mCallback = callback;mAsynchronous = async;}在Handler的构造方法中，首先通过Looper.myLooper()方法获取当前线程的Looper对象，如果Looper对象为空，就抛出异常，说当前线程还没有调用Looper.prepare()方法。如果Looper不为空，Handler就会持有Looper的MessageQueue对象mQueue。我们再

),),],),Column(mainAxisSize: MainAxisSize.min,mainAxisAlignment: MainAxisAlignment.center,children: [Icon(Icons.share, color: Theme.of(context).primaryColor),Container(margin: const EdgeInsets.only(to

它最终返回一个0bservable对象，这个过程会组织网络请求、解析响应结果、将响应结果发送给订阅0bservable的0bserver这里我们需要拆成两步来看：loadServiceMethod()、invoke()分别做了什么。2、网络请求的准备阶段loadServiceMethod()完成的主要任务就是解析网络请求接口方法上的注解信息，得到数据适配器、数据解析器对象，最终封装一个CallAd

结果Creating project sub_flutter…sub_flutter/test/widget_test.dart (created)sub_flutter/sub_flutter.iml (created)sub_flutter/.gitignore (created)sub_flutter/.metadata (created)sub_flutter/pubspec.yaml (

创建user模块配置路由及配置代理在.umire.ts中import { defineConfig } from ‘umi’;export default defineConfig({nodeModulesTransform: {type: ‘none’,},routes: [{ path: ‘/’, component: ‘@/pages/users/index’ },],fastRefresh

mDraw = new ProcessImageAndDrawResults(this);mPreview = new Preview(this, mDraw);mDraw.mTracker = new HTracker();String templatePath = this.getApplicationInfo().dataDir + “/” + database;if (FSDK.FSDKE