add android integration & make iOS API consistent

add pubspec android plugin

update android CMakeLists

add filament android libs for linking

lib/view/filament_view.dart

@@ -17,32 +17,14 @@ class FilamentView extends FilamentViewPlatform {
   ) {
     switch (defaultTargetPlatform) {
       case TargetPlatform.android:
-        return PlatformViewLink(
-          viewType: FILAMENT_VIEW_ID,
-          surfaceFactory:
-              (BuildContext context, PlatformViewController controller) {
-            return AndroidViewSurface(
-              controller: controller as AndroidViewController,
-              gestureRecognizers: const <
-                  Factory<OneSequenceGestureRecognizer>>{},
-              hitTestBehavior: PlatformViewHitTestBehavior.opaque,
-            );
-          },
-          onCreatePlatformView: (PlatformViewCreationParams params) {
-            return PlatformViewsService.initSurfaceAndroidView(
-              id: params.id,
-              viewType: FILAMENT_VIEW_ID,
-              layoutDirection: TextDirection.ltr,
-              creationParams: {},
-              creationParamsCodec: StandardMessageCodec(),
-            )
-              ..addOnPlatformViewCreatedListener((int id) {
-                onFilamentViewCreated(id);
-                params.onPlatformViewCreated(id);
-              })
-              ..create();
-          },
-        );
+        return AndroidView(
+            viewType: FILAMENT_VIEW_ID,
+            gestureRecognizers: <Factory<OneSequenceGestureRecognizer>>{},
+            hitTestBehavior: PlatformViewHitTestBehavior.opaque,
+            onPlatformViewCreated: (id) {
+              print("onplatformview created $id");
+              onFilamentViewCreated(id);
+            });
       case TargetPlatform.iOS:
         return UiKitView(
           viewType: FILAMENT_VIEW_ID,
@@ -51,8 +33,7 @@ class FilamentView extends FilamentViewPlatform {
           },
         );
       case TargetPlatform.windows:
-        return Text(
-            "Flutter doesn't support platform view on Windows yet.");
+        return Text("Flutter doesn't support platform view on Windows yet.");
       default:
         return Text(
             '$defaultTargetPlatform is not yet implemented by Filament plugin.');

lib/view/filament_view_platform.dart

@@ -2,13 +2,13 @@ import 'package:flutter/widgets.dart';
 import 'package:polyvox_filament/view/filament_view.dart';
 import 'package:plugin_platform_interface/plugin_platform_interface.dart';
 
-typedef void FilamentViewCreatedCallback(int id);
+typedef FilamentViewCreatedCallback = void Function(int id);
 
 abstract class FilamentViewPlatform extends PlatformInterface {
   FilamentViewPlatform() : super(token: _token);
 
   static final Object _token = Object();
-  static FilamentViewPlatform _instance = FilamentView();
+  static final FilamentViewPlatform _instance = FilamentView();
 
   static FilamentViewPlatform get instance => _instance;
 

lib/view/filament_widget.dart

@@ -1,4 +1,8 @@
+import 'package:flutter/foundation.dart';
+import 'package:flutter/gestures.dart';
+import 'package:flutter/rendering.dart';
 import 'package:flutter/widgets.dart';
+import 'package:polyvox_filament/view/filament_view.dart';
 
 import '../filament_controller.dart';
 import 'filament_view_platform.dart';