[AND-464] Provide custom ImageLoader to MediaGalleryPreviewActivity.

CHANGELOG.md

@@ -75,6 +75,7 @@
 ### 🐞 Fixed
 - Fix audio recording attachments not paused when the app goes to the background or the screen is covered with another one. [#5685](https://github.com/GetStream/stream-chat-android/pull/5685)
 - Fix crash when multiple answers field is not a valid number when creating a poll. [#5733](https://github.com/GetStream/stream-chat-android/pull/5733)
+- Ensure the `ImageLoader` created by a custom `StreamCoilImageLoaderFactory` is passed to the `MediaGalleryPreviewActivity`. [#5736](https://github.com/GetStream/stream-chat-android/pull/5736)
 
 ### ⬆️ Improved
 - Improve the images loading. [#5724](https://github.com/GetStream/stream-chat-android/pull/5724)

stream-chat-android-compose/src/main/java/io/getstream/chat/android/compose/ui/attachments/content/MediaAttachmentContent.kt

@@ -40,6 +40,7 @@ import androidx.compose.material3.Icon
 import androidx.compose.material3.Text
 import androidx.compose.material3.ripple
 import androidx.compose.runtime.Composable
+import androidx.compose.runtime.LaunchedEffect
 import androidx.compose.runtime.derivedStateOf
 import androidx.compose.runtime.getValue
 import androidx.compose.runtime.remember
@@ -61,9 +62,11 @@ import io.getstream.chat.android.client.utils.attachment.isVideo
 import io.getstream.chat.android.compose.R
 import io.getstream.chat.android.compose.state.mediagallerypreview.MediaGalleryPreviewResult
 import io.getstream.chat.android.compose.state.messages.attachments.AttachmentState
+import io.getstream.chat.android.compose.ui.attachments.preview.MediaGalleryInjector
 import io.getstream.chat.android.compose.ui.attachments.preview.MediaGalleryPreviewContract
 import io.getstream.chat.android.compose.ui.components.ShimmerProgressIndicator
 import io.getstream.chat.android.compose.ui.theme.ChatTheme
+import io.getstream.chat.android.compose.ui.util.LocalStreamImageLoader
 import io.getstream.chat.android.compose.ui.util.StreamAsyncImage
 import io.getstream.chat.android.models.Attachment
 import io.getstream.chat.android.models.AttachmentType
@@ -116,6 +119,12 @@ public fun MediaAttachmentContent(
     val (message, _, onLongItemClick, onMediaGalleryPreviewResult) = attachmentState
     val gridSpacing = ChatTheme.dimens.attachmentsContentMediaGridSpacing
 
+    // Prepare the image loader for the media gallery
+    val imageLoader = LocalStreamImageLoader.current
+    LaunchedEffect(imageLoader) {
+        MediaGalleryInjector.install(imageLoader)
+    }
+
     Row(
         modifier
             .clip(ChatTheme.shapes.attachment)

stream-chat-android-compose/src/main/java/io/getstream/chat/android/compose/ui/attachments/preview/MediaGalleryInjector.kt

@@ -0,0 +1,43 @@
+/*
+ * Copyright (c) 2014-2025 Stream.io Inc. All rights reserved.
+ *
+ * Licensed under the Stream License;
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    https://github.com/GetStream/stream-chat-android/blob/main/LICENSE
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package io.getstream.chat.android.compose.ui.attachments.preview
+
+import coil3.ImageLoader
+
+/**
+ * Injector for non-configuration dependencies of the Media Gallery Activity.
+ * Serves a bridge the Activity/Fragment which hosts the `MessageList` and the `MediaGalleryPreviewActivity`,
+ * providing values passed in the `ChatTheme` holding the `MessageList` to the `MediaGalleryPreviewActivity`.
+ */
+internal object MediaGalleryInjector {
+
+    /**
+     * The [ImageLoader] instance.
+     */
+    @Volatile
+    var imageLoader: ImageLoader? = null
+        internal set
+
+    /**
+     * Sets the [ImageLoader] instance.
+     *
+     * @param imageLoader The [ImageLoader] instance to set.
+     */
+    fun install(imageLoader: ImageLoader) {
+        this.imageLoader = imageLoader
+    }
+}

stream-chat-android-compose/src/main/java/io/getstream/chat/android/compose/ui/attachments/preview/MediaGalleryPreviewActivity.kt

@@ -33,6 +33,7 @@ import androidx.compose.foundation.layout.WindowInsets
 import androidx.compose.foundation.layout.systemBars
 import androidx.compose.foundation.layout.windowInsetsPadding
 import androidx.compose.runtime.Composable
+import androidx.compose.runtime.CompositionLocalProvider
 import androidx.compose.runtime.LaunchedEffect
 import androidx.compose.runtime.MutableState
 import androidx.compose.ui.Modifier
@@ -55,6 +56,7 @@ import io.getstream.chat.android.compose.state.mediagallerypreview.ShowInChat
 import io.getstream.chat.android.compose.state.mediagallerypreview.toMediaGalleryPreviewActivityState
 import io.getstream.chat.android.compose.state.mediagallerypreview.toMessage
 import io.getstream.chat.android.compose.ui.theme.ChatTheme
+import io.getstream.chat.android.compose.ui.util.LocalStreamImageLoader
 import io.getstream.chat.android.compose.util.attachmentDownloadState
 import io.getstream.chat.android.compose.util.onDownloadHandleRequest
 import io.getstream.chat.android.compose.viewmodel.mediapreview.MediaGalleryPreviewViewModel
@@ -161,7 +163,6 @@ public class MediaGalleryPreviewActivity : AppCompatActivity() {
                 SetupEdgeToEdge()
 
                 val message = mediaGalleryPreviewViewModel.message
-
                 if (message.isDeleted()) {
                     finish()
                     return@ChatTheme
@@ -171,24 +172,30 @@ public class MediaGalleryPreviewActivity : AppCompatActivity() {
                 val downloadAttachmentUriGenerator = ChatTheme.streamDownloadAttachmentUriGenerator
                 val downloadRequestInterceptor = ChatTheme.streamDownloadRequestInterceptor
 
-                MediaGalleryPreviewScreen(
-                    modifier = Modifier.windowInsetsPadding(WindowInsets.systemBars),
-                    viewModel = mediaGalleryPreviewViewModel,
-                    initialPage = attachmentPosition,
-                    onHeaderLeadingContentClick = ::finish,
-                    onOptionClick = { attachment, option ->
-                        handleMediaAction(
-                            attachment,
-                            option.action,
-                            writePermissionState,
-                            downloadPayload,
-                            downloadAttachmentUriGenerator::generateDownloadUri,
-                            downloadRequestInterceptor::intercept,
-                        )
-                    },
-                    onRequestShareAttachment = ::onRequestShareAttachment,
-                    onConfirmShareAttachment = ::shareAttachment,
-                )
+                // Take the imageLoader from the injector, which is populated by the MediaAttachmentContent. This is a
+                // workaround for the fact that the MediaGalleryPreviewActivity is not a part of the composition tree of
+                // the MessageList, so the provided imageLoaderFactory from the MessageList ChatTheme cannot be used.
+                val imageLoader = MediaGalleryInjector.imageLoader ?: LocalStreamImageLoader.current
+                CompositionLocalProvider(LocalStreamImageLoader provides imageLoader) {
+                    MediaGalleryPreviewScreen(
+                        modifier = Modifier.windowInsetsPadding(WindowInsets.systemBars),
+                        viewModel = mediaGalleryPreviewViewModel,
+                        initialPage = attachmentPosition,
+                        onHeaderLeadingContentClick = ::finish,
+                        onOptionClick = { attachment, option ->
+                            handleMediaAction(
+                                attachment,
+                                option.action,
+                                writePermissionState,
+                                downloadPayload,
+                                downloadAttachmentUriGenerator::generateDownloadUri,
+                                downloadRequestInterceptor::intercept,
+                            )
+                        },
+                        onRequestShareAttachment = ::onRequestShareAttachment,
+                        onConfirmShareAttachment = ::shareAttachment,
+                    )
+                }
             }
         }
     }