Map the transition between attachments and viewer

This only works on the "way back" if the viewer displays the same image that has been opened.

1 files changed, 24 insertions, 0 deletions

diff --git a/app/src/main/java/it/niedermann/nextcloud/deck/ui/attachments/AttachmentAdapter.java b/app/src/main/java/it/niedermann/nextcloud/deck/ui/attachments/AttachmentAdapter.java
index 1d7307ccd..d5a692dc8 100644
--- a/app/src/main/java/it/niedermann/nextcloud/deck/ui/attachments/AttachmentAdapter.java
+++ b/app/src/main/java/it/niedermann/nextcloud/deck/ui/attachments/AttachmentAdapter.java
@@ -1,14 +1,21 @@
 package it.niedermann.nextcloud.deck.ui.attachments;
 
 import android.content.Context;
+import android.graphics.drawable.Drawable;
 import android.os.Build;
 import android.view.LayoutInflater;
 import android.view.ViewGroup;
 
 import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+import androidx.appcompat.app.AppCompatActivity;
 import androidx.recyclerview.widget.RecyclerView;
 
 import com.bumptech.glide.Glide;
+import com.bumptech.glide.load.DataSource;
+import com.bumptech.glide.load.engine.GlideException;
+import com.bumptech.glide.request.RequestListener;
+import com.bumptech.glide.request.target.Target;
 
 import java.util.List;
 
@@ -52,6 +59,23 @@ public class AttachmentAdapter extends RecyclerView.Adapter<AttachmentAdapter.At
                 holder.binding.preview.setImageResource(R.drawable.ic_image_grey600_24dp);
                 Glide.with(context)
                         .load(uri)
+                        .listener(new RequestListener<Drawable>() {
+                            @Override
+                            public boolean onLoadFailed(@Nullable GlideException e, Object model,
+                                                        Target<Drawable> target, boolean isFirstResource) {
+                                // TODO better cast check
+                                ((AppCompatActivity) context).supportStartPostponedEnterTransition();
+                                return false;
+                            }
+
+                            @Override
+                            public boolean onResourceReady(Drawable resource, Object model,
+                                                           Target<Drawable> target, DataSource dataSource, boolean isFirstResource) {
+                                // TODO better cast check
+                                ((AppCompatActivity) context).supportStartPostponedEnterTransition();
+                                return false;
+                            }
+                        })
                         .error(R.drawable.ic_image_grey600_24dp)
                         .into(holder.binding.preview);
             }