diff --git a/wear/src/main/java/info/nightscout/androidaps/interaction/AAPSPreferences.java b/wear/src/main/java/info/nightscout/androidaps/interaction/AAPSPreferences.java
deleted file mode 100644
index 72f9f0a968..0000000000
--- a/wear/src/main/java/info/nightscout/androidaps/interaction/AAPSPreferences.java
+++ /dev/null
@@ -1,35 +0,0 @@
-package info.nightscout.androidaps.interaction;
-
-
-import android.os.Bundle;
-import android.view.View;
-import android.view.ViewGroup;
-
-import androidx.core.content.ContextCompat;
-
-import info.nightscout.androidaps.R;
-import preference.WearPreferenceActivity;
-
-public class AAPSPreferences extends WearPreferenceActivity {
-
-    @Override
-    protected void onCreate(Bundle savedInstanceState) {
-        super.onCreate(savedInstanceState);
-        addPreferencesFromResource(R.xml.preferences);
-        ViewGroup view = (ViewGroup) getWindow().getDecorView();
-        removeBackgroundRecursively(view);
-        view.setBackground(ContextCompat.getDrawable(this, R.drawable.settings_background));
-        view.requestFocus();
-    }
-
-    void removeBackgroundRecursively(View parent) {
-        if (parent instanceof ViewGroup) {
-            ViewGroup group = (ViewGroup) parent;
-            for (int i = 0; i < group.getChildCount(); i++) {
-                removeBackgroundRecursively(group.getChildAt(i));
-            }
-        }
-        parent.setBackground(null);
-    }
-
-}
diff --git a/wear/src/main/java/info/nightscout/androidaps/interaction/AAPSPreferences.kt b/wear/src/main/java/info/nightscout/androidaps/interaction/AAPSPreferences.kt
new file mode 100644
index 0000000000..e02f3fb2ad
--- /dev/null
+++ b/wear/src/main/java/info/nightscout/androidaps/interaction/AAPSPreferences.kt
@@ -0,0 +1,29 @@
+package info.nightscout.androidaps.interaction
+
+import android.os.Bundle
+import android.view.View
+import android.view.ViewGroup
+import androidx.core.content.ContextCompat
+import info.nightscout.androidaps.R
+import preference.WearPreferenceActivity
+
+class AAPSPreferences : WearPreferenceActivity() {
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        addPreferencesFromResource(R.xml.preferences)
+        val view = window.decorView as ViewGroup
+        removeBackgroundRecursively(view)
+        view.background = ContextCompat.getDrawable(this, R.drawable.settings_background)
+        view.requestFocus()
+    }
+
+    private fun removeBackgroundRecursively(parent: View) {
+        if (parent is ViewGroup) {
+            for (i in 0 until parent.childCount) {
+                removeBackgroundRecursively(parent.getChildAt(i))
+            }
+        }
+        parent.background = null
+    }
+}
\ No newline at end of file