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使用虚拟现实和App Inventor进行实验 · App Inventor 2 中文网
...pp Inventor 不包含复制文件的操作。幸运的是，由于 Taifun Bär（谢谢 Taifun！），有一个 App Inventor 扩展，它提供了一个带有 TaifunFile.copy 操作的组件 TaifunFile。可以从此处下载扩展。您应该在构建 Expeditions 和 Virtuality 演示之前安装...
使用 XML 和 Web 服务 · App Inventor 2 中文网
...ng procedures step by step, while checking intermediate results, is a good idea when extracting data from complex XML structures, where there might be many steps and it’s hard to get a procedure correct on the first try.
切换 目录 ...
在 App Inventor 2 中使用图像 · App Inventor 2 中文网
...ices a dip may map to one pixel while on others it may be nine pixels. The idea is that most screens will have the same number of “dips” to an inch of screen real estate.
Developers can still give UI elements sizes in “pixels” in App Inventor, but realize those pixels are in fact dips.
Ima...
扩展App Inventor：具有多点触控和手势检测功能 · App Inventor 2 中文网
...The angle between two lines is the angle rotated by the user.
Figure 5. Idea of implementing rotation gesture. Blue points are the previous locations of fingers, and red points are the current locations of fingers. The angle rotated is the angle between the two lines formed by the fingers.
The a...
扩展App Inventor：具有多点触控和手势检测功能 · App Inventor 2 中文网
...The angle between two lines is the angle rotated by the user.
Figure 5. Idea of implementing rotation gesture. Blue points are the previous locations of fingers, and red points are the current locations of fingers. The angle rotated is the angle between the two lines formed by the fingers.
The a...
扩展App Inventor：具有多点触控和手势检测功能 · App Inventor 2 中文网
...The angle between two lines is the angle rotated by the user.
Figure 5. Idea of implementing rotation gesture. Blue points are the previous locations of fingers, and red points are the current locations of fingers. The angle rotated is the angle between the two lines formed by the fingers.
The a...
扩展App Inventor：具有多点触控和手势检测功能 · App Inventor 2 中文网
...The angle between two lines is the angle rotated by the user.
Figure 5. Idea of implementing rotation gesture. Blue points are the previous locations of fingers, and red points are the current locations of fingers. The angle rotated is the angle between the two lines formed by the fingers.
The a...
扩展App Inventor：具有多点触控和手势检测功能 · App Inventor 2 中文网
...The angle between two lines is the angle rotated by the user.
Figure 5. Idea of implementing rotation gesture. Blue points are the previous locations of fingers, and red points are the current locations of fingers. The angle rotated is the angle between the two lines formed by the fingers.
The a...
App Inventor 2 扩展 · App Inventor 2 中文网
... how to define the blocks for the
Blocks editor.
It would also be a good idea to look at the resources at the MIT App Inventor Open Source Web page. You might also want to participate in the MIT App Inventor Open Source Development group which is a good place to find advice on implementing compon...