Creating AssetsCache class

doc/examples/aseprite/lib/main.dart

@@ -16,7 +16,7 @@ class MyGame extends BaseGame {
 
     final animation = await FlameAnimation.Animation.fromAsepriteData(
       "chopper.png",
-      "./assets/chopper.json"
+      "chopper.json"
     );
     final animationComponent = AnimationComponent(200, 200, animation);
 

lib/animation.dart

@@ -1,6 +1,6 @@
 import 'dart:convert';
-import 'package:flutter/services.dart' show rootBundle;
 
+import 'flame.dart';
 import 'sprite.dart';
 
 /// Represents a single animation frame.
@@ -110,7 +110,7 @@ class Animation {
   /// [imagePath]: Source of the spritesheet animation
   /// [dataPath]: Animation's exported data in json format
   static Future<Animation> fromAsepriteData(String imagePath, String dataPath) async {
-    String content = await rootBundle.loadString(dataPath);
+    String content = await Flame.assets.readFile(dataPath);
     Map<String, dynamic> json = jsonDecode(content);
 
     Map<String, dynamic> jsonFrames = json["frames"];

lib/assets_cache.dart

@@ -0,0 +1,25 @@
+import 'package:flutter/services.dart' show rootBundle;
+
+class AssetsCache {
+  Map<String, String> textFiles = {};
+
+  void clear(String file) {
+    textFiles.remove(file);
+  }
+
+  void clearCache() {
+    textFiles.clear();
+  }
+
+  Future<String> readFile(String fileName) async {
+    if (!textFiles.containsKey(fileName)) {
+      textFiles[fileName] = await _readFile(fileName);
+    }
+
+    return textFiles[fileName];
+  }
+
+  Future<String> _readFile(String fileName) async {
+    return await rootBundle.loadString("assets/" + fileName);
+  }
+}

lib/flame.dart

@@ -7,6 +7,7 @@ import 'package:flutter/services.dart';
 import 'package:flutter/widgets.dart';
 
 import 'images.dart';
+import 'assets_cache.dart';
 import 'util.dart';
 
 /// This class holds static references to some useful objects to use in your game.
@@ -27,6 +28,9 @@ class Flame {
   /// Access a shared instance of the [Util] class.
   static Util util = new Util();
 
+  /// Access a shard instance of [AssetsCache] class.
+  static AssetsCache assets = new AssetsCache();
+
   static Future<void> init(
       {AssetBundle bundle,
       bool fullScreen = true,