appinventor多个拓展导入导致编译出错：

报错内容：

App Inventor is unable to compile this project.
The compiler error output was
________Preparing application icon
________Creating animation xml
________Creating style xml
________Creating provider_path xml
________Creating network_security_config xml
________Generating adaptive icon file
________Generating round adaptive icon file
________Generating adaptive icon background file
________Generating manifest file
________Attaching native libraries
________Attaching Android Archive (AAR) libraries
________Attaching component assets
________Invoking AAPT
AAPT time: 1.194 seconds
________Compiling source files
(compiling appinventor/ai_anon15341457595353/X1/Screen1.yail to appinventor.ai_anon15341457595353.X1.Screen1)
(compiling appinventor/ai_anon15341457595353/X1/Screen2.yail to appinventor.ai_anon15341457595353.X1.Screen2)
(compiling /tmp/runtime4861915752511037724.scm to com.google.youngandroid.runtime)
Kawa compile time: 2.075 seconds
________Invoking DX
DX time: 34.843000 seconds
YAIL compiler - DX execution failed.

问题查找：

这里就是我出现问题的原因：

外部库（jar文件）必须在项目中是唯一的。如果一个项目导入多个扩展，那么两个不同的扩展不能导入同一个jar文件。

我这边使用了几个拓展，都使用了相同的库文件，导致编译出错！