Android port of the Godot Editor

These set of changes focus primarily on getting the core logic and overall Godot Editor UI and functionality up and running natively on Android devices.
UI tweaks / cleanup / polish, as well configuration for Android specific functionality / restrictions will be addressed in follow-up PRs iteratively based on feedback.

Co-authored-by: thebestnom <shoval.arad@gmail.com>

editor/editor_node.cpp

@@ -635,6 +635,9 @@ void EditorNode::_notification(int p_what) {
 			get_tree()->get_root()->set_snap_2d_transforms_to_pixel(false);
 			get_tree()->get_root()->set_snap_2d_vertices_to_pixel(false);
 			get_tree()->set_auto_accept_quit(false);
+#ifdef ANDROID_ENABLED
+			get_tree()->set_quit_on_go_back(false);
+#endif
 			get_tree()->get_root()->connect("files_dropped", callable_mp(this, &EditorNode::_dropped_files));
 
 			command_palette->register_shortcuts_as_command();

main/main.cpp

@@ -2276,9 +2276,10 @@ bool Main::start() {
 
 		bool embed_subwindows = GLOBAL_DEF("display/window/subwindows/embed_subwindows", true);
 
-		if (OS::get_singleton()->is_single_window() || (!project_manager && !editor && embed_subwindows)) {
+		if (OS::get_singleton()->is_single_window() || (!project_manager && !editor && embed_subwindows) || !DisplayServer::get_singleton()->has_feature(DisplayServer::Feature::FEATURE_SUBWINDOWS)) {
 			sml->get_root()->set_embedding_subwindows(true);
 		}
+
 		ResourceLoader::add_custom_loaders();
 		ResourceSaver::add_custom_savers();
 

platform/android/SCsub

@@ -53,10 +53,17 @@ else:
 if lib_arch_dir != "":
     if env["target"] == "release":
         lib_type_dir = "release"
-    else:  # release_debug, debug
+    elif env["target"] == "release_debug":
         lib_type_dir = "debug"
+    else:  # debug
+        lib_type_dir = "dev"
 
-    out_dir = "#platform/android/java/lib/libs/" + lib_type_dir + "/" + lib_arch_dir
+    if env["tools"]:
+        lib_tools_dir = "tools/"
+    else:
+        lib_tools_dir = ""
+
+    out_dir = "#platform/android/java/lib/libs/" + lib_tools_dir + lib_type_dir + "/" + lib_arch_dir
     env_android.Command(
         out_dir + "/libgodot_android.so", "#bin/libgodot" + env["SHLIBSUFFIX"], Move("$TARGET", "$SOURCE")
     )

platform/android/java/app/build.gradle

@@ -33,6 +33,11 @@ allprojects {
     }
 }
 
+configurations {
+    // Initializes a placeholder for the devImplementation dependency configuration.
+    devImplementation {}
+}
+
 dependencies {
     implementation libraries.kotlinStdLib
     implementation libraries.androidxFragment
@@ -45,6 +50,7 @@ dependencies {
         // Custom build mode. In this scenario this project is the only one around and the Godot
         // library is available through the pre-generated godot-lib.*.aar android archive files.
         debugImplementation fileTree(dir: 'libs/debug', include: ['*.jar', '*.aar'])
+        devImplementation fileTree(dir: 'libs/dev', include: ['*.jar', '*.aar'])
         releaseImplementation fileTree(dir: 'libs/release', include: ['*.jar', '*.aar'])
     }
 
@@ -66,6 +72,7 @@ dependencies {
 android {
     compileSdkVersion versions.compileSdk
     buildToolsVersion versions.buildTools
+    ndkVersion versions.ndkVersion
 
     compileOptions {
         sourceCompatibility versions.javaVersion
@@ -93,6 +100,8 @@ android {
         versionName getExportVersionName()
         minSdkVersion getExportMinSdkVersion()
         targetSdkVersion getExportTargetSdkVersion()
+
+        missingDimensionStrategy 'products', 'template'
     }
 
     lintOptions {
@@ -146,6 +155,18 @@ android {
             }
         }
 
+        dev {
+            initWith debug
+            // Signing and zip-aligning are skipped for prebuilt builds, but
+            // performed for custom builds.
+            zipAlignEnabled shouldZipAlign()
+            if (shouldSign()) {
+                signingConfig signingConfigs.debug
+            } else {
+                signingConfig null
+            }
+        }
+
         release {
             // Signing and zip-aligning are skipped for prebuilt builds, but
             // performed for custom builds.
@@ -167,6 +188,7 @@ android {
             assets.srcDirs = ['assets']
         }
         debug.jniLibs.srcDirs = ['libs/debug', 'libs/debug/vulkan_validation_layers']
+        dev.jniLibs.srcDirs = ['libs/dev']
         release.jniLibs.srcDirs = ['libs/release']
     }
 
@@ -183,6 +205,12 @@ task copyAndRenameDebugApk(type: Copy) {
     rename "android_debug.apk", getExportFilename()
 }
 
+task copyAndRenameDevApk(type: Copy) {
+    from "$buildDir/outputs/apk/dev/android_dev.apk"
+    into getExportPath()
+    rename "android_dev.apk", getExportFilename()
+}
+
 task copyAndRenameReleaseApk(type: Copy) {
     from "$buildDir/outputs/apk/release/android_release.apk"
     into getExportPath()
@@ -195,6 +223,12 @@ task copyAndRenameDebugAab(type: Copy) {
     rename "build-debug.aab", getExportFilename()
 }
 
+task copyAndRenameDevAab(type: Copy) {
+    from "$buildDir/outputs/bundle/dev/build-dev.aab"
+    into getExportPath()
+    rename "build-dev.aab", getExportFilename()
+}
+
 task copyAndRenameReleaseAab(type: Copy) {
     from "$buildDir/outputs/bundle/release/build-release.aab"
     into getExportPath()

platform/android/java/app/config.gradle

@@ -76,7 +76,7 @@ ext.getGodotEditorVersion = { ->
     String editorVersion = project.hasProperty("godot_editor_version") ? project.property("godot_editor_version") : ""
     if (editorVersion == null || editorVersion.isEmpty()) {
         // Try the library version first
-        editorVersion = getGodotLibraryVersion()
+        editorVersion = getGodotLibraryVersionName()
 
         if (editorVersion.isEmpty()) {
             // Fallback value.
@@ -86,9 +86,24 @@ ext.getGodotEditorVersion = { ->
     return editorVersion
 }
 
+ext.getGodotLibraryVersionCode = { ->
+    String versionName = ""
+    int versionCode = 1
+    (versionName, versionCode) = getGodotLibraryVersion()
+    return versionCode
+}
+
+ext.getGodotLibraryVersionName = { ->
+    String versionName = ""
+    int versionCode = 1
+    (versionName, versionCode) = getGodotLibraryVersion()
+    return versionName
+}
+
 ext.generateGodotLibraryVersion = { List<String> requiredKeys ->
     // Attempt to read the version from the `version.py` file.
-    String libraryVersion = ""
+    String libraryVersionName = ""
+    int libraryVersionCode = 0
 
     File versionFile = new File("../../../version.py")
     if (versionFile.isFile()) {
@@ -109,15 +124,35 @@ ext.generateGodotLibraryVersion = { List<String> requiredKeys ->
         }
 
         if (requiredKeys.empty) {
-            libraryVersion = map.values().join(".")
+            libraryVersionName = map.values().join(".")
+            try {
+                if (map.containsKey("patch")) {
+                    libraryVersionCode = Integer.parseInt(map["patch"])
+                }
+
+                if (map.containsKey("minor")) {
+                    libraryVersionCode += (Integer.parseInt(map["minor"]) * 100)
+                }
+
+                if (map.containsKey("major")) {
+                    libraryVersionCode += (Integer.parseInt(map["major"]) * 10000)
+                }
+            } catch (NumberFormatException ignore) {
+                libraryVersionCode = 1
+            }
         }
     }
 
-    if (libraryVersion.isEmpty()) {
+    if (libraryVersionName.isEmpty()) {
         // Fallback value in case we're unable to read the file.
-        libraryVersion = "custom_build"
+        libraryVersionName = "custom_build"
+    }
+
+    if (libraryVersionCode == 0) {
+        libraryVersionCode = 1
     }
-    return libraryVersion
+
+    return [libraryVersionName, libraryVersionCode]
 }
 
 ext.getGodotLibraryVersion = { ->
@@ -127,7 +162,10 @@ ext.getGodotLibraryVersion = { ->
 
 ext.getGodotPublishVersion = { ->
     List<String> requiredKeys = ["major", "minor", "patch", "status"]
-    return generateGodotLibraryVersion(requiredKeys)
+    String versionName = ""
+    int versionCode = 1
+    (versionName, versionCode) = generateGodotLibraryVersion(requiredKeys)
+    return versionName
 }
 
 final String VALUE_SEPARATOR_REGEX = "\\|"