Encapsulated CoverTarget

1 files changed, 123 insertions, 0 deletions

diff --git a/app/src/main/java/de/danoeh/antennapod/adapter/CoverLoader.java b/app/src/main/java/de/danoeh/antennapod/adapter/CoverLoader.java
new file mode 100644
index 000000000..7d8ff2897
--- /dev/null
+++ b/app/src/main/java/de/danoeh/antennapod/adapter/CoverLoader.java
@@ -0,0 +1,123 @@
+package de.danoeh.antennapod.adapter;
+
+import android.graphics.drawable.Drawable;
+import android.os.Handler;
+import android.support.annotation.NonNull;
+import android.support.annotation.Nullable;
+import android.view.View;
+import android.widget.ImageView;
+import android.widget.TextView;
+
+import com.bumptech.glide.Glide;
+import com.bumptech.glide.RequestBuilder;
+import com.bumptech.glide.request.RequestOptions;
+import com.bumptech.glide.request.target.CustomViewTarget;
+
+import java.lang.ref.WeakReference;
+
+import com.bumptech.glide.request.transition.Transition;
+import de.danoeh.antennapod.activity.MainActivity;
+import de.danoeh.antennapod.core.glide.ApGlideSettings;
+
+public class CoverLoader {
+    private String uri;
+    private String fallbackUri;
+    private TextView txtvPlaceholder;
+    private ImageView imgvCover;
+    private MainActivity activity;
+    private int errorResource = -1;
+
+    public CoverLoader(MainActivity activity) {
+        this.activity = activity;
+    }
+
+    public CoverLoader withUri(String uri) {
+        this.uri = uri;
+        return this;
+    }
+
+    public CoverLoader withFallbackUri(String uri) {
+        fallbackUri = uri;
+        return this;
+    }
+
+    public CoverLoader withCoverView(ImageView coverView) {
+        imgvCover = coverView;
+        return this;
+    }
+
+    public CoverLoader withError(int errorResource) {
+        this.errorResource = errorResource;
+        return this;
+    }
+
+    public CoverLoader withPlaceholderView(TextView placeholderView) {
+        txtvPlaceholder = placeholderView;
+        return this;
+    }
+
+    public void load() {
+        RequestOptions options = new RequestOptions()
+                .diskCacheStrategy(ApGlideSettings.AP_DISK_CACHE_STRATEGY)
+                .fitCenter()
+                .dontAnimate();
+
+        if (errorResource != -1) {
+            options = options.error(errorResource);
+        }
+
+        Glide.with(activity)
+                .load(uri)
+                .apply(options)
+                .into(new CoverTarget(fallbackUri, txtvPlaceholder, imgvCover, activity));
+    }
+
+    class CoverTarget extends CustomViewTarget<ImageView, Drawable> {
+
+        private final WeakReference<String> fallback;
+        private final WeakReference<TextView> placeholder;
+        private final WeakReference<ImageView> cover;
+        private final WeakReference<MainActivity> mainActivity;
+
+        public CoverTarget(String fallbackUri, TextView txtvPlaceholder, ImageView imgvCover, MainActivity activity) {
+            super(imgvCover);
+            fallback = new WeakReference<>(fallbackUri);
+            placeholder = new WeakReference<>(txtvPlaceholder);
+            cover = new WeakReference<>(imgvCover);
+            mainActivity = new WeakReference<>(activity);
+        }
+
+        @Override
+        public void onLoadFailed(Drawable errorDrawable) {
+            String fallbackUri = fallback.get();
+            TextView txtvPlaceholder = placeholder.get();
+            ImageView imgvCover = cover.get();
+            if (fallbackUri != null && txtvPlaceholder != null && imgvCover != null) {
+                MainActivity activity = mainActivity.get();
+                new Handler().post(() -> Glide.with(activity)
+                        .load(fallbackUri)
+                        .apply(new RequestOptions()
+                                .diskCacheStrategy(ApGlideSettings.AP_DISK_CACHE_STRATEGY)
+                                .fitCenter()
+                                .dontAnimate())
+                        .into(new CoverTarget(null, txtvPlaceholder, imgvCover, activity)));
+            }
+        }
+
+        @Override
+        public void onResourceReady(@NonNull Drawable resource, @Nullable Transition<? super Drawable> transition) {
+            TextView txtvPlaceholder = placeholder.get();
+            if (txtvPlaceholder != null) {
+                txtvPlaceholder.setVisibility(View.INVISIBLE);
+            }
+            ImageView ivCover = cover.get();
+            ivCover.setImageDrawable(resource);
+        }
+
+        @Override
+        protected void onResourceCleared(@Nullable Drawable placeholder) {
+            ImageView ivCover = cover.get();
+            ivCover.setImageDrawable(placeholder);
+        }
+    }
+}
\ No newline at end of file