From 17279cdf45b6000134821e374bb76afd1d9e0f9d Mon Sep 17 00:00:00 2001
From: Fredia Huya-Kouadio <fhuyakou@gmail.com>
Date: Mon, 13 Jan 2025 08:52:17 -0800
Subject: [PATCH] Use implicit launch when running a Godot Android project from
 the editor

This allows developers to override the default launching activity (`com.godot.game.GodotApp`) with a custom one if desired.
Logic is added to fallback to the default launching activity if the implicit launch fails.
---
 platform/android/export/export_plugin.cpp     | 41 ++++++++++++++++---
 .../android/export/gradle_export_util.cpp     |  2 +-
 2 files changed, 37 insertions(+), 6 deletions(-)

diff --git a/platform/android/export/export_plugin.cpp b/platform/android/export/export_plugin.cpp
index 898d7bbe1642..232d7cf278f7 100644
--- a/platform/android/export/export_plugin.cpp
+++ b/platform/android/export/export_plugin.cpp
@@ -1917,6 +1917,21 @@ String EditorExportPlatformAndroid::get_export_option_warning(const EditorExport
 					}
 				}
 			}
+		} else if (p_name == "package/show_in_android_tv") {
+			bool gradle_build_enabled = p_preset->get("gradle_build/use_gradle_build");
+			if (bool(p_preset->get("package/show_in_android_tv")) && !gradle_build_enabled) {
+				return TTR("\"Use Gradle Build\" must be enabled to enable \"Show In Android Tv\".");
+			}
+		} else if (p_name == "package/show_as_launcher_app") {
+			bool gradle_build_enabled = p_preset->get("gradle_build/use_gradle_build");
+			if (bool(p_preset->get("package/show_as_launcher_app")) && !gradle_build_enabled) {
+				return TTR("\"Use Gradle Build\" must be enabled to enable \"Show As Launcher App\".");
+			}
+		} else if (p_name == "package/show_in_app_library") {
+			bool gradle_build_enabled = p_preset->get("gradle_build/use_gradle_build");
+			if (!bool(p_preset->get("package/show_in_app_library")) && !gradle_build_enabled) {
+				return TTR("\"Use Gradle Build\" must be enabled to disable \"Show In App Library\".");
+			}
 		}
 	}
 	return String();
@@ -2283,15 +2298,31 @@ Error EditorExportPlatformAndroid::run(const Ref<EditorExportPreset> &p_preset,
 	}
 	args.push_back("-a");
 	args.push_back("android.intent.action.MAIN");
-	args.push_back("-n");
-	args.push_back(get_package_name(package_name) + "/com.godot.game.GodotApp");
+
+	// Going with implicit launch first based on the LAUNCHER category and the app's package.
+	args.push_back("-c");
+	args.push_back("android.intent.category.LAUNCHER");
+	args.push_back(get_package_name(package_name));
 
 	output.clear();
 	err = OS::get_singleton()->execute(adb, args, &output, &rv, true);
 	print_verbose(output);
-	if (err || rv != 0) {
-		add_message(EXPORT_MESSAGE_ERROR, TTR("Run"), TTR("Could not execute on device."));
-		CLEANUP_AND_RETURN(ERR_CANT_CREATE);
+	if (err || rv != 0 || output.contains("Error: Activity not started")) {
+		// The implicit launch failed, let's try an explicit launch by specifying the component name before giving up.
+		const String component_name = get_package_name(package_name) + "/com.godot.game.GodotApp";
+		print_line("Implicit launch failed.. Trying explicit launch using", component_name);
+		args.erase(get_package_name(package_name));
+		args.push_back("-n");
+		args.push_back(component_name);
+
+		output.clear();
+		err = OS::get_singleton()->execute(adb, args, &output, &rv, true);
+		print_verbose(output);
+
+		if (err || rv != 0 || output.begins_with("Error: Activity not started")) {
+			add_message(EXPORT_MESSAGE_ERROR, TTR("Run"), TTR("Could not execute on device."));
+			CLEANUP_AND_RETURN(ERR_CANT_CREATE);
+		}
 	}
 
 	CLEANUP_AND_RETURN(OK);
diff --git a/platform/android/export/gradle_export_util.cpp b/platform/android/export/gradle_export_util.cpp
index 1fdbe1a32fd4..54d0e0916b9c 100644
--- a/platform/android/export/gradle_export_util.cpp
+++ b/platform/android/export/gradle_export_util.cpp
@@ -260,7 +260,7 @@ String _get_screen_sizes_tag(const Ref<EditorExportPreset> &p_preset) {
 String _get_activity_tag(const Ref<EditorExportPlatform> &p_export_platform, const Ref<EditorExportPreset> &p_preset, bool p_debug) {
 	String orientation = _get_android_orientation_label(DisplayServer::ScreenOrientation(int(GLOBAL_GET("display/window/handheld/orientation"))));
 	String manifest_activity_text = vformat(
-			"        <activity android:name=\"com.godot.game.GodotApp\" "
+			"        <activity android:name=\".GodotApp\" "
 			"tools:replace=\"android:screenOrientation,android:excludeFromRecents,android:resizeableActivity\" "
 			"tools:node=\"mergeOnlyAttributes\" "
 			"android:excludeFromRecents=\"%s\" "