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App Inventor 2 连接打印机（Printer），自定义打印的实现 - App Inventor ...
...安卓平台只能通过分享文件才能选择打印机App，而iOS版AI伴侣在分享消息时就可以直接预览打印消息内容，如下图:
iOS版分享消息
打印功能实现思路：
由于安卓平台分享消息的方式无法调出打印App，只能通过分享文...
AppInventor2 .keystore 证书文件 - App版本升级的奥秘 · App Inventor 2 中文网
...生成的签名都是不一样的，这就是不同机器编译出来的AI伴侣不能覆盖升级的原因！！
（密钥不一样、生成的时间戳不一样、证书序列号不一样）
秘钥的生成原理
没啥高深的技术，其实就是Java的工具包 keytoo...
使用App Inventor扩展实现多点触控：Rotation Detector · App Inventor 2 中文网
...et incorporated into the App Inventor release. But you can try some ofary AI2 server.
You can implement the RotationDetector.aix extension as described in part 2 below using the extension test send (2) may need to be rebuilt as the system evolves.
Contents
rver.
Keep in mind that the extensions...
使用App Inventor扩展实现多点触控：Rotation Detector · App Inventor 2 中文网
...et incorporated into the App Inventor release. But you can try some ofary AI2 server.
You can implement the RotationDetector.aix extension as described in part 2 below using the extension test send (2) may need to be rebuilt as the system evolves.
Contents
rver.
Keep in mind that the extensions...
使用App Inventor扩展实现多点触控：Rotation Detector · App Inventor 2 中文网
...et incorporated into the App Inventor release. But you can try some ofary AI2 server.
You can implement the RotationDetector.aix extension as described in part 2 below using the extension test send (2) may need to be rebuilt as the system evolves.
Contents
rver.
Keep in mind that the extensions...
使用App Inventor扩展实现多点触控：Rotation Detector · App Inventor 2 中文网
...et incorporated into the App Inventor release. But you can try some ofary AI2 server.
You can implement the RotationDetector.aix extension as described in part 2 below using the extension test send (2) may need to be rebuilt as the system evolves.
Contents
rver.
Keep in mind that the extensions...
使用App Inventor扩展实现多点触控：Rotation Detector · App Inventor 2 中文网
...et incorporated into the App Inventor release. But you can try some ofary AI2 server.
You can implement the RotationDetector.aix extension as described in part 2 below using the extension test send (2) may need to be rebuilt as the system evolves.
Contents
rver.
Keep in mind that the extensions...
做了个"外卖菜单选择器"App，才发现ListView和Spinner的区别这么...
...接设置元素属性就能自动更新。如果你用的是老版本的AI伴侣，可能还会遇到这个问题。
坑4：ListView的布局选择。 默认只显示文本，想每道菜旁边配一张图，需要在设计视图把布局属性改成"Image,MainText"之类的组合，然...
App Inventor 2开发计步器与定位器 - App Inventor 2 中文网 - 清泛IT论坛，有思想、有深度
...“应用说明”等属性设为“健身宝”，并在手机上运行AI伴侣进行测试连接。
注意：该程序需要用到手机内置的计步器传感器（或加速度传感器）和GPS传感器，请确保您的手机具备此功能（一般新手机都具有这几个功能，...
GIF Animated 扩展：可点击透明背景动画GIF播放器 · App Inventor 2 中文网
...为gif的话，设计视图中图片预览会展示动图，但是通过AI伴侣测试或编译成apk真机测试，就会发现图片不会动，只会展示静态图片。那么问题来了，如何展示动图/动画效果呢？有2种思路参考这里。
当然，也可以使用本文介绍的...