add blink animation

Signed-off-by: alperozturk <alper_ozturk@proton.me>

Author: alperozturk96

app/src/main/java/com/owncloud/android/ui/fragment/FileDetailSharingFragment.java

@@ -30,6 +30,8 @@
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
+import android.view.animation.Animation;
+import android.view.animation.AnimationUtils;
 
 import com.nextcloud.client.account.User;
 import com.nextcloud.client.account.UserAccountManager;
@@ -158,21 +160,32 @@ public void onCreate(@Nullable Bundle savedInstanceState) {
         shareRepository.refreshSharesForFile(file.getRemotePath(), () -> {
             refreshCapabilitiesFromDB();
             refreshSharesFromDB();
-            binding.shimmerLayout.setVisibility(View.GONE);
-            binding.shareContainer.setVisibility(View.VISIBLE);
+            showShareContainer();
             return Unit.INSTANCE;
         }, () -> {
-            binding.shimmerLayout.setVisibility(View.GONE);
-            binding.shareContainer.setVisibility(View.VISIBLE);
+            showShareContainer();
             DisplayUtils.showSnackMessage(getView(), R.string.error_fetching_sharees);
             return Unit.INSTANCE;
         });
     }
 
+    private void showShareContainer() {
+        if (binding == null) {
+            return;
+        }
+
+        binding.shimmerLayout.clearAnimation();
+        binding.shimmerLayout.setVisibility(View.GONE);
+        binding.shareContainer.setVisibility(View.VISIBLE);
+    }
+
     @Override
     public View onCreateView(@NonNull LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
         binding = FileDetailsSharingFragmentBinding.inflate(inflater, container, false);
 
+        final Animation blinkAnimation = AnimationUtils.loadAnimation(requireContext(), R.anim.blink);
+        binding.shimmerLayout.startAnimation(blinkAnimation);
+
         fileOperationsHelper = fileActivity.getFileOperationsHelper();
 
         AccountManager accountManager = AccountManager.get(requireContext());

app/src/main/res/anim/blink.xml

@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  ~ Nextcloud - Android Client
+  ~
+  ~ SPDX-FileCopyrightText: 2025 Alper Ozturk <alper.ozturk@nextcloud.com>
+  ~ SPDX-License-Identifier: AGPL-3.0-or-later OR GPL-2.0-only
+-->
+<alpha xmlns:android="http://schemas.android.com/apk/res/android"
+    android:duration="1000"
+    android:fromAlpha="1.0"
+    android:toAlpha="0.0"
+    android:repeatMode="reverse"
+    android:repeatCount="infinite" />