diff --git a/app/src/main/java/com/sw/dualscreen/utils/SpTool.java b/app/src/main/java/com/sw/dualscreen/utils/SpTool.kt
similarity index 100%
rename from app/src/main/java/com/sw/dualscreen/utils/SpTool.java
rename to app/src/main/java/com/sw/dualscreen/utils/SpTool.kt