Flutter跨插件访问assets资源

1.现在常常以插件话和组件化开发移动端，我们在使用原生访问flutter的Assets资源时常常可以这样写

val flutterAssetStream = assetManager.open("flutter_assets/assets/my_flutter_asset.png")

但是如果是跨插件的话可能就不行了，比如一个主项目可能引入了好几个问呢-----》使用 AssetFileDescriptor

    
//assetPath的路径如：assets/my_flutter_asset.png?package=app

private fun assetSourceToBitmap(context: Context, assetPath: String,flutterAssets: FlutterPlugin.FlutterAssets): Bitmap? {
        var source: BufferedSource? = null
            try {
                val uri = Uri.parse(assetPath)
                val packageName = uri.getQueryParameter("package")
                val subPath = if (packageName.isNullOrBlank()) {
                    flutterAssets.getAssetFilePathBySubpath(uri.path.orEmpty())
                } else {
                    flutterAssets.getAssetFilePathBySubpath(uri.path.orEmpty(), packageName)
                }
                val internalSource = context.assets.openFd(subPath)
                source = internalSource.createInputStream().source().buffer()
                val array = source.readByteArray()
                return BitmapFactory.decodeByteArray(array,0,array.size)
            } catch (e: Exception) {
                println("logo-IOException")
                e.printStackTrace()
                byteArrayOf()
            }  finally {
                source?.close()
            }
        return null
    }

override fun onAttachedToEngine(flutterPluginBinding: FlutterPlugin.FlutterPluginBinding) {

　　flutterAssets= flutterPluginBinding.flutterAssets 
}

 附：参考 https://pub.dev/packages/fluwx  的分享图片功能