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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...
moveCamera with CameraUpdateFactory.newLatLngBounds crashes
...ngeListener. All will be working perfectly and you don't need to calculate screen size. This event occurs after map size calculation (as I understand).
Example:
map.setOnCameraChangeListener(new OnCameraChangeListener() {
@Override
public void onCameraChange(CameraPosition arg0) {
...
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...
9个常用iptables配置实例 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...es -F
(or iptables --flush)
2.设置chain策略
对于filter table，默认的chain策略为ACCEPT，我们可以通过以下命令修改chain的策略：
iptables -P INPUT DROP
iptables -P FORWARD DROP
iptables -P OUTPUT DROP
以上命令配置将接收、转发和发出包均丢弃，...
“Full screen”
...
This answer solves how to make iframe occupy the whole screen
– Mark Ma
Oct 6 '13 at 4:24
You can ...
App Inventor 2 控制代码块 · App Inventor 2 中文网
...结果（evaluate but ignore result）
打开另一屏幕（open another screen）
打开另一屏幕并传值（open another screen with start value）
获取初始文本值（get plain start text）
获取初始值（get start value）
关闭屏幕（close screen）
关闭屏幕并返...
AI伴侣错误: invoke: no method named `AppName’ in class edu.mit.appinv...
原因：测试用的AI伴侣版本过旧（2.3版本，2015年的），使用最新版本的AI伴侣测试即可解决该问题。
参考英文社区：https://community.appinventor.mi ... nion3-screen1/60187
CMFCTabCtrl的使用、颜色样式调整 - C/C++ - 清泛网 - 专注C/C++及内核技术
...
tsingfun.com补充：
设置AutoColor后的Tab效果如图：
MDI默认Tab样式改为上图效果的代码如下（MainFrm.cpp）：
//CMDITabInfo mdiTabParams;
//mdiTabParams.m_style = CMFCTabCtrl::STYLE_3D_ONENOTE; // 其他可用样式...
//mdiTabParams.m_bActiveTabCloseButton =...
getting the screen density programmatically in android?
How to get the screen density programmatically in android?
19 Answers
19
...
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...