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App Inventor 2 低功耗蓝牙(BLE) 硬件接入、数据通信及IO控制 - App Invent...
...备被扫描后直接连接即可通信。蓝牙App开发示例demo参考界面如下：
扫描蓝牙设备，代码如下：
扫描完成后，设备列表展示到“列表显示框”组件中：
点击列表中的目标设备（一般硬件文档会有说明，名称会有特别的标识）...
数据存储组件 · App Inventor 2 中文网
...的默认作用域，不指定默认 私有。
读权限
仅用于“界面设计”视图的属性，用于启用App作用域之外的文件的读取权限。
作用域
表示 读取文件 和 保存文件 等操作的当前作用域。
写权限
仅用于“界面设计”视图的属...
Accessing UI (Main) Thread safely in WPF
... use
Dispatcher.Invoke(Delegate, object[])
on the Application's (or any UIElement's) dispatcher.
You can use it for example like this:
Application.Current.Dispatcher.Invoke(new Action(() => { /* Your code here */ }));
or
someControl.Dispatcher.Invoke(new Action(() => { /* Your code ...
Asynctask vs Thread in android
In UI, to perform some background work, I used a separate Thread . But as suggested by others, I am now using AsyncTask .
...
What's the difference between Invoke() and BeginInvoke()
...es asynchronously, on a threadpool thread.
Control.Invoke: Executes on the UI thread, but calling thread waits for completion before continuing.
Control.BeginInvoke: Executes on the UI thread, and calling thread doesn't wait for completion.
Tim's answer mentions when you might want to use BeginInv...
How to disable manual input for JQuery UI Datepicker field? [duplicate]
I decided to use the JQuery UI Datepicker script for picking dates. Below is part of my code, and the way I integrated it into my PHP page:
...
iOS UI系列 (一) ：Auto Layout 高度三等分 - 更多技术 - 清泛网 - 专注C/C++及内核技术
iOS UI系列 (一) ：Auto Layout 高度三等分首先我们创建一个Single View Application然后我们向StoryBoard的ViewController 添加3个UIView, 设置不同的背景色，我们的目的是让这...首先我们创建一个Single View Application
然后我们向StoryBoard的ViewContro...
iOS UI系列 (三) ：Reusable Button - 更多技术 - 清泛网 - 专注C/C++及内核技术
iOS UI系列 (三) ：Reusable Button有时候我们需要给一些做一些设置，但是这些控件却需要用在多个地方，如果在每一个ViewController都设置一遍，那么代码就不整洁了，而且比较...有时候我们需要给一些做一些设置，但是这些控件却需...
What to do about Eclipse's “No repository found containing: …” error messages?
...
Quick answer
Go to Help → Install new software → Here uncheck “Contact all update sites during install to find required software”
Eclipse will prompt that the content isn't authorized or something like that. just ig...
Jquery date picker z-index issue
...ative.
Using this way you don't have to modify any javascript from jQuery UI.
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