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Android add placeholder text to EditText
...TextView
((TextView) findViewById(R.id.email)).setText("your Text")
In Kotlin:
// Cast your EditText into a TextView
// Like this
(findViewById(R.id.email) as TextView).text = "Your Text"
// Or simply like this
findViewById<TextView>(R.id.email).text = "Your Text"
...
Add & delete view from Layout
...
// Remove TextView from LinearLayout
linearLayout.removeView(textView);
kotlin:
// Root Layout
val linearLayout = LinearLayout(context)
linearLayout.gravity = Gravity.CENTER
linearLayout.orientation = LinearLayout.VERTICAL
// TextView
val textView = TextView(context)
textView.text = "Sample"
/...
How to set delay in android?
...
Handler answer in Kotlin :
1 - Create a top-level function inside a file (for example a file that contains all your top-level functions) :
fun delayFunction(function: ()-> Unit, delay: Long) {
Handler().postDelayed(function, delay)
}
...
【AI2+AI】人工智能舞姿识别App - 创客硬件开发 - 清泛IT社区，为创新赋能！
...外观和感觉。但不要重命名组件，因为本教程会使用操作指南中给出的名称。SwapCameraButton按钮可以根据用户的意愿切换前置或后置摄像头。CanvasLiveButton将画布背景从纯黑色切换到实时摄像机视图。ResetButton设置Dance Score得分为零...
OnCreateOptionsMenu() not called in Fragment
.... Thank you for sharing this! I had this exact problem because I'm using Kotlin and many times you don't have to do findViewById, etc... to get the view you need.
– DWndrer
Sep 16 '18 at 2:54
...
Supabase 拓展：App 接入 Supabase 后端服务（Auth + PostgreSQL + Storage...
... 教育 中文教育版 各版本对比 App上架指南 入门必读 IoT专题 AI2拓展 Aia Store 关于 关于我们 发布日志 服务条款 ...
做了个购物清单App后，我才真正搞懂App Inventor 2的变量 - App应用开发 - ...
...的积木能做出真正好用的App"。
复盘感悟
变量是编程的地基。App Inventor 2把变量简化为5种积木块——初始化全局、初始化局部(do)、初始化局部(return)、取值、设置值——看起来简单，但每个都有其使用场景：
- 全局变...
DaffyMenu 扩展：弹出菜单扩展，为组件添加弹出式菜单功能 · App Inventor 2 中文网
... 教育 中文教育版 各版本对比 App上架指南 入门必读 IoT专题 AI2拓展 Aia Store 关于 关于我们 发布日志 服务条款 ...
Excel RTD(Excel Real-Time Data)实时刷新数据技术 - C/C++ - 清泛网 - 专注C/C++及内核技术
..."
第一个变量 ProgID 表示Real-Time Data 服务器（RTD Server）的编程标识符 (ProgID)。Server 变量指示运行RTD Server的计算机的名称；如果RTD Server在本地运行，则可以将此变量设置为空字符串或将其忽略。其他变量只表示发送到RTD Server的...
Android dismiss keyboard
...
Here's a Kotlin solution (mixing the various answers in thread)
Create an extension function (perhaps in a common ViewHelpers class)
fun Activity.dismissKeyboard() {
val inputMethodManager = getSystemService( Context.INPUT_METHO...