Sources compile correctly but it doesn't build the DEX file

Open Source Development Extension Development
1

When I build the extension in the app inventor sources and add the jar library, the sources compile correctly but it doesn't build the DEX file.xxxx is class from jar.

 dexExtension:
 [java]
 [java] PARSE ERROR:
 [java] InvokeDynamic not supported
 [java] ...while preparsing cst 0100 at offset 0000049c
 [java] ...while parsing org.apache.xxxx.class
 [java] 1 error; aborting
2

The library you have used in one of your extension uses Java 8 features.

3

Oh, I can't use such libraries? So I need to look for an older version?

I see the information from app inventor source can work with java8.

4

Yes or you can use Rush. It supports desugaring libs.
You can manually desugar the lib too.

2 Likes
5

Ok, thanks. Is it the ant compiler's fault? Because if the sources are compatible with Java8, extensions should be too?

6

Honestly I never tried to find why ant gave that error. Instead I rollback to an older version whenever something like that happens.

7

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