Hi Sunny Gupta,
thanks for your help, unfortunately your tip does not work.
In these days a read many topic about add libraries on extension,
es. How to add external libraries
Step 1,2,3 the library commons-lang3-3.10.jar is already in the appinventor-sources/appinventor/lib
Step 4 in the file components\build.xml i added copy toFile="${public.deps.dir}/commons-lang3.jar" file="${lib.dir}/commons-lang3/commons-lang3-3.10.jar"
Step 5 in my extension I added @UsesLibraries(libraries = "commons-lang3.jar")
When I compile i have this PARSE error
unjarExtensionLibraries:
[unzip] Expanding: C:\ai\appinventor\components\build\externalComponents-class\mifare.info\commons-lang3.jar into C:\ai\appinventor\components\build\externalComponents-class\mifare.info
jarAllExtensions:
jarExtension:
[jar] Building jar: C:\ai\appinventor\components\build\externalComponents-class\mifare.info.jar
ProGuard:
[copy] Copying 1 file to C:\ai\appinventor\components\build\externalComponents\mifare.info\files
[echo] Generated build file AndroidRuntime.jar [mifare.info]
dexAllExtensions:
dexExtension:
[java]
[java] PARSE ERROR:
[java] InvokeDynamic not supported
[java] ...while preparsing cst 0035 at offset 000000d2
[java] ...while parsing org/apache/commons/lang3/ArchUtils.class
[java] 1 error; aborting
[java] Picked up _JAVA_OPTIONS: -Xmx1024M
BUILD FAILED
C:\ai\appinventor\build.xml:46: The following error occurred while executing this line:
C:\ai\appinventor\components\build.xml:463: The following error occurred while executing this line:
C:\ai\appinventor\components\build.xml:476: Java returned: 1
I don't know how to solve
Best Regards
Marco