diff --git a/Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/features/input/ui/MotionAlertDialog.java b/Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/features/input/ui/MotionAlertDialog.java
deleted file mode 100644
index 9872bdd01e..0000000000
--- a/Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/features/input/ui/MotionAlertDialog.java
+++ /dev/null
@@ -1,99 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-or-later
-
-package org.dolphinemu.dolphinemu.features.input.ui;
-
-import android.app.Activity;
-import android.view.InputDevice;
-import android.view.KeyEvent;
-import android.view.MotionEvent;
-
-import androidx.annotation.NonNull;
-import androidx.appcompat.app.AlertDialog;
-
-import org.dolphinemu.dolphinemu.features.input.model.ControllerInterface;
-import org.dolphinemu.dolphinemu.features.input.model.MappingCommon;
-import org.dolphinemu.dolphinemu.features.input.model.view.InputMappingControlSetting;
-
-/**
- * {@link AlertDialog} derivative that listens for
- * motion events from controllers and joysticks.
- */
-public final class MotionAlertDialog extends AlertDialog
-{
-  private final Activity mActivity;
-  private final InputMappingControlSetting mSetting;
-  private final boolean mAllDevices;
-  private boolean mRunning = false;
-
-  /**
-   * Constructor
-   *
-   * @param activity   The current {@link Activity}.
-   * @param setting    The setting to show this dialog for.
-   * @param allDevices Whether to detect inputs from devices other than the configured one.
-   */
-  public MotionAlertDialog(Activity activity, InputMappingControlSetting setting,
-          boolean allDevices)
-  {
-    super(activity);
-
-    mActivity = activity;
-    mSetting = setting;
-    mAllDevices = allDevices;
-  }
-
-  @Override
-  protected void onStart()
-  {
-    super.onStart();
-
-    mRunning = true;
-    new Thread(() ->
-    {
-      String result = MappingCommon.detectInput(mSetting.getController(), mAllDevices);
-      mActivity.runOnUiThread(() ->
-      {
-        if (mRunning)
-        {
-          mSetting.setValue(result);
-          dismiss();
-        }
-      });
-    }).start();
-  }
-
-  @Override
-  protected void onStop()
-  {
-    super.onStop();
-    mRunning = false;
-  }
-
-  @Override
-  public boolean dispatchKeyEvent(KeyEvent event)
-  {
-    ControllerInterface.dispatchKeyEvent(event);
-
-    if (event.getKeyCode() == KeyEvent.KEYCODE_BACK && event.isLongPress())
-    {
-      // Special case: Let the user cancel by long-pressing Back (intended for non-touch devices)
-      mSetting.clearValue();
-      dismiss();
-    }
-
-    return true;
-  }
-
-  @Override
-  public boolean dispatchGenericMotionEvent(@NonNull MotionEvent event)
-  {
-    if ((event.getSource() & InputDevice.SOURCE_CLASS_POINTER) != 0)
-    {
-      // Special case: Let the user cancel by touching an on-screen button
-      return super.dispatchGenericMotionEvent(event);
-    }
-
-    ControllerInterface.dispatchGenericMotionEvent(event);
-    return true;
-  }
-}
diff --git a/Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/features/input/ui/MotionAlertDialog.kt b/Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/features/input/ui/MotionAlertDialog.kt
new file mode 100644
index 0000000000..ff4a278f4c
--- /dev/null
+++ b/Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/features/input/ui/MotionAlertDialog.kt
@@ -0,0 +1,68 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+package org.dolphinemu.dolphinemu.features.input.ui
+
+import android.app.Activity
+import android.view.InputDevice
+import android.view.KeyEvent
+import android.view.MotionEvent
+import androidx.appcompat.app.AlertDialog
+import org.dolphinemu.dolphinemu.features.input.model.ControllerInterface
+import org.dolphinemu.dolphinemu.features.input.model.MappingCommon
+import org.dolphinemu.dolphinemu.features.input.model.view.InputMappingControlSetting
+
+/**
+ * [AlertDialog] derivative that listens for
+ * motion events from controllers and joysticks.
+ *
+ * @param activity   The current [Activity].
+ * @param setting    The setting to show this dialog for.
+ * @param allDevices Whether to detect inputs from devices other than the configured one.
+ */
+class MotionAlertDialog(
+    private val activity: Activity,
+    private val setting: InputMappingControlSetting,
+    private val allDevices: Boolean
+) : AlertDialog(activity) {
+    private var running = false
+
+    override fun onStart() {
+        super.onStart()
+
+        running = true
+        Thread {
+            val result = MappingCommon.detectInput(setting.controller, allDevices)
+            activity.runOnUiThread {
+                if (running) {
+                    setting.value = result
+                    dismiss()
+                }
+            }
+        }.start()
+    }
+
+    override fun onStop() {
+        super.onStop()
+        running = false
+    }
+
+    override fun dispatchKeyEvent(event: KeyEvent): Boolean {
+        ControllerInterface.dispatchKeyEvent(event)
+        if (event.keyCode == KeyEvent.KEYCODE_BACK && event.isLongPress) {
+            // Special case: Let the user cancel by long-pressing Back (intended for non-touch devices)
+            setting.clearValue()
+            dismiss()
+        }
+        return true
+    }
+
+    override fun dispatchGenericMotionEvent(event: MotionEvent): Boolean {
+        if (event.source and InputDevice.SOURCE_CLASS_POINTER != 0) {
+            // Special case: Let the user cancel by touching an on-screen button
+            return super.dispatchGenericMotionEvent(event)
+        }
+
+        ControllerInterface.dispatchGenericMotionEvent(event)
+        return true
+    }
+}