java - "Bad class file magic" from setting up Android Studio for NDK -

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i'm setting project work androids ndk. have use experimental gradle plugin. gradle syncs without errors , make without errors. when try 'run app' gradle gives error message:

unexpected top-level exception: error:com.android.dx.cf.iface.parseexception: bad class file magic (cafebabe) or version (0034.0000) @ com.android.dx.cf.direct.directclassfile.parse0(directclassfile.java:472) @ com.android.dx.cf.direct.directclassfile.parse(directclassfile.java:406) @ com.android.dx.cf.direct.directclassfile.parsetointerfacesifnecessary(directclassfile.java:388) @ com.android.dx.cf.direct.directclassfile.getmagic(directclassfile.java:251) @ com.android.dx.command.dexer.main.parseclass(main.java:764) @ com.android.dx.command.dexer.main.access$1500(main.java:85) @ com.android.dx.command.dexer.main$classparsertask.call(main.java:1684) @ com.android.dx.command.dexer.main.processclass(main.java:749) ... 19 more

from previous questions can see might depend on me using java 8 , android requiring java 7. other projects compile , run without issue.

i missed this answer , code snippet solved problem. 

model {     android {         compileoptions.with {             sourcecompatibility = javaversion.version_1_7             targetcompatibility = javaversion.version_1_7         }         ... //rest of gradle code     } }

sloppy research side.


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