AppGlideModule.java

@GlideModule
public class YourAppGlideModule extends AppGlideModule {
  @Override
  public void applyOptions(Context context, GlideBuilder builder) {
    MemorySizeCalculator calculator = new MemorySizeCalculator.Builder(context)
        .setMemoryCacheScreens(2)
        .build();
    builder.setMemoryCache(new LruResourceCache(calculator.getMemoryCacheSize()));
  }
}