diff --git a/app/src/main/java/com/hippo/ehviewer/ui/legacy/DrawerView.java b/app/src/main/java/com/hippo/ehviewer/ui/legacy/DrawerView.kt
similarity index 100%
rename from app/src/main/java/com/hippo/ehviewer/ui/legacy/DrawerView.java
rename to app/src/main/java/com/hippo/ehviewer/ui/legacy/DrawerView.kt
diff --git a/app/src/main/java/com/hippo/ehviewer/ui/legacy/GalleryRatingBar.java b/app/src/main/java/com/hippo/ehviewer/ui/legacy/GalleryRatingBar.kt
similarity index 100%
rename from app/src/main/java/com/hippo/ehviewer/ui/legacy/GalleryRatingBar.java
rename to app/src/main/java/com/hippo/ehviewer/ui/legacy/GalleryRatingBar.kt
diff --git a/app/src/main/java/com/hippo/ehviewer/ui/legacy/IndicatingListView.java b/app/src/main/java/com/hippo/ehviewer/ui/legacy/IndicatingListView.kt
similarity index 100%
rename from app/src/main/java/com/hippo/ehviewer/ui/legacy/IndicatingListView.java
rename to app/src/main/java/com/hippo/ehviewer/ui/legacy/IndicatingListView.kt
diff --git a/app/src/main/java/com/hippo/ehviewer/ui/legacy/LinkifyTextView.java b/app/src/main/java/com/hippo/ehviewer/ui/legacy/LinkifyTextView.kt
similarity index 100%
rename from app/src/main/java/com/hippo/ehviewer/ui/legacy/LinkifyTextView.java
rename to app/src/main/java/com/hippo/ehviewer/ui/legacy/LinkifyTextView.kt
diff --git a/app/src/main/java/com/hippo/ehviewer/ui/legacy/ObservedTextView.java b/app/src/main/java/com/hippo/ehviewer/ui/legacy/ObservedTextView.kt
similarity index 100%
rename from app/src/main/java/com/hippo/ehviewer/ui/legacy/ObservedTextView.java
rename to app/src/main/java/com/hippo/ehviewer/ui/legacy/ObservedTextView.kt