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GestureDetector 手势检测拓展：旋转、缩放和滑动手势检测，自定义手势识别...
...戏控制等需要手势交互的场景。
.aix 拓展下载：
cn.fun123.GestureDetector.aix
基本用法
旋转/缩放（绑定到 Canvas）：
在设计器中拖入 Canvas 画布组件
拖入 RotationDetector 或 ScaleDetector 组件
在 Screen.Initialize 中...
App Inventor 2 数据库方案全览：从本地存储到云端服务 - App应用开发 - 清...
...特点：接入 Supabase 后端服务（Auth + PostgreSQL + Storage + Edge Function），国内可以正常访问，只是速度偏慢些，可作为 Firebase 的平替
- 业务支撑级别：中大型网络数据及文件存储
Supabase 是开源的 Firebase 替代方案，基于 PostgreSQL，...
App Inventor 2 项目会自动保存吗？这两个操作很多人不知道 - App应用开发 ...
...自然就上去了。
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JUnit Testing Exceptions [duplicate]
...xample == null) {
throw new NullPointerException();
}
//do fun things with valid example here
}
Then, when you run this JUnit test you will get a green bar:
@Test(expected = NullPointerException.class)
public void constructorShouldThrowNullPointerException() {
Example example ...
Remove a prefix from a string [duplicate]
...
Cool! Note: the behavior of the new function is exactly as in this answer (returning the string unchanged if it does not start with prefix)
– Elazar
May 27 at 23:50
...
Using a ListAdapter to fill a LinearLayout inside a ScrollView layout
...
I use following code which replicate adapter functionality with ViewGroup and TabLayout. Good thing about this is that if you change your list and bind again, it will only affect changed items:
Usage:
val list = mutableListOf<Person>()
layout.bindChildren(list, ...
AppInventor2 .keystore 证书文件 - App版本升级的奥秘 · App Inventor 2 中文网
...-storepass "android" -validity 10000 -dname "CN=AppInventor for Android, O=fun123.cn, C=CN"
具体参数很简单，可以让AI辅助解析。其中，10000 是证书过期天数，也是安卓官方建议的值。
Android docs recommend “10000” as the expiration of days.
直接采用命...
App Inventor 2 连接方式：AI伴侣、模拟器、USB · App Inventor 2 中文网
...用 隐私策略和使用条款 技术支持 service@fun123.cn
Ruby : How to write a gem? [closed]
...mcutter.
Don't over think it, don't use hoe or other overkill tools, have fun, don't to anything I wouldn't do.
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App Inventor 2 列表的函数式编程 · App Inventor 2 中文网
...用 隐私策略和使用条款 技术支持 service@fun123.cn