Add hardware keyboard detection on Android

source/funkin/external/android/KeyboardUtil.hx

@@ -0,0 +1,26 @@
+package funkin.external.android;
+
+#if android
+import lime.system.JNI;
+
+/**
+ * Utility class for keyboard detection.
+ */
+class KeyboardUtil
+{
+  /**
+   * Returns `true` if a keyboard is currently connected to the device.
+   */
+  public static var keyboardConnected(get, never):Bool;
+
+  @:noCompletion
+  static function get_keyboardConnected():Bool
+  {
+    final method:Null<Dynamic> = JNIUtil.createStaticMethod('funkin/util/KeyboardUtil', 'isKeyboardConnected', '()Z');
+
+    if (method == null) return false;
+
+    return inline JNI.callStatic(method, []);
+  }
+}
+#end

source/funkin/external/android/java/funkin/util/KeyboardUtil.java

@@ -0,0 +1,14 @@
+package funkin.util;
+
+import org.haxe.extension.Extension;
+
+public class KeyboardUtil
+{
+  public static boolean isKeyboardConnected()
+  {
+    if (Extension.mainContext == null) return false;
+
+    // KEYBOARD_UNDEFINED = 0, KEYBOARD_NOKEYS = 1
+    return Extension.mainContext.getResources().getConfiguration().keyboard > 1;
+  }
+}

source/funkin/mobile/input/ControlsHandler.hx

@@ -10,6 +10,9 @@ import funkin.mobile.ui.FunkinHitbox;
 import funkin.play.notes.NoteDirection;
 import openfl.events.KeyboardEvent;
 import openfl.events.TouchEvent;
+#if android
+import funkin.external.android.KeyboardUtil;
+#end
 
 /**
  * Handles setting up and managing input controls for the game.
@@ -125,7 +128,7 @@ class ControlsHandler
   @:noCompletion
   private static function get_hasExternalInputDevice():Bool
   {
-    return FlxG.gamepads.numActiveGamepads > 0 #if android || extension.androidtools.Tools.isChromebook() #end;
+    return FlxG.gamepads.numActiveGamepads > 0 #if android || KeyboardUtil.keyboardConnected || extension.androidtools.Tools.isChromebook() #end;
   }
 
   @:noCompletion