Fix 'save & restart' logic for the Android Editor

platform/android/java/editor/src/main/java/org/godotengine/editor/GodotEditor.kt

@@ -37,10 +37,12 @@ import android.os.Build
 import android.os.Bundle
 import android.os.Debug
 import android.os.Environment
+import android.util.Log
 import android.widget.Toast
 import androidx.window.layout.WindowMetricsCalculator
 import org.godotengine.godot.FullScreenGodotApp
 import org.godotengine.godot.utils.PermissionsUtil
+import org.godotengine.godot.utils.ProcessPhoenix
 import java.util.*
 import kotlin.math.min
 
@@ -56,12 +58,17 @@ import kotlin.math.min
 open class GodotEditor : FullScreenGodotApp() {
 
 	companion object {
+		private val TAG = GodotEditor::class.java.simpleName
+
 		private const val WAIT_FOR_DEBUGGER = false
 
 		private const val COMMAND_LINE_PARAMS = "command_line_params"
 
 		private const val EDITOR_ARG = "--editor"
+		private const val EDITOR_ARG_SHORT = "-e"
+
 		private const val PROJECT_MANAGER_ARG = "--project-manager"
+		private const val PROJECT_MANAGER_ARG_SHORT = "-p"
 	}
 
 	private val commandLineParams = ArrayList<String>()
@@ -105,13 +112,13 @@ open class GodotEditor : FullScreenGodotApp() {
 			Build.VERSION.SDK_INT >= Build.VERSION_CODES.N && (isInMultiWindowMode || isLargeScreen)
 
 		for (arg in args) {
-			if (EDITOR_ARG == arg) {
+			if (EDITOR_ARG == arg || EDITOR_ARG_SHORT == arg) {
 				targetClass = GodotEditor::class.java
 				launchAdjacent = false
 				break
 			}
 
-			if (PROJECT_MANAGER_ARG == arg) {
+			if (PROJECT_MANAGER_ARG == arg || PROJECT_MANAGER_ARG_SHORT == arg) {
 				targetClass = GodotProjectManager::class.java
 				launchAdjacent = false
 				break
@@ -125,7 +132,13 @@ open class GodotEditor : FullScreenGodotApp() {
 		if (launchAdjacent) {
 			newInstance.addFlags(Intent.FLAG_ACTIVITY_LAUNCH_ADJACENT)
 		}
-		startActivity(newInstance)
+		if (targetClass == javaClass) {
+			Log.d(TAG, "Restarting $targetClass")
+			ProcessPhoenix.triggerRebirth(this, newInstance)
+		} else {
+			Log.d(TAG, "Starting $targetClass")
+			startActivity(newInstance)
+		}
 	}
 
 	// Get the screen's density scale

platform/android/java_godot_lib_jni.cpp

@@ -71,6 +71,39 @@ static Vector3 gravity;
 static Vector3 magnetometer;
 static Vector3 gyroscope;
 
+static void _terminate(JNIEnv *env, bool p_restart = false) {
+	step.set(-1); // Ensure no further steps are attempted and no further events are sent
+
+	// lets cleanup
+	if (java_class_wrapper) {
+		memdelete(java_class_wrapper);
+	}
+	if (input_handler) {
+		delete input_handler;
+	}
+	// Whether restarting is handled by 'Main::cleanup()'
+	bool restart_on_cleanup = false;
+	if (os_android) {
+		restart_on_cleanup = os_android->is_restart_on_exit_set();
+		os_android->main_loop_end();
+		Main::cleanup();
+		delete os_android;
+	}
+	if (godot_io_java) {
+		delete godot_io_java;
+	}
+	if (godot_java) {
+		if (!restart_on_cleanup) {
+			if (p_restart) {
+				godot_java->restart(env);
+			} else {
+				godot_java->force_quit(env);
+			}
+		}
+		delete godot_java;
+	}
+}
+
 extern "C" {
 
 JNIEXPORT void JNICALL Java_org_godotengine_godot_GodotLib_setVirtualKeyboardHeight(JNIEnv *env, jclass clazz, jint p_height) {
@@ -104,23 +137,7 @@ JNIEXPORT jboolean JNICALL Java_org_godotengine_godot_GodotLib_initialize(JNIEnv
 }
 
 JNIEXPORT void JNICALL Java_org_godotengine_godot_GodotLib_ondestroy(JNIEnv *env, jclass clazz) {
-	// lets cleanup
-	if (java_class_wrapper) {
-		memdelete(java_class_wrapper);
-	}
-	if (godot_io_java) {
-		delete godot_io_java;
-	}
-	if (godot_java) {
-		delete godot_java;
-	}
-	if (input_handler) {
-		delete input_handler;
-	}
-	if (os_android) {
-		os_android->main_loop_end();
-		delete os_android;
-	}
+	_terminate(env, false);
 }
 
 JNIEXPORT jboolean JNICALL Java_org_godotengine_godot_GodotLib_setup(JNIEnv *env, jclass clazz, jobjectArray p_cmdline) {
@@ -196,9 +213,7 @@ JNIEXPORT void JNICALL Java_org_godotengine_godot_GodotLib_newcontext(JNIEnv *en
 			}
 		} else {
 			// Rendering context recreated because it was lost; restart app to let it reload everything
-			step.set(-1); // Ensure no further steps are attempted and no further events are sent
-			os_android->main_loop_end();
-			godot_java->restart(env);
+			_terminate(env, true);
 		}
 	}
 }
@@ -249,7 +264,7 @@ JNIEXPORT jboolean JNICALL Java_org_godotengine_godot_GodotLib_step(JNIEnv *env,
 
 	bool should_swap_buffers = false;
 	if (os_android->main_loop_iterate(&should_swap_buffers)) {
-		godot_java->force_quit(env);
+		_terminate(env, false);
 	}
 
 	return should_swap_buffers;