Android: Hardware keyboard connection status callback

Adds a DisplayServer method to register hardware keyboard connection change callback.

doc/classes/DisplayServer.xml

@@ -1204,6 +1204,14 @@
 				[b]Note:[/b] On iOS, this method has no effect if [member ProjectSettings.display/window/handheld/orientation] is not set to [constant SCREEN_SENSOR].
 			</description>
 		</method>
+		<method name="set_hardware_keyboard_connection_change_callback">
+			<return type="void" />
+			<param index="0" name="callable" type="Callable" />
+			<description>
+				Sets the [param callable] that should be called when hardware keyboard is connected/disconnected. [param callable] should accept a single [bool] parameter indicating whether the keyboard is connected (true) or disconnected (false).
+				[b]Note:[/b] This method is only implemented on Android.
+			</description>
+		</method>
 		<method name="set_icon">
 			<return type="void" />
 			<param index="0" name="image" type="Image" />

platform/android/display_server_android.cpp

@@ -145,6 +145,16 @@ void DisplayServerAndroid::emit_system_theme_changed() {
 	}
 }
 
+void DisplayServerAndroid::set_hardware_keyboard_connection_change_callback(const Callable &p_callable) {
+	hardware_keyboard_connection_changed = p_callable;
+}
+
+void DisplayServerAndroid::emit_hardware_keyboard_connection_changed(bool p_connected) {
+	if (hardware_keyboard_connection_changed.is_valid()) {
+		hardware_keyboard_connection_changed.call_deferred(p_connected);
+	}
+}
+
 void DisplayServerAndroid::clipboard_set(const String &p_text) {
 	GodotJavaWrapper *godot_java = OS_Android::get_singleton()->get_godot_java();
 	ERR_FAIL_NULL(godot_java);

platform/android/display_server_android.h

@@ -89,6 +89,7 @@ class DisplayServerAndroid : public DisplayServer {
 	Callable rect_changed_callback;
 
 	Callable system_theme_changed;
+	Callable hardware_keyboard_connection_changed;
 
 	Callable dialog_callback;
 	Callable input_dialog_callback;
@@ -114,11 +115,10 @@ public:
 	virtual void tts_resume() override;
 	virtual void tts_stop() override;
 
-	void emit_system_theme_changed();
-
 	virtual bool is_dark_mode_supported() const override;
 	virtual bool is_dark_mode() const override;
 	virtual void set_system_theme_change_callback(const Callable &p_callable) override;
+	void emit_system_theme_changed();
 
 	virtual void clipboard_set(const String &p_text) override;
 	virtual String clipboard_get() const override;
@@ -159,6 +159,8 @@ public:
 	virtual void virtual_keyboard_hide() override;
 	virtual int virtual_keyboard_get_height() const override;
 	virtual bool has_hardware_keyboard() const override;
+	virtual void set_hardware_keyboard_connection_change_callback(const Callable &p_callable) override;
+	void emit_hardware_keyboard_connection_changed(bool p_connected);
 
 	virtual void window_set_window_event_callback(const Callable &p_callable, WindowID p_window = MAIN_WINDOW_ID) override;
 	virtual void window_set_input_event_callback(const Callable &p_callable, WindowID p_window = MAIN_WINDOW_ID) override;

platform/android/java/lib/src/org/godotengine/godot/Godot.kt

@@ -77,7 +77,6 @@ import org.godotengine.godot.xr.XRMode
 import java.io.File
 import java.io.FileInputStream
 import java.io.InputStream
-import java.lang.Exception
 import java.security.MessageDigest
 import java.util.*
 import java.util.concurrent.atomic.AtomicBoolean

platform/android/java/lib/src/org/godotengine/godot/GodotLib.java

@@ -268,6 +268,11 @@ public class GodotLib {
 	 */
 	public static native void onNightModeChanged();
 
+	/**
+	 * Invoked on the hardware keyboard connected/disconnected.
+	 */
+	public static native void hardwareKeyboardConnected(boolean connected);
+
 	/**
 	 * Invoked on the file picker closed.
 	 */

platform/android/java/lib/src/org/godotengine/godot/input/GodotEditText.java

@@ -265,13 +265,6 @@ public class GodotEditText extends EditText {
 	}
 
 	public boolean hasHardwareKeyboard() {
-		Configuration config = getResources().getConfiguration();
-		boolean hasHardwareKeyboardConfig = config.keyboard != Configuration.KEYBOARD_NOKEYS &&
-				config.hardKeyboardHidden == Configuration.HARDKEYBOARDHIDDEN_NO;
-		if (hasHardwareKeyboardConfig) {
-			return true;
-		}
-
 		return mRenderView.getInputHandler().hasHardwareKeyboard();
 	}
 

platform/android/java/lib/src/org/godotengine/godot/input/GodotInputHandler.java

@@ -90,6 +90,7 @@ public class GodotInputHandler implements InputManager.InputDeviceListener, Sens
 
 	private int cachedRotation = -1;
 	private boolean overrideVolumeButtons = false;
+	private boolean hasHardwareKeyboardConfig = false;
 
 	public GodotInputHandler(Context context, Godot godot) {
 		this.godot = godot;
@@ -105,6 +106,9 @@ public class GodotInputHandler implements InputManager.InputDeviceListener, Sens
 		if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
 			this.scaleGestureDetector.setStylusScaleEnabled(true);
 		}
+		Configuration config = context.getResources().getConfiguration();
+		hasHardwareKeyboardConfig = config.keyboard != Configuration.KEYBOARD_NOKEYS &&
+				config.hardKeyboardHidden == Configuration.HARDKEYBOARDHIDDEN_NO;
 	}
 
 	/**
@@ -143,6 +147,9 @@ public class GodotInputHandler implements InputManager.InputDeviceListener, Sens
 	}
 
 	boolean hasHardwareKeyboard() {
+		if (hasHardwareKeyboardConfig) {
+			return true;
+		}
 		return !mHardwareKeyboardIds.isEmpty();
 	}
 
@@ -797,5 +804,12 @@ public class GodotInputHandler implements InputManager.InputDeviceListener, Sens
 
 	public void onConfigurationChanged(Configuration newConfig) {
 		updateCachedRotation();
+
+		boolean newHardwareKeyboardConfig = newConfig.keyboard != Configuration.KEYBOARD_NOKEYS &&
+				newConfig.hardKeyboardHidden == Configuration.HARDKEYBOARDHIDDEN_NO;
+		if (hasHardwareKeyboardConfig != newHardwareKeyboardConfig) {
+			hasHardwareKeyboardConfig = newHardwareKeyboardConfig;
+			GodotLib.hardwareKeyboardConnected(hasHardwareKeyboard());
+		}
 	}
 }

platform/android/java_godot_lib_jni.cpp

@@ -548,6 +548,13 @@ JNIEXPORT void JNICALL Java_org_godotengine_godot_GodotLib_onNightModeChanged(JN
 	}
 }
 
+JNIEXPORT void JNICALL Java_org_godotengine_godot_GodotLib_hardwareKeyboardConnected(JNIEnv *env, jclass clazz, jboolean p_connected) {
+	DisplayServerAndroid *ds = (DisplayServerAndroid *)DisplayServer::get_singleton();
+	if (ds) {
+		ds->emit_hardware_keyboard_connection_changed(p_connected);
+	}
+}
+
 JNIEXPORT void JNICALL Java_org_godotengine_godot_GodotLib_filePickerCallback(JNIEnv *env, jclass clazz, jboolean p_ok, jobjectArray p_selected_paths) {
 	DisplayServerAndroid *ds = (DisplayServerAndroid *)DisplayServer::get_singleton();
 	if (ds) {

platform/android/java_godot_lib_jni.h

@@ -68,6 +68,7 @@ JNIEXPORT void JNICALL Java_org_godotengine_godot_GodotLib_setEditorProjectMetad
 JNIEXPORT void JNICALL Java_org_godotengine_godot_GodotLib_setVirtualKeyboardHeight(JNIEnv *env, jclass clazz, jint p_height);
 JNIEXPORT void JNICALL Java_org_godotengine_godot_GodotLib_requestPermissionResult(JNIEnv *env, jclass clazz, jstring p_permission, jboolean p_result);
 JNIEXPORT void JNICALL Java_org_godotengine_godot_GodotLib_onNightModeChanged(JNIEnv *env, jclass clazz);
+JNIEXPORT void JNICALL Java_org_godotengine_godot_GodotLib_hardwareKeyboardConnected(JNIEnv *env, jclass clazz, jboolean p_connected);
 JNIEXPORT void JNICALL Java_org_godotengine_godot_GodotLib_filePickerCallback(JNIEnv *env, jclass clazz, jboolean p_ok, jobjectArray p_selected_paths);
 JNIEXPORT void JNICALL Java_org_godotengine_godot_GodotLib_onRendererResumed(JNIEnv *env, jclass clazz);
 JNIEXPORT void JNICALL Java_org_godotengine_godot_GodotLib_onRendererPaused(JNIEnv *env, jclass clazz);

servers/display_server.cpp

@@ -1033,6 +1033,7 @@ void DisplayServer::_bind_methods() {
 	ClassDB::bind_method(D_METHOD("virtual_keyboard_get_height"), &DisplayServer::virtual_keyboard_get_height);
 
 	ClassDB::bind_method(D_METHOD("has_hardware_keyboard"), &DisplayServer::has_hardware_keyboard);
+	ClassDB::bind_method(D_METHOD("set_hardware_keyboard_connection_change_callback", "callable"), &DisplayServer::set_hardware_keyboard_connection_change_callback);
 
 	ClassDB::bind_method(D_METHOD("cursor_set_shape", "shape"), &DisplayServer::cursor_set_shape);
 	ClassDB::bind_method(D_METHOD("cursor_get_shape"), &DisplayServer::cursor_get_shape);

servers/display_server.h

@@ -271,6 +271,7 @@ public:
 	virtual Color get_accent_color() const { return Color(0, 0, 0, 0); }
 	virtual Color get_base_color() const { return Color(0, 0, 0, 0); }
 	virtual void set_system_theme_change_callback(const Callable &p_callable) {}
+	virtual void set_hardware_keyboard_connection_change_callback(const Callable &p_callable) {}
 
 private:
 	static bool window_early_clear_override_enabled;