From 76a4831cd3a56282b649705fc25d77d076ed2b4b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Pedro=20J=2E=20Est=C3=A9banez?= <pedrojrulez@gmail.com>
Date: Tue, 25 May 2021 17:37:24 +0200
Subject: [PATCH] Allow basic user data backup on Android

---
 platform/android/export/export.cpp           | 8 ++++++++
 platform/android/export/gradle_export_util.h | 3 ++-
 2 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/platform/android/export/export.cpp b/platform/android/export/export.cpp
index 070ead20024..6d8808fbc05 100644
--- a/platform/android/export/export.cpp
+++ b/platform/android/export/export.cpp
@@ -867,6 +867,8 @@ class EditorExportPlatformAndroid : public EditorExportPlatform {
 		int xr_mode_index = p_preset->get("xr_features/xr_mode");
 		bool focus_awareness = p_preset->get("xr_features/focus_awareness");
 
+		bool backup_allowed = p_preset->get("user_data_backup/allow");
+
 		Vector<String> perms;
 		// Write permissions into the perms variable.
 		_get_permissions(p_preset, p_give_internet, perms);
@@ -965,6 +967,10 @@ class EditorExportPlatformAndroid : public EditorExportPlatform {
 							encode_uint32(has_storage_permission ? 0xFFFFFFFF : 0, &p_manifest.write[iofs + 16]);
 						}
 
+						if (tname == "application" && attrname == "allowBackup") {
+							encode_uint32(backup_allowed, &p_manifest.write[iofs + 16]);
+						}
+
 						if (tname == "instrumentation" && attrname == "targetPackage") {
 							string_table.write[attr_value] = get_package_name(package_name);
 						}
@@ -1738,6 +1744,8 @@ public:
 		r_options->push_back(ExportOption(PropertyInfo(Variant::BOOL, "screen/support_large"), true));
 		r_options->push_back(ExportOption(PropertyInfo(Variant::BOOL, "screen/support_xlarge"), true));
 
+		r_options->push_back(ExportOption(PropertyInfo(Variant::BOOL, "user_data_backup/allow"), false));
+
 		r_options->push_back(ExportOption(PropertyInfo(Variant::STRING, "command_line/extra_args"), ""));
 
 		r_options->push_back(ExportOption(PropertyInfo(Variant::BOOL, "apk_expansion/enable"), false));
diff --git a/platform/android/export/gradle_export_util.h b/platform/android/export/gradle_export_util.h
index 82c3ac7a9f6..727d2369112 100644
--- a/platform/android/export/gradle_export_util.h
+++ b/platform/android/export/gradle_export_util.h
@@ -292,11 +292,12 @@ String _get_application_tag(const Ref<EditorExportPreset> &p_preset, bool p_has_
 	bool uses_xr = (int)(p_preset->get("xr_features/xr_mode")) == 1;
 	String manifest_application_text = vformat(
 			"    <application android:label=\"@string/godot_project_name_string\"\n"
-			"        android:allowBackup=\"false\" tools:ignore=\"GoogleAppIndexingWarning\"\n"
+			"        android:allowBackup=\"%s\" tools:ignore=\"GoogleAppIndexingWarning\"\n"
 			"        tools:replace=\"android:requestLegacyExternalStorage\" "
 			"        android:requestLegacyExternalStorage=\"%s\"\n"
 			"        android:icon=\"@mipmap/icon\">\n\n"
 			"        <meta-data tools:node=\"remove\" android:name=\"xr_mode_metadata_name\" />\n",
+			bool_to_string(p_preset->get("user_data_backup/allow")),
 			bool_to_string(p_has_storage_permission));
 
 	if (uses_xr) {