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App Inventor 2 UDP网络通信教程 - 发送和接收UDP数据包 · App Inventor 2 中文网
...unity.kodular.io 搜索 “UDP”
自行开发扩展：如果你有 Java/Android 开发基础，可以基于 java.net.DatagramSocket 开发自定义 UDP 扩展
导入扩展
在 App Inventor 2 设计视图左下角，找到 “扩展”（Extensions） 区域
点击 ...
BLE 低功耗蓝牙调试助手：扫描、连接、读写、订阅通知（附 .aia 源码） · ...
...伴侣或编译安装到手机，首次扫描时允许「附近设备」（Android 12+）或「位置信息」权限。
扫描：点「开始扫描」，15 秒后自动停止。附近设备按信号强弱排序，没有名字的显示为「（未命名设备）」。
中途验证：列表里应...
getApplicationContext(), getBaseContext(), getApplication(), getParent()
...lication() is available to Activity and Services only. Although in current Android Activity and Service implementations, getApplication() and getApplicationContext() return the same object, there is no guarantee that this will always be the case (for example, in a specific vendor implementation).
So...
Getting a File's MD5 Checksum in Java
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Doesn't work for me in my android code I get this error...java.lang.NoSuchMethodError: org.apache.commons.codec.binary.Hex.encodeHexString at org.apache.commons.codec.digest.DigestUtils.md5Hex(DigestUtils.java:215)
– JPM
...
Download a file from NodeJS Server using Express
...);
});
function readApp(req,res) {
var file = req.originalUrl == "/read-android" ? "Android.apk" : "Ios.ipa",
filePath = "/home/sony/Documents/docs/";
fs.exists(filePath, function(exists){
if (exists) {
res.writeHead(200, {
"Content-Type": "application/octet-s...
FFMPEG (libx264) “height not divisible by 2”
...
LordNeckbeard has the right answer, very fast
-vf scale=1280:-2
For android, dont forget add
"-preset ultrafast" and|or "-threads n"
share
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improve this answer
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fo...
FloatingActionButton 扩展：悬浮操作按钮扩展，可自定义颜色、大小、位置...
...后更新：2025年6月15日
JDK 版本：11
最低 API 级别：21（Android 5.0）
构建工具：FAST-CLI v3.6.1
兼容性
平台：App Inventor 2、Kodular、Thunkable
最低 Android 版本：Android 5.0 (Lollipop) API 21
测试状态：已在多个平台...
How many Activities vs Fragments?
...ink the pattern you're describing is from the original Google sample code: android-developers.blogspot.com/2011/02/… I think ActionBarSherlock just ported the Google demo code to use ABS classes.
– Dan J
Nov 25 '13 at 19:41
...
Popup弹出菜单扩展 · App Inventor 2 中文网
...整个屏幕，而且配置视图的选项很少。这里介绍的扩展是Android弹出菜单的包装器。几乎所有属性都是可调的。
默认主题
黑色主题
功能概述
Popup弹出菜单扩展是一...
How to lock orientation during runtime
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This doesn't address the OQ, at least on Android >= 16. setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_NOSENSOR) might set the device to landscape even if it was in portrait, whereas the question refers to locking orientation that was given.
...