File Path(dart:io & service)

https://github.com/kyorohiro/hello_skyengine/tree/master/dartio_service_path

// following code is checked in 2016/01/13
// flutter: ">=0.0.15"
import 'package:flutter/widgets.dart';
import 'package:flutter/services.dart';
import 'dart:io';
import 'dart:convert';
import 'dart:async';
main() async {
PathServiceProxy pathServiceProxy = new PathServiceProxy.unbound();
shell.requestService("dummy", pathServiceProxy);
StringBuffer buffer = new StringBuffer();
buffer.write("Directory.current = ${Directory.current} \n");
buffer.write("Directory.systemTemp = ${Directory.systemTemp} \n");
buffer.write("Directory.systemTemp = ${new Directory("./").absolute} \n");
buffer.write("PathService.getAppDataDir = ${await pathServiceProxy.ptr.getAppDataDir()} \n");
buffer.write("PathService.getCacheDir = ${await pathServiceProxy.ptr.getCacheDir()} \n");
buffer.write("PathService.getFileDir = ${await pathServiceProxy.ptr.getFilesDir()} \n");
pathServiceProxy.close();
Text t = new Text("${buffer.toString()}");
Center c = new Center(child: t);
runApp(c);
}