Unexpected reference to missing service class

[Basheer009]

I got this when building APK

Unexpected reference to missing service class: META-INF/services/javax.xml.stream.XMLEventFactory.
Unexpected reference to missing service class: META-INF/services/javax.xml.stream.XMLInputFactory.
Unexpected reference to missing service class: META-INF/services/javax.xml.stream.XMLOutputFactory.

[centic9]

With "building APK", you mean the test-app that is included in this project, right?

Which version of JDK are you using?

Any local changes?

Do you have the system properties in place that are described at https://github.com/centic9/poi-on-android#necessary-system-properties.

And please provide the full output if there is more.

[Basheer009]

Sorry for late reply, Building APK I mean creating a release, minifyEnabled true
and I have applied the proguard-rules.pro config as described in this repo

My JDK is 11.0.16
and Yes I have added the system properties like this:

System.setProperty("org.apache.poi.javax.xml.stream.XMLInputFactory", "com.fasterxml.aalto.stax.InputFactoryImpl"); System.setProperty("org.apache.poi.javax.xml.stream.XMLOutputFactory", "com.fasterxml.aalto.stax.OutputFactoryImpl"); System.setProperty("org.apache.poi.javax.xml.stream.XMLEventFactory", "com.fasterxml.aalto.stax.EventFactoryImpl");

in my App class which extends Application

Task :app:minifyReleaseWithR8
AGPBI: {"kind":"warning","text":"Unexpected reference to missing service class: META-INF/services/javax.xml.stream.XMLEventFactory.","sources":[{"file":"C:\AndroidProjects\CIDApp\app\build\intermediates\merged_java_res\release\base.jar"}],"tool":"R8"}
AGPBI: {"kind":"warning","text":"Unexpected reference to missing service class: META-INF/services/javax.xml.stream.XMLInputFactory.","sources":[{"file":"C:\AndroidProjects\CIDApp\app\build\intermediates\merged_java_res\release\base.jar"}],"tool":"R8"}
AGPBI: {"kind":"warning","text":"Unexpected reference to missing service class: META-INF/services/javax.xml.stream.XMLOutputFactory.","sources":[{"file":"C:\AndroidProjects\CIDApp\app\build\intermediates\merged_java_res\release\base.jar"}],"tool":"R8"}

[EliAgne]

Could you provide the MainActivity or app java, build gradle and proguard files? It's difficult to determine the issue with the information given.

[Basheer009]

in my proguard file:

`# for excel use

Apache POI

-dontwarn org.apache.**
-dontwarn org.openxmlformats.schemas.**
-dontwarn org.etsi.**
-dontwarn org.w3.**
-dontwarn com.microsoft.schemas.**
-dontwarn com.graphbuilder.**
-dontwarn javax.naming.**
-dontwarn java.lang.management.**
-dontwarn org.slf4j.impl.**
-dontwarn java.awt.**
-dontwarn net.sf.saxon.**
-dontwarn org.apache.batik.**
-dontwarn org.apache.logging.log4j.**

-dontnote org.apache.**
-dontnote org.openxmlformats.schemas.**
-dontnote org.etsi.**
-dontnote org.w3.**
-dontnote com.microsoft.schemas.**
-dontnote com.graphbuilder.**
-dontnote javax.naming.**
-dontnote java.lang.management.**
-dontnote org.slf4j.impl.**

-keeppackagenames org.apache.poi.ss.formula.function

-keep,allowoptimization,allowobfuscation class org.apache.logging.log4j.** { ; }
-keep,allowoptimization class org.apache.commons.compress.archivers.zip.* { ; }
-keep,allowoptimization class org.apache.poi.schemas.* { ; }
-keep,allowoptimization class org.apache.xmlbeans.* { ; }
-keep,allowoptimization class org.openxmlformats.schemas.* { ; }
-keep,allowoptimization class com.microsoft.schemas.* { *; }
`

my app java file at onCreate

System.setProperty("org.apache.poi.javax.xml.stream.XMLInputFactory", "com.fasterxml.aalto.stax.InputFactoryImpl"); System.setProperty("org.apache.poi.javax.xml.stream.XMLOutputFactory", "com.fasterxml.aalto.stax.OutputFactoryImpl"); System.setProperty("org.apache.poi.javax.xml.stream.XMLEventFactory", "com.fasterxml.aalto.stax.EventFactoryImpl");

This what i get when building release app

[centic9]

These are just warnings, right?

Is anything not working because of this or are you just curious about the warnings?

Android is missing some parts of normal JDK, this is why the setProperty()-calls are necessasry, the warnings might be remnants of this and may be hard to avoid here.

[centic9]

I have now excluded those files from the poi-shadow-all.jar to remove the warning.