feat(gallery): 로딩 다이얼로그 표시 및 이미지 캐싱 적용

Fragment에서 isLoading에 따라 Loading Dialog를 표시/해제.
Glide에 디스크 캐싱 적용으로 스크롤 성능 개선.

app/src/main/java/kr/co/vividnext/sodalive/chat/character/detail/gallery/CharacterGalleryAdapter.kt

@@ -6,6 +6,7 @@ import android.view.View
 import android.view.ViewGroup
 import androidx.recyclerview.widget.RecyclerView
 import com.bumptech.glide.Glide
+import com.bumptech.glide.load.engine.DiskCacheStrategy
 import kr.co.vividnext.sodalive.databinding.ItemCharacterGalleryBinding
 
 class CharacterGalleryAdapter(
@@ -19,6 +20,7 @@ class CharacterGalleryAdapter(
         fun bind(item: CharacterImageListItemResponse) {
             Glide.with(binding.ivImage)
                 .load(item.imageUrl)
+                .diskCacheStrategy(DiskCacheStrategy.AUTOMATIC)
                 .into(binding.ivImage)
 
             if (item.isOwned) {

app/src/main/java/kr/co/vividnext/sodalive/chat/character/detail/gallery/CharacterGalleryFragment.kt

@@ -10,6 +10,7 @@ import androidx.recyclerview.widget.RecyclerView
 import kr.co.vividnext.sodalive.base.BaseFragment
 import kr.co.vividnext.sodalive.chat.character.detail.CharacterDetailActivity.Companion.EXTRA_CHARACTER_ID
 import kr.co.vividnext.sodalive.common.GridSpacingItemDecoration
+import kr.co.vividnext.sodalive.common.LoadingDialog
 import kr.co.vividnext.sodalive.databinding.FragmentCharacterGalleryBinding
 import kr.co.vividnext.sodalive.extensions.dpToPx
 import org.koin.androidx.viewmodel.ext.android.viewModel
@@ -21,7 +22,9 @@ class CharacterGalleryFragment : BaseFragment<FragmentCharacterGalleryBinding>(
     FragmentCharacterGalleryBinding::inflate
 ) {
     private val viewModel: CharacterGalleryViewModel by viewModel()
+
     private lateinit var adapter: CharacterGalleryAdapter
+    private lateinit var loadingDialog: LoadingDialog
 
     private val characterId: Long by lazy {
         arguments?.getLong("arg_character_id")
@@ -30,8 +33,11 @@ class CharacterGalleryFragment : BaseFragment<FragmentCharacterGalleryBinding>(
 
     override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
         super.onViewCreated(view, savedInstanceState)
+
+        loadingDialog = LoadingDialog(requireActivity(), layoutInflater)
         setupRecyclerView()
         observeState()
+
         viewModel.loadInitial(characterId)
     }
 
@@ -70,6 +76,13 @@ class CharacterGalleryFragment : BaseFragment<FragmentCharacterGalleryBinding>(
                 View.GONE
             }
 
+            // 로딩 다이얼로그 표시/해제
+            if (state.isLoading) {
+                loadingDialog.show(screenWidth)
+            } else {
+                hideLoadingDialog()
+            }
+
             if (state.items.isNotEmpty() && !state.isLoading) {
                 binding.rvGallery.visibility = View.VISIBLE
                 binding.clRatio.visibility = View.VISIBLE
@@ -117,4 +130,13 @@ class CharacterGalleryFragment : BaseFragment<FragmentCharacterGalleryBinding>(
                 viewModel.purchaseImage(item.id, position)
             }.show()
     }
+
+    private fun hideLoadingDialog() {
+        loadingDialog.dismiss()
+    }
+
+    override fun onDestroyView() {
+        hideLoadingDialog()
+        super.onDestroyView()
+    }
 }

app/src/main/java/kr/co/vividnext/sodalive/chat/character/detail/gallery/CharacterGalleryViewModel.kt

@@ -39,7 +39,6 @@ class CharacterGalleryViewModel(
         isLastPage = false
         isRequesting = false
         accumulatedItems.clear()
-        _uiState.value = UiState(isLoading = true)
         request(page = currentPage)
     }
 
@@ -51,6 +50,7 @@ class CharacterGalleryViewModel(
     private fun request(page: Int) {
         val token = "Bearer ${SharedPreferenceManager.token}"
         isRequesting = true
+        _uiState.value = _uiState.value?.copy(isLoading = isRequesting || isPurchasing)
         compositeDisposable.add(
             repository.getCharacterImageList(
                 token = token,
@@ -63,6 +63,9 @@ class CharacterGalleryViewModel(
                 .subscribe({ response ->
                     val success = response.success
                     val data = response.data
+
+                    isRequesting = false
+
                     if (success && data != null) {
                         // 누적 처리
                         val newItems = data.items
@@ -88,18 +91,17 @@ class CharacterGalleryViewModel(
                         )
                     } else {
                         _uiState.value = _uiState.value?.copy(
-                            isLoading = false,
+                            isLoading = isRequesting || isPurchasing,
                             error = response.message ?: "갤러리 정보를 불러오지 못했습니다."
                         )
                     }
-                    isRequesting = false
                 }, { throwable ->
+                    isRequesting = false
                     Logger.e(throwable, throwable.message ?: "")
                     _uiState.value = _uiState.value?.copy(
-                        isLoading = false,
+                        isLoading = isRequesting || isPurchasing,
                         error = "네트워크 오류가 발생했습니다. 잠시 후 다시 시도해 주세요."
                     )
-                    isRequesting = false
                 })
         )
     }
@@ -112,13 +114,18 @@ class CharacterGalleryViewModel(
 
         val token = "Bearer ${SharedPreferenceManager.token}"
         isPurchasing = true
+        _uiState.value = _uiState.value?.copy(
+            isLoading = isRequesting || isPurchasing,
+        )
         compositeDisposable.add(
             repository.purchaseCharacterImage(token = token, imageId = imageId)
                 .subscribeOn(Schedulers.io())
                 .observeOn(AndroidSchedulers.mainThread())
-                .subscribe({ response ->
+                .subscribe(
+                    { response ->
                         val success = response.success
                         val data = response.data
+                        isPurchasing = false
                         if (success && data != null) {
                             // 응답 imageUrl로 교체, 소유 상태 true로 변경
                             val updated = target.copy(
@@ -141,6 +148,7 @@ class CharacterGalleryViewModel(
                                 ownedCount = ownedAfter,
                                 ratio = ratio,
                                 items = accumulatedItems.toList(),
+                                isLoading = isRequesting || isPurchasing,
                                 error = null
                             )
                         } else {
@@ -148,14 +156,16 @@ class CharacterGalleryViewModel(
                                 error = response.message ?: "구매에 실패했습니다."
                             )
                         }
+                    },
+                    { throwable ->
                         isPurchasing = false
-                }, { throwable ->
                         Logger.e(throwable, throwable.message ?: "")
                         _uiState.value = _uiState.value?.copy(
+                            isLoading = isRequesting || isPurchasing,
                             error = "네트워크 오류가 발생했습니다. 잠시 후 다시 시도해 주세요."
                         )
-                    isPurchasing = false
-                })
+                    }
+                )
         )
     }
 }