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App Inventor 2 动态图表教程 - ECharts与Chart组件实现实时曲线图 · App Inventor 2 中文网

...etWebViewString(); if (msg && msg !== "") { try { var parsed = JSON.parse(msg); if (parsed.type === "add") { data.push(parsed.value); labels.push(parsed.label || ""); if (data.length > maxPoints) { data.shift(); labels.shift(); } ...
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App Inventor 2 ListView自定义Item教程 - 打造精美列表 · App Inventor 2 中文网

...r.getWebViewString(); if (data && data !== "") { try { items = JSON.parse(data); renderList(items); } catch(e) {} window.AppInventor.setWebViewString(""); } }, 200); App Inventor积木块 when Screen1.Initialize() { WebViewer1.HomeUrl = "fil...
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MLKitLanguageId 拓展:离线语言识别 · App Inventor 2 中文网

...本输入框_输入.Text) } when LangId1.GotPossibleLanguages(count, resultJson) { 标签1.Text = join("共 ", count, " 个候选") 标签_原始结果.Text = resultJson } resultJson 的形状(用「JSON 文本解码」块解析): [{"languageTag":"zh","name":"中文","confidence":0.99},...
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App Inventor 2 文件查找与文件管理教程 · App Inventor 2 中文网

... 手动维护可用文件列表 var 文件列表 = [ "data.txt", "config.json", "notes.md" ] 列表选择器_文件.Elements = 文件列表 } when 列表选择器_文件.AfterPicking(选中项) { 文件管理器1.ReadFrom(join("/sdcard/MyApp/", 选中项)) } 使用ActivityStarter...
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Android应用开发性能优化完全分析 - 更多技术 - 清泛网 - 专注C/C++及内核技术

...网络应用传输中使用高效率的数据格式和解析方法,譬如JSON等。 在传输用户反馈或者下载OTA升级包等不是十分紧急的操作时尽量采用压缩数据进行传输且延迟到设备充电和WIFI状态时进行。 在有必要的情况下尽量通过Powe...
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java.net.ConnectException: Connection refused

... I had the same problem with Mqtt broker called vernemq.but solved it by adding the following. $ sudo vmq-admin listener show to show the list o allowed ips and ports for vernemq $ sudo vmq-admin listener start port=1885 -a 0.0.0.0 --mountpoint /ap...
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MLKitCodeScanner 拓展:离线条码 / 二维码识别 · App Inventor 2 中文网

...when CodeScan1.GotBarcode(rawValue, format, valueType, displayValue, detailJson) { 标签1.Text = rawValue } when CodeScan1.NoBarcodeFound(operation) { 标签1.Text = "这张图里没有找到条码" } 二、摄像头实时扫描 设计器里放一个垂直布局(...
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What is ActiveMQ used for - can we apply messaging concept using a Database?

...eatures that are only in ActiveMQ, wire protocols like OpenWire, STOMP and MQTT, JMS, EIP together with Apache Camel, message patterns like "request/reply" and "publish/subscribe", JMS Bridging, clustering ("network of brokers"), which allow scaling and distributions, etc. You should read up on thos...
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App Inventor 2 中文网原创内容 · App Inventor 2 中文网

...视化】App Inventor 2 折线图/曲线图/实时数据绘图教程 【JSON解析】App Inventor 2 JSON数据解析教程 【文件上传】App Inventor 2 上传文件和图片到服务器教程 【进制转换】App Inventor 2 十六进制/二进制/补码运算教程 【云数据库】App...
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Nginx缓存解决方案:SRCache - 更多技术 - 清泛网 - 专注C/C++及内核技术

...che-Store-Status: BYPASS 目前我主要用srcache来缓存一些接口的json结果集,这些接口同时也支持jsonp,也就是客户端传递一个callback参数之类的,大家应该明白,此时如果不加区分的都缓存,那么有callback的和没有callback的调用结果就都...