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App Inventor 2 UrsPahoMqttClient 拓展 - 物联网轻量级MQTT协议 · App Inventor 2 中文网
...于我的 WebCam 项目，可以通过 MQTT 拍摄和发送 JPEG 图像。Android Camera API 将 JPEG 数据作为字节数组提供。PublishByteArray、SubscribeByteArray 和 PublishedByteArrayReceived 块可用于处理字节数组。
PublishByteArray
此块对应于 PublishEx 方法。这里...
How do you get the footer to stay at the bottom of a Web page?
...t of the header and footer must be known
2) Old versions of IE (IE8-) and Android (4.4-) don't support viewport units. (caniuse)
3) Once upon a time webkit had a problem with viewport units within a calc rule. This has indeed been fixed (see here) so there's no problem there. However if you're loo...
How are ssl certificates verified?
...aid, here is a REALLY IMPORTANT part to remember: your device/OS (Windows, Android, etc.) pretty much keeps a list of all major/trusted CA's and their PUBLIC KEYS (if you're thinking that these public keys are used to decrypt the signatures inside the certificates, YOU ARE CORRECT!).
Ok, if you read...
iOS 8 removed “minimal-ui” viewport property, are there other “soft fullscreen” solutions?
...t. This also helps dealing with other scrolling bugs found in both iOS and Android. It also means that you need to deal on how to update it, just note that;
I block over-scrolling when reaching the boundaries of the scroll. This one is a bit more deep in my code, but I think you can as well follow ...
The purpose of Model View Projection Matrix
...my, can u suggest any sample code for pan functionality in Opengl Es2.0 in Android using this Model View Projection Matrix if Possible. I refereed more links, i could not get any clear idea.if any sample code means, its easy to understand for me..
– harikrishnan
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How can I tell if a DOM element is visible in the current viewport?
...as tested on Internet Explorer 7 (and later), iOS 5 (and later) Safari, Android 2.0 (Eclair) and later, BlackBerry, Opera Mobile, and Internet Explorer Mobile 9.
function isElementInViewport (el) {
// Special bonus for those using jQuery
if (typeof jQuery === "function" && el...
Disable hover effects on mobile browsers
...u emulate devices in Chrome devtools. But it still doesn't work for Chrome Android :-(
– Sjeiti
Jan 1 '17 at 21:30
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Necessary to add link tag for favicon.ico?
...gt;
<link rel="icon" type="image/png" sizes="192x192" href="fav_icons/android-icon-192x192.pn">
<link rel="icon" type="image/png" sizes="32x32" href="fav_icons/favicon-32x32.png">
<link rel="icon" type="image/png" sizes="96x96" href="fav_icons/favicon-96x96.png">
<link rel="ic...
How do DATETIME values work in SQLite?
I’m creating Android apps and need to save date/time of the creation record. The SQLite docs say, however, "SQLite does not have a storage class set aside for storing dates and/or times" and it's "capable of storing dates and times as TEXT, REAL, or INTEGER values".
...
How do I install a custom font on an HTML site
...dern Browsers */
url('webfont.ttf') format('truetype'), /* Safari, Android, iOS */
url('webfont.svg#svgFontName') format('svg'); /* Legacy iOS */
}
body {
font-family: 'MyWebFont', Fallback, sans-serif;
}
For more info, see the article Using @font-face at CSS-tricks.com.
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