Some problems about @UsesLibraries(libraries = "javaximageio.jar") in extension

Open Source Development
1

After I write @UsesLibraries(libraries = "javaximageio.jar") into the corresponding extension source file and compile it,the appinventor/components/build/externalcomponents-class folder contain javaximageio.jar package.

But it is not included in the .aix file, because the size of the .aix file is the same as not using @UsesLibraries(libraries = "javaximageio.jar").

Import .aix file and use it in the app inventor 2 project. An error will be reported after running: Java lang.NoClassDefFoundError: Failed resolution of: Ljavax/imageio/ImageIO;

how to solve it?
thanks.

2

You need to add entery (path) for that in build.xml file present in component/ directory. Need to add extra jar file in lib folder

3

For example you can see the Twitter component source code.

4

http://ai2.appinventor.mit.edu/reference/other/extensions.html

In this document you will find the guide to add external lib in extension.