diff --git a/app/src/main/java/com/hippo/ehviewer/client/EhCacheKeyFactory.kt b/app/src/main/java/com/hippo/ehviewer/client/EhCacheKeyFactory.kt
index d5446e96c..1dd933f2b 100644
--- a/app/src/main/java/com/hippo/ehviewer/client/EhCacheKeyFactory.kt
+++ b/app/src/main/java/com/hippo/ehviewer/client/EhCacheKeyFactory.kt
@@ -13,28 +13,10 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
+package com.hippo.ehviewer.client
 
-package com.hippo.ehviewer.client;
-
-public class EhCacheKeyFactory {
-
-    public static String getThumbKey(long gid) {
-        return "preview:large:" + gid + ":" + 0; // "thumb:" + gid;
+object EhCacheKeyFactory {
+    fun getImageKey(gid: Long, index: Int): String {
+        return "image:$gid:$index"
     }
-
-    public static String getNormalPreviewKey(long gid, int index) {
-        return "preview:normal:" + gid + ":" + index;
-    }
-
-    public static String getLargePreviewKey(long gid, int index) {
-        return "preview:large:" + gid + ":" + index;
-    }
-
-    public static String getLargePreviewSetKey(long gid, int index) {
-        return "large_preview_set:" + gid + ":" + index;
-    }
-
-    public static String getImageKey(long gid, int index) {
-        return "image:" + gid + ":" + index;
-    }
-}
+}
\ No newline at end of file
diff --git a/app/src/main/java/com/hippo/ehviewer/client/data/GalleryPreview.kt b/app/src/main/java/com/hippo/ehviewer/client/data/GalleryPreview.kt
index ee8a6b039..984d7374c 100644
--- a/app/src/main/java/com/hippo/ehviewer/client/data/GalleryPreview.kt
+++ b/app/src/main/java/com/hippo/ehviewer/client/data/GalleryPreview.kt
@@ -21,8 +21,6 @@ import kotlinx.parcelize.Parcelize
 
 @Parcelize
 class GalleryPreview(
-    @JvmField
-    var imageKey: String? = null,
     @JvmField
     var imageUrl: String? = null,
     @JvmField
@@ -40,6 +38,6 @@ class GalleryPreview(
 ) : Parcelable {
     fun load(view: LoadImageView) {
         view.setClip(offsetX, offsetY, clipWidth, clipHeight)
-        view.load(imageKey!!, imageUrl!!)
+        view.load(imageUrl!!)
     }
 }
\ No newline at end of file
diff --git a/app/src/main/java/com/hippo/ehviewer/client/data/LargePreviewSet.kt b/app/src/main/java/com/hippo/ehviewer/client/data/LargePreviewSet.kt
index 318b2e481..29198b418 100644
--- a/app/src/main/java/com/hippo/ehviewer/client/data/LargePreviewSet.kt
+++ b/app/src/main/java/com/hippo/ehviewer/client/data/LargePreviewSet.kt
@@ -15,7 +15,6 @@
  */
 package com.hippo.ehviewer.client.data
 
-import com.hippo.ehviewer.client.EhCacheKeyFactory
 import com.hippo.widget.LoadImageView
 import com.hippo.yorozuya.collect.IntList
 
@@ -46,7 +45,6 @@ class LargePreviewSet(
     override fun getGalleryPreview(gid: Long, index: Int): GalleryPreview {
         val galleryPreview = GalleryPreview()
         galleryPreview.position = mPositionList[index]
-        galleryPreview.imageKey = EhCacheKeyFactory.getLargePreviewKey(gid, galleryPreview.position)
         galleryPreview.imageUrl = mImageUrlList[index]
         galleryPreview.pageUrl = mPageUrlList[index]
         return galleryPreview
@@ -55,7 +53,6 @@ class LargePreviewSet(
     override fun load(view: LoadImageView, gid: Long, index: Int) {
         view.resetClip()
         view.load(
-            EhCacheKeyFactory.getLargePreviewKey(gid, mPositionList[index]),
             mImageUrlList[index]
         )
     }
diff --git a/app/src/main/java/com/hippo/ehviewer/client/data/NormalPreviewSet.kt b/app/src/main/java/com/hippo/ehviewer/client/data/NormalPreviewSet.kt
index 751f29b83..d96c4872c 100644
--- a/app/src/main/java/com/hippo/ehviewer/client/data/NormalPreviewSet.kt
+++ b/app/src/main/java/com/hippo/ehviewer/client/data/NormalPreviewSet.kt
@@ -20,7 +20,6 @@ import com.hippo.yorozuya.collect.IntList
 
 class NormalPreviewSet(
     private var mPositionList: IntList = IntList(),
-    private var mImageKeyList: ArrayList<String> = ArrayList(),
     private var mImageUrlList: ArrayList<String> = ArrayList(),
     private var mOffsetXList: IntList = IntList(),
     private var mOffsetYList: IntList = IntList(),
@@ -29,21 +28,11 @@ class NormalPreviewSet(
     private var mPageUrlList: ArrayList<String> = ArrayList()
 ) : PreviewSet() {
 
-    private fun getImageKey(imageUrl: String): String {
-        val index = imageUrl.indexOf('/')
-        return if (index >= 0) {
-            imageUrl.substring(index + 1)
-        } else {
-            imageUrl
-        }
-    }
-
     fun addItem(
         position: Int, imageUrl: String, xOffset: Int, yOffset: Int, width: Int,
         height: Int, pageUrl: String
     ) {
         mPositionList.add(position)
-        mImageKeyList.add(getImageKey(imageUrl))
         mImageUrlList.add(imageUrl)
         mOffsetXList.add(xOffset)
         mOffsetYList.add(yOffset)
@@ -67,7 +56,6 @@ class NormalPreviewSet(
     override fun getGalleryPreview(gid: Long, index: Int): GalleryPreview {
         val galleryPreview = GalleryPreview()
         galleryPreview.position = mPositionList[index]
-        galleryPreview.imageKey = mImageKeyList[index]
         galleryPreview.imageUrl = mImageUrlList[index]
         galleryPreview.pageUrl = mPageUrlList[index]
         galleryPreview.offsetX = mOffsetXList[index]
@@ -82,6 +70,6 @@ class NormalPreviewSet(
             mOffsetXList[index], mOffsetYList[index],
             mClipWidthList[index], mClipHeightList[index]
         )
-        view.load(mImageKeyList[index], mImageUrlList[index])
+        view.load(mImageUrlList[index])
     }
 }
\ No newline at end of file
diff --git a/app/src/main/java/com/hippo/ehviewer/ui/scene/DownloadsScene.kt b/app/src/main/java/com/hippo/ehviewer/ui/scene/DownloadsScene.kt
index 413314597..a436d2df2 100644
--- a/app/src/main/java/com/hippo/ehviewer/ui/scene/DownloadsScene.kt
+++ b/app/src/main/java/com/hippo/ehviewer/ui/scene/DownloadsScene.kt
@@ -55,7 +55,6 @@ import com.hippo.ehviewer.EhApplication.Companion.downloadManager
 import com.hippo.ehviewer.EhDB
 import com.hippo.ehviewer.R
 import com.hippo.ehviewer.Settings
-import com.hippo.ehviewer.client.EhCacheKeyFactory
 import com.hippo.ehviewer.client.EhUtils
 import com.hippo.ehviewer.dao.DownloadInfo
 import com.hippo.ehviewer.download.DownloadManager
@@ -1023,7 +1022,7 @@ class DownloadsScene : BaseToolbarScene(), DownloadInfoListener, OnClickFabListe
             }
             val info = mList!![position]
             info.thumb?.let {
-                holder.thumb.load(EhCacheKeyFactory.getThumbKey(info.gid), EhUtils.fixThumbUrl(it))
+                holder.thumb.load(EhUtils.fixThumbUrl(it))
             }
             holder.title.text = EhUtils.getSuitableTitle(info)
             holder.uploader.text = info.uploader
diff --git a/app/src/main/java/com/hippo/ehviewer/ui/scene/GalleryAdapter.kt b/app/src/main/java/com/hippo/ehviewer/ui/scene/GalleryAdapter.kt
index 297246a49..e43c371e7 100644
--- a/app/src/main/java/com/hippo/ehviewer/ui/scene/GalleryAdapter.kt
+++ b/app/src/main/java/com/hippo/ehviewer/ui/scene/GalleryAdapter.kt
@@ -29,7 +29,6 @@ import com.hippo.easyrecyclerview.MarginItemDecoration
 import com.hippo.ehviewer.EhApplication.Companion.downloadManager
 import com.hippo.ehviewer.R
 import com.hippo.ehviewer.Settings
-import com.hippo.ehviewer.client.EhCacheKeyFactory
 import com.hippo.ehviewer.client.EhUtils
 import com.hippo.ehviewer.client.data.GalleryInfo
 import com.hippo.ehviewer.dao.LocalFavoriteInfo
@@ -175,7 +174,7 @@ internal abstract class GalleryAdapter(
         }
         when (mType) {
             TYPE_LIST -> {
-                holder.thumb.load(EhCacheKeyFactory.getThumbKey(gi.gid), gi.thumb!!)
+                holder.thumb.load(gi.thumb!!)
                 holder.title!!.text = EhUtils.getSuitableTitle(gi)
                 holder.uploader!!.text = gi.uploader
                 holder.uploader.alpha = if (gi.disowned) .5f else 1f
@@ -209,7 +208,7 @@ internal abstract class GalleryAdapter(
 
             TYPE_GRID -> {
                 (holder.thumb as TileThumb).setThumbSize(gi.thumbWidth, gi.thumbHeight)
-                holder.thumb.load(EhCacheKeyFactory.getThumbKey(gi.gid), gi.thumb!!)
+                holder.thumb.load(gi.thumb!!)
                 val category: View = holder.category
                 var drawable = category.background
                 val color = EhUtils.getCategoryColor(gi.category)
diff --git a/app/src/main/java/com/hippo/ehviewer/ui/scene/GalleryDetailScene.kt b/app/src/main/java/com/hippo/ehviewer/ui/scene/GalleryDetailScene.kt
index 398a3c6d9..007abb121 100755
--- a/app/src/main/java/com/hippo/ehviewer/ui/scene/GalleryDetailScene.kt
+++ b/app/src/main/java/com/hippo/ehviewer/ui/scene/GalleryDetailScene.kt
@@ -62,7 +62,6 @@ import com.hippo.ehviewer.EhDB
 import com.hippo.ehviewer.R
 import com.hippo.ehviewer.Settings
 import com.hippo.ehviewer.UrlOpener
-import com.hippo.ehviewer.client.EhCacheKeyFactory
 import com.hippo.ehviewer.client.EhClient
 import com.hippo.ehviewer.client.EhFilter
 import com.hippo.ehviewer.client.EhRequest
@@ -512,7 +511,7 @@ class GalleryDetailScene : CollapsingToolbarScene(), View.OnClickListener, Downl
         mGalleryInfo?.let { gi ->
             if (mAction == ACTION_GALLERY_INFO) {
                 binding.content.header.run {
-                    (thumb as LoadImageView).load(EhCacheKeyFactory.getThumbKey(gi.gid), gi.thumb!!)
+                    (thumb as LoadImageView).load(gi.thumb!!)
                     setTitle(EhUtils.getSuitableTitle(gi))
                     uploader.text = gi.uploader
                     uploader.alpha = if (gi.disowned) .5f else 1f
@@ -568,7 +567,7 @@ class GalleryDetailScene : CollapsingToolbarScene(), View.OnClickListener, Downl
         _binding ?: return
         val resources = resources
         binding.content.header.run {
-            (thumb as LoadImageView).load(EhCacheKeyFactory.getThumbKey(gd.gid), gd.thumb!!, true)
+            (thumb as LoadImageView).load(gd.thumb!!, true)
             setTitle(EhUtils.getSuitableTitle(gd))
             uploader.text = gd.uploader
             uploader.isEnabled = !gd.disowned
diff --git a/app/src/main/java/com/hippo/ehviewer/ui/scene/HistoryScene.kt b/app/src/main/java/com/hippo/ehviewer/ui/scene/HistoryScene.kt
index 15e9b0c93..83d3beb39 100644
--- a/app/src/main/java/com/hippo/ehviewer/ui/scene/HistoryScene.kt
+++ b/app/src/main/java/com/hippo/ehviewer/ui/scene/HistoryScene.kt
@@ -38,7 +38,6 @@ import androidx.recyclerview.widget.StaggeredGridLayoutManager
 import com.hippo.app.BaseDialogBuilder
 import com.hippo.easyrecyclerview.HandlerDrawable
 import com.hippo.ehviewer.*
-import com.hippo.ehviewer.client.EhCacheKeyFactory
 import com.hippo.ehviewer.client.EhUtils
 import com.hippo.ehviewer.client.data.GalleryInfo
 import com.hippo.ehviewer.dao.DownloadInfo
@@ -397,7 +396,7 @@ class HistoryScene : BaseToolbarScene() {
             val gi: GalleryInfo? = getItem(position)
             gi ?: return
             gi.thumb?.let {
-                holder.thumb.load(EhCacheKeyFactory.getThumbKey(gi.gid), EhUtils.fixThumbUrl(it))
+                holder.thumb.load(EhUtils.fixThumbUrl(it))
             }
             holder.title.text = EhUtils.getSuitableTitle(gi)
             holder.uploader.text = gi.uploader
diff --git a/app/src/main/java/com/hippo/widget/LoadImageView.kt b/app/src/main/java/com/hippo/widget/LoadImageView.kt
index 2d7c8157a..3ec317751 100644
--- a/app/src/main/java/com/hippo/widget/LoadImageView.kt
+++ b/app/src/main/java/com/hippo/widget/LoadImageView.kt
@@ -128,7 +128,7 @@ open class LoadImageView @JvmOverloads constructor(
     }
 
     @JvmOverloads
-    fun load(key: String, url: String, isLoaded: Boolean = false) {
+    fun load(url: String, isLoaded: Boolean = false) {
         if ((mRequest?.data as? String?) == url)
             return
         mFailed = false