Making FFI compatible with android

Makefile

@@ -6,6 +6,9 @@ run: build-go flutter-config-devices
 build: build-go flutter-config-devices
 	flutter build -d ${FLUTTER_DEVICE}
 
+clean:
+	flutter clean
+
 flutter-config-devices:
 	flutter config --enable-linux-desktop
 

lib/create_message.dart

@@ -1,17 +1,41 @@
 import 'dart:ffi' as ffi; // For FFI
+import 'dart:io';
+
 import 'package:ffi/ffi.dart';
+import 'package:flutter/services.dart';
+import 'package:path_provider/path_provider.dart';
+import 'package:flutter/widgets.dart' show WidgetsFlutterBinding;
 
 typedef CreateMessageFunctionTemplate = ffi.Pointer Function(
     ffi.Pointer<Utf8> message);
 
 typedef CreateMessage = CreateMessageFunctionTemplate;
 
-final dylib = ffi.DynamicLibrary.open('./vendor/out/text.a');
+// Future<String> vendorFuture =
+//     copyAssetToLocal().then((value) => vendorPath = value);
+
+// final dylib = ffi.DynamicLibrary.open('vendor/out/text.a');
 
-final CreateMessage _createMessage = dylib
-    .lookup<ffi.NativeFunction<CreateMessageFunctionTemplate>>('CreateMessage')
-    .asFunction();
+void createMessage(String text) async {
+  String path = await copyAssetToLocal();
+  final dylib = ffi.DynamicLibrary.open(path);
 
-void createMessage(String text) {
+  final CreateMessage _createMessage = dylib
+      .lookup<ffi.NativeFunction<CreateMessageFunctionTemplate>>(
+          'CreateMessage')
+      .asFunction();
+  print("log :: writing using $path");
   _createMessage(text.toNativeUtf8());
 }
+
+Future<String> copyAssetToLocal() async {
+  try {
+    var content = await rootBundle.load("vendor/out/text.a");
+    final directory = await getApplicationDocumentsDirectory();
+    var file = File("${directory.path}/text.a");
+    file.writeAsBytesSync(content.buffer.asUint8List());
+    return file.path;
+  } catch (e) {
+    rethrow;
+  }
+}

pubspec.lock

@@ -7,7 +7,7 @@ packages:
       name: async
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.8.2"
+    version: "2.9.0"
   boolean_selector:
     dependency: transitive
     description:
@@ -21,21 +21,14 @@ packages:
       name: characters
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.2.0"
-  charcode:
-    dependency: transitive
-    description:
-      name: charcode
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "1.3.1"
+    version: "1.2.1"
   clock:
     dependency: transitive
     description:
       name: clock
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.1.0"
+    version: "1.1.1"
   collection:
     dependency: transitive
     description:
@@ -56,14 +49,21 @@ packages:
       name: fake_async
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.3.0"
+    version: "1.3.1"
   ffi:
     dependency: "direct main"
     description:
       name: ffi
       url: "https://pub.dartlang.org"
     source: hosted
     version: "1.1.2"
+  file:
+    dependency: transitive
+    description:
+      name: file
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "6.1.4"
   flutter:
     dependency: "direct main"
     description: flutter
@@ -94,28 +94,98 @@ packages:
       name: matcher
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.12.11"
+    version: "0.12.12"
   material_color_utilities:
     dependency: transitive
     description:
       name: material_color_utilities
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.1.4"
+    version: "0.1.5"
   meta:
     dependency: transitive
     description:
       name: meta
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.7.0"
+    version: "1.8.0"
   path:
     dependency: transitive
     description:
       name: path
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.8.1"
+    version: "1.8.2"
+  path_provider:
+    dependency: "direct dev"
+    description:
+      name: path_provider
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.0.11"
+  path_provider_android:
+    dependency: transitive
+    description:
+      name: path_provider_android
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.0.20"
+  path_provider_ios:
+    dependency: transitive
+    description:
+      name: path_provider_ios
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.0.11"
+  path_provider_linux:
+    dependency: transitive
+    description:
+      name: path_provider_linux
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.1.7"
+  path_provider_macos:
+    dependency: transitive
+    description:
+      name: path_provider_macos
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.0.6"
+  path_provider_platform_interface:
+    dependency: transitive
+    description:
+      name: path_provider_platform_interface
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.0.5"
+  path_provider_windows:
+    dependency: transitive
+    description:
+      name: path_provider_windows
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.0.7"
+  platform:
+    dependency: transitive
+    description:
+      name: platform
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "3.1.0"
+  plugin_platform_interface:
+    dependency: transitive
+    description:
+      name: plugin_platform_interface
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.1.3"
+  process:
+    dependency: transitive
+    description:
+      name: process
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "4.2.4"
   sky_engine:
     dependency: transitive
     description: flutter
@@ -127,7 +197,7 @@ packages:
       name: source_span
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.8.2"
+    version: "1.9.0"
   stack_trace:
     dependency: transitive
     description:
@@ -148,27 +218,42 @@ packages:
       name: string_scanner
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.1.0"
+    version: "1.1.1"
   term_glyph:
     dependency: transitive
     description:
       name: term_glyph
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.2.0"
+    version: "1.2.1"
   test_api:
     dependency: transitive
     description:
       name: test_api
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.4.9"
+    version: "0.4.12"
   vector_math:
     dependency: transitive
     description:
       name: vector_math
       url: "https://pub.dartlang.org"
     source: hosted
     version: "2.1.2"
+  win32:
+    dependency: transitive
+    description:
+      name: win32
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.6.1"
+  xdg_directories:
+    dependency: transitive
+    description:
+      name: xdg_directories
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "0.2.0+2"
 sdks:
-  dart: ">=2.17.0-0 <3.0.0"
+  dart: ">=2.17.0 <3.0.0"
+  flutter: ">=2.10.0"

pubspec.yaml

@@ -46,13 +46,23 @@ dev_dependencies:
   # package. See that file for information about deactivating specific lint
   # rules and activating additional ones.
   flutter_lints: ^1.0.0
+  path_provider: ^2.0.11
 
 # For information on the generic Dart part of this file, see the
 # following page: https://dart.dev/tools/pub/pubspec
 
 # The following section is specific to Flutter.
 flutter:
 
+  plugin:
+    platforms:
+      android:
+        package: io.swhh.plugin1
+        pluginClass: Plugin1Plugin
+      ios:
+        pluginClass: Plugin1Plugin
+
+
   # The following line ensures that the Material Icons font is
   # included with your application, so that you can use the icons in
   # the material Icons class.