Minor changes

app/src/main/java/eu/kanade/mangafeed/data/cache/CoverCache.java

@@ -107,6 +107,16 @@ public class CoverCache {
         }
     }
 
+    // If the image is already in our cache, use it. If not, load it with glide
+    public void loadFromCacheOrNetwork(ImageView imageView, String thumbnailUrl, LazyHeaders headers) {
+        File localCover = get(thumbnailUrl);
+        if (localCover.exists()) {
+            loadFromCache(imageView, localCover);
+        } else {
+            loadFromNetwork(imageView, thumbnailUrl, headers);
+        }
+    }
+
     // Helper method to load the cover from the cache directory into the specified image view
     // The file must exist
     private void loadFromCache(ImageView imageView, File file) {

app/src/main/java/eu/kanade/mangafeed/ui/catalogue/CatalogueAdapter.java

@@ -7,10 +7,6 @@ import android.widget.ArrayAdapter;
 import android.widget.ImageView;
 import android.widget.TextView;
 
-import com.bumptech.glide.Glide;
-import com.bumptech.glide.load.engine.DiskCacheStrategy;
-import com.bumptech.glide.load.model.GlideUrl;
-
 import java.util.ArrayList;
 
 import butterknife.Bind;
@@ -51,11 +47,11 @@ public class CatalogueAdapter extends ArrayAdapter<Manga> {
         @Bind(R.id.thumbnail) ImageView thumbnail;
         @Bind(R.id.favorite_sticker) ImageView favorite_sticker;
 
-        CatalogueFragment fragment;
+        CataloguePresenter presenter;
 
         public ViewHolder(View view, CatalogueFragment fragment) {
-            this.fragment = fragment;
             ButterKnife.bind(this, view);
+            presenter = fragment.getPresenter();
         }
 
         public void onSetValues(Manga manga) {
@@ -63,21 +59,15 @@ public class CatalogueAdapter extends ArrayAdapter<Manga> {
             author.setText(manga.author);
 
             if (manga.thumbnail_url != null) {
-                GlideUrl url = new GlideUrl(manga.thumbnail_url,
-                        fragment.getPresenter().getSource().getGlideHeaders());
-
-                Glide.with(fragment)
-                        .load(url)
-                        .diskCacheStrategy(DiskCacheStrategy.SOURCE)
-                        .centerCrop()
-                        .into(thumbnail);
+                presenter.coverCache.loadFromCacheOrNetwork(thumbnail, manga.thumbnail_url,
+                        presenter.getSource().getGlideHeaders());
             } else {
                 thumbnail.setImageResource(android.R.color.transparent);
             }
 
-            if(manga.favorite){
+            if (manga.favorite) {
                 favorite_sticker.setVisibility(View.VISIBLE);
-            }else{
+            } else {
                 favorite_sticker.setVisibility(View.INVISIBLE);
             }
         }

app/src/main/java/eu/kanade/mangafeed/ui/catalogue/CatalogueFragment.java

@@ -13,10 +13,6 @@ import android.widget.GridView;
 import android.widget.ImageView;
 import android.widget.ProgressBar;
 
-import com.bumptech.glide.Glide;
-import com.bumptech.glide.load.engine.DiskCacheStrategy;
-import com.bumptech.glide.load.model.GlideUrl;
-
 import java.util.List;
 
 import butterknife.Bind;
@@ -177,15 +173,9 @@ public class CatalogueFragment extends BaseRxFragment<CataloguePresenter> {
 
     public void updateImage(Manga manga) {
         ImageView imageView = getImageView(getMangaIndex(manga));
-        if (imageView != null) {
-            GlideUrl url = new GlideUrl(manga.thumbnail_url,
+        if (imageView != null && manga.thumbnail_url != null) {
+            getPresenter().coverCache.loadFromNetwork(imageView, manga.thumbnail_url,
                     getPresenter().getSource().getGlideHeaders());
-
-            Glide.with(this)
-                    .load(url)
-                    .diskCacheStrategy(DiskCacheStrategy.SOURCE)
-                    .centerCrop()
-                    .into(imageView);
         }
     }
 

app/src/main/java/eu/kanade/mangafeed/ui/catalogue/CataloguePresenter.java

@@ -9,6 +9,7 @@ import java.util.concurrent.TimeUnit;
 
 import javax.inject.Inject;
 
+import eu.kanade.mangafeed.data.cache.CoverCache;
 import eu.kanade.mangafeed.data.database.DatabaseHelper;
 import eu.kanade.mangafeed.data.database.models.Manga;
 import eu.kanade.mangafeed.data.source.SourceManager;
@@ -29,6 +30,7 @@ public class CataloguePresenter extends BasePresenter<CatalogueFragment> {
 
     @Inject SourceManager sourceManager;
     @Inject DatabaseHelper db;
+    @Inject CoverCache coverCache;
 
     private Source selectedSource;
 

app/src/main/java/eu/kanade/mangafeed/ui/library/LibraryHolder.java

@@ -39,8 +39,11 @@ public class LibraryHolder extends ItemViewHolder<Manga> {
     }
 
     public void loadCover(Manga manga, Source source, CoverCache coverCache) {
-        if (manga.thumbnail_url != null)
+        if (manga.thumbnail_url != null) {
             coverCache.saveAndLoadFromCache(thumbnail, manga.thumbnail_url, source.getGlideHeaders());
+        } else {
+            thumbnail.setImageResource(android.R.color.transparent);
+        }
     }
 
 }