diff --git a/KeyHandler/Android.bp b/KeyHandler/Android.bp
index 7c8766f..be66272 100644
--- a/KeyHandler/Android.bp
+++ b/KeyHandler/Android.bp
@@ -1,7 +1,7 @@
 android_app {
     name: "KeyHandler",
 
-    srcs: ["src/**/*.java"],
+    srcs: ["src/**/*.kt"],
 
     certificate: "platform",
     platform_apis: true,
diff --git a/KeyHandler/src/org/lineageos/settings/device/KeyHandler.java b/KeyHandler/src/org/lineageos/settings/device/KeyHandler.java
deleted file mode 100644
index 1d3a296..0000000
--- a/KeyHandler/src/org/lineageos/settings/device/KeyHandler.java
+++ /dev/null
@@ -1,83 +0,0 @@
-/*
- * Copyright (C) 2018 The LineageOS Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * 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 org.lineageos.settings.device;
-
-import android.content.Context;
-import android.media.AudioManager;
-import android.os.VibrationEffect;
-import android.os.Vibrator;
-import android.view.KeyEvent;
-
-import com.android.internal.os.DeviceKeyHandler;
-
-public class KeyHandler implements DeviceKeyHandler {
-    private static final String TAG = KeyHandler.class.getSimpleName();
-
-    // Slider key codes
-    private static final int MODE_NORMAL = 601;
-    private static final int MODE_VIBRATION = 602;
-    private static final int MODE_SILENCE = 603;
-
-    // Vibration effects
-    private static final VibrationEffect MODE_NORMAL_EFFECT =
-            VibrationEffect.get(VibrationEffect.EFFECT_HEAVY_CLICK);
-    private static final VibrationEffect MODE_VIBRATION_EFFECT =
-            VibrationEffect.get(VibrationEffect.EFFECT_DOUBLE_CLICK);
-
-    private final Context mContext;
-    private final AudioManager mAudioManager;
-    private final Vibrator mVibrator;
-
-    public KeyHandler(Context context) {
-        mContext = context;
-
-        mAudioManager = mContext.getSystemService(AudioManager.class);
-        mVibrator = mContext.getSystemService(Vibrator.class);
-    }
-
-    public KeyEvent handleKeyEvent(KeyEvent event) {
-        if (event.getAction() != KeyEvent.ACTION_DOWN) {
-            return event;
-        }
-
-        int scanCode = event.getScanCode();
-
-        switch (scanCode) {
-            case MODE_NORMAL:
-                mAudioManager.setRingerModeInternal(AudioManager.RINGER_MODE_NORMAL);
-                doHapticFeedback(MODE_NORMAL_EFFECT);
-                break;
-            case MODE_VIBRATION:
-                mAudioManager.setRingerModeInternal(AudioManager.RINGER_MODE_VIBRATE);
-                doHapticFeedback(MODE_VIBRATION_EFFECT);
-                break;
-            case MODE_SILENCE:
-                mAudioManager.setRingerModeInternal(AudioManager.RINGER_MODE_SILENT);
-                break;
-            default:
-                return event;
-        }
-
-        return null;
-    }
-
-    private void doHapticFeedback(VibrationEffect effect) {
-        if (mVibrator != null && mVibrator.hasVibrator()) {
-            mVibrator.vibrate(effect);
-        }
-    }
-}
diff --git a/KeyHandler/src/org/lineageos/settings/device/KeyHandler.kt b/KeyHandler/src/org/lineageos/settings/device/KeyHandler.kt
new file mode 100644
index 0000000..6fbd6d3
--- /dev/null
+++ b/KeyHandler/src/org/lineageos/settings/device/KeyHandler.kt
@@ -0,0 +1,50 @@
+/*
+ * Copyright (C) 2021 The LineageOS Project
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+package org.lineageos.settings.device
+
+import android.content.Context
+import android.media.AudioManager
+import android.os.VibrationEffect
+import android.os.Vibrator
+import android.view.KeyEvent
+import com.android.internal.os.DeviceKeyHandler
+
+class KeyHandler(context: Context) : DeviceKeyHandler {
+    private val audioManager = context.getSystemService(AudioManager::class.java)
+    private val vibrator = context.getSystemService(Vibrator::class.java)
+
+    override fun handleKeyEvent(event: KeyEvent): KeyEvent {
+        if (event.action == KeyEvent.ACTION_DOWN) {
+            when (event.scanCode) {
+                MODE_NORMAL -> {
+                    audioManager.setRingerModeInternal(AudioManager.RINGER_MODE_NORMAL)
+                    vibrator.vibrate(MODE_NORMAL_EFFECT)
+                }
+                MODE_VIBRATION -> {
+                    audioManager.setRingerModeInternal(AudioManager.RINGER_MODE_VIBRATE)
+                    vibrator.vibrate(MODE_VIBRATION_EFFECT)
+                }
+                MODE_SILENCE -> {
+                    audioManager.setRingerModeInternal(AudioManager.RINGER_MODE_SILENT)
+                }
+            }
+        }
+        return event
+    }
+
+    companion object {
+        private const val TAG = "KeyHandler"
+
+        // Slider key codes
+        private const val MODE_NORMAL = 601
+        private const val MODE_VIBRATION = 602
+        private const val MODE_SILENCE = 603
+
+        // Vibration effects
+        private val MODE_NORMAL_EFFECT = VibrationEffect.get(VibrationEffect.EFFECT_HEAVY_CLICK)
+        private val MODE_VIBRATION_EFFECT = VibrationEffect.get(VibrationEffect.EFFECT_DOUBLE_CLICK)
+    }
+}