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扩展App Inventor：具有多点触控和手势检测功能 · App Inventor 2 中文网
...omponent is an item that the app can use. It could be visible on the phone screen such as a button or label, or it could be non-visible, such as a camera or a sensor. Each component has a set of blocks that the programmer can use to control its behavior.
Figure 1. Blocks for an App Inventor app t...
Understanding Canvas and Surface concepts
...:
A Surface is an object holding pixels that are being composited to the screen. Every window you see on the screen (a dialog, your full-screen activity, the status bar) has its own surface that it draws in to, and Surface Flinger renders these to the final display in their correct Z-order. A su...
扩展App Inventor：具有多点触控和手势检测功能 · App Inventor 2 中文网
...omponent is an item that the app can use. It could be visible on the phone screen such as a button or label, or it could be non-visible, such as a camera or a sensor. Each component has a set of blocks that the programmer can use to control its behavior.
Figure 1. Blocks for an App Inventor app t...
MaterialDialog 对话框增强扩展 · App Inventor 2 中文网
...。
效果预览：
代码示例：
when Screen1.Initialize() {
MaterialDialog1.CreateDialogFromView("myDialog", 垂直布局1, true, 1, 10)
}
CreateTitleDialog 创建标题对话框(dialogId,title,message,positiveButtonText,negativeButtonText,neutralButtonTe...
Run ssh and immediately execute command [duplicate]
...milar should be possible with shells other than bash):
if [ -f $HOME/.add-screen-to-history ] ; then
history -s 'screen -dr'
fi
I keep a screen session running on one particular machine, and I've had problems with ssh connections to that machine being dropped, requiring me to re-run screen -d...
getting the screen density programmatically in android?
How to get the screen density programmatically in android?
19 Answers
19
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How do I get monitor resolution in Python?
..."Height =", GetSystemMetrics(1))
If you are working with high resolution screen, make sure your python interpreter is HIGHDPIAWARE.
Based on this post.
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App Inventor 2 文件查找与文件管理教程 · App Inventor 2 中文网
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简单方案：预设文件列表
when Screen1.Initialize() {
// 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) ...
Restoring state of TextView after screen rotation?
In my app I have TextView and EditText . Both have data in it. When the screen orientation changes the data in the EditText remains, but TextView data is cleared.
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How to make vi redraw screen?
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To force a screen refresh
:redraw!
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