GlideModule {
    @Override
    public void applyOptions(Context context, GlideBuilder
        builder.setMemoryCache(new LruResourceCache(100000));
    }

    @Override
    public void registerComponents(Context context, Glide glide) {
    }
}

In the manifest:

 <meta-data android:name=".GlideModule" android:value="GlideModule"/>

Nothing is working so far. Any idea?

---

We trying to use an invisible 1 dp imageView, but the result is the same:

for(Drawing drawing: getDrawingsForTab(tab)){

    Glide.with(this)
            .load(drawing.getImage().toUri())
            .dontAnimate()
            .diskCacheStrategy(DiskCacheStrategy.ALL)
            .into(mPreloadCacheIv);

    for(Picture picture : getPictures()){

        Glide.with(this)
                .load(picture.getPicture().toUri())
                .dontAnimate()
                .diskCacheStrategy(DiskCacheStrategy.ALL)
                .into(mPreloadCacheIv);
    }
}

Answer 1

Use the following code to cache images without displaying them

1. using the downloadOnly method if you are looking to download images from the web and store them in the diskCache:

   FutureTarget<File> future = Glide.with(applicationContext)
       .load(yourUrl)
       .downloadOnly(500, 500);
   

2. using preload method if you want to load them into the Memory Cache.

   Glide.with(context)
           .load(url)
           .preload(500, 500);
   

You can later use the cached images using

Glide.with(yourFragment)
    .load(yourUrl)
    .into(yourView);

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