Load placeholder image into big images

app/src/main/java/app/insti/Helpers.java

+package app.insti;
+
+import android.widget.ImageView;
+
+import com.squareup.picasso.Callback;
+import com.squareup.picasso.Picasso;
+
+import java.time.Instant;
+
+public final class Helpers {
+    public static final void loadImageWithPlaceholder(final ImageView imageView, final String url) {
+        Picasso.get()
+            .load(Constants.resizeImageUrl(url, 200))
+            .into(imageView, new Callback() {
+                @Override
+                public void onSuccess() {
+                    Picasso.get()
+                            .load(url)
+                            .placeholder(imageView.getDrawable())
+                            .into(imageView);
+                }
+                @Override
+                public void onError(Exception ex) {}
+            });
+    }
+}

app/src/main/java/app/insti/adapter/FeedAdapter.java

@@ -24,6 +24,7 @@ import java.util.Calendar;
 
 
 import app.insti.Constants;
+import app.insti.Helpers;
 import app.insti.activity.MainActivity;
 import app.insti.fragment.EventFragment;
 import app.insti.interfaces.ItemClickListener;
@@ -133,7 +134,7 @@ public class FeedAdapter extends RecyclerView.Adapter<FeedAdapter.ViewHolder> {
         if (currentEvent.isEventBigImage()) {
             viewHolder.eventBigPicture.setVisibility(View.VISIBLE);
             viewHolder.eventPicture.setVisibility(View.GONE);
-            Picasso.get().load(currentEvent.getEventImageURL()).into(viewHolder.eventBigPicture);
+            Helpers.loadImageWithPlaceholder(viewHolder.eventBigPicture, currentEvent.getEventImageURL());
         } else {
             Picasso.get().load(
                     Constants.resizeImageUrl(currentEvent.getEventImageURL(), 200)

app/src/main/java/app/insti/fragment/BodyFragment.java

@@ -35,6 +35,7 @@ import java.util.ArrayList;
 import java.util.List;
 
 import app.insti.Constants;
+import app.insti.Helpers;
 import app.insti.R;
 import app.insti.ShareURLMaker;
 import app.insti.activity.MainActivity;
@@ -198,7 +199,7 @@ public class BodyFragment extends BackHandledFragment {
 
         /* Set body information */
         bodyName.setText(body.getBodyName());
-        Picasso.get().load(body.getBodyImageURL()).into(bodyPicture);
+        Helpers.loadImageWithPlaceholder(bodyPicture, body.getBodyImageURL());
 
         bodyPicture.setOnClickListener(new View.OnClickListener() {
             @Override

app/src/main/java/app/insti/fragment/EventFragment.java

@@ -41,6 +41,7 @@ import java.util.Date;
 import java.util.List;
 
 import app.insti.Constants;
+import app.insti.Helpers;
 import app.insti.R;
 import app.insti.ShareURLMaker;
 import app.insti.activity.MainActivity;
@@ -152,7 +153,8 @@ public class EventFragment extends BackHandledFragment {
         webEventButton = getActivity().findViewById(R.id.web_event_button);
         shareEventButton = getActivity().findViewById(R.id.share_event_button);
 
-        Picasso.get().load(event.getEventImageURL()).into(eventPicture);
+        Helpers.loadImageWithPlaceholder(eventPicture, event.getEventImageURL());
+
         eventTitle.setText(event.getEventName());
         Markwon.setMarkdown(eventDescription, event.getEventDescription());
         Timestamp timestamp = event.getEventStartTime();