Android-sdkV3.1, build ERROR!

[Tim_L_4]

1. Android Studio build Error info:

:src:sample:conferenceSample:generateDebugSources UP-TO-DATE
:src:sample:conferenceSample:compileDebugJavaWithJavac UP-TO-DATE
:src:sample:conferenceSample:compileDebugNdk UP-TO-DATE
:src:sample:conferenceSample:compileDebugSources UP-TO-DATE
:src:sample:conferenceSample:transformClassesWithDexForDebug
UNEXPECTED TOP-LEVEL EXCEPTION:
Error:Execution failed for task ':src:sample:conferenceSample:transformClassesWithDexForDebug'.
> com.android.build.api.transform.TransformException: com.android.ide.common.process.ProcessException: org.gradle.process.internal.ExecException: Process 'command '/usr/lib/jvm/jdk1.7.0_80/bin/java'' finished with non-zero exit value 2
Information:BUILD FAILED
Information:Total time: 5.433 secs
Information:1 error
Information:0 warnings
Information:See complete output in console

2. console cmd run Error:  under Ubuntu14.04 64BIT

./gradlew assembleRelease : info

UNEXPECTED TOP-LEVEL EXCEPTION:
com.android.dex.DexException: Multiple dex files define Lorg/webrtc/VideoCapturerAndroid$CameraErrorHandler;
    at com.android.dx.merge.DexMerger.readSortableTypes(DexMerger.java:594)
    at com.android.dx.merge.DexMerger.getSortedTypes(DexMerger.java:552)
    at com.android.dx.merge.DexMerger.mergeClassDefs(DexMerger.java:533)
    at com.android.dx.merge.DexMerger.mergeDexes(DexMerger.java:170)
    at com.android.dx.merge.DexMerger.merge(DexMerger.java:188)
    at com.android.dx.command.dexer.Main.mergeLibraryDexBuffers(Main.java:439)
    at com.android.dx.command.dexer.Main.runMonoDex(Main.java:287)
    at com.android.dx.command.dexer.Main.run(Main.java:230)
    at com.android.dx.command.dexer.Main.main(Main.java:199)
    at com.android.dx.command.Main.main(Main.java:103)

:src:sample:conferenceSample:transformClassesWithDexForRelease FAILED

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':src:sample:conferenceSample:transformClassesWithDexForRelease'.
> com.android.build.api.transform.TransformException: com.android.ide.common.process.ProcessException: org.gradle.process.internal.ExecException: Process 'command '/usr/lib/jvm/jdk1.6.0_45/bin/java'' finished with non-zero exit value 2

* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.

BUILD FAILED

Total time: 12.831 secs

Thanks!

[Chunbo_H_Intel1]

We've used the release package to build our samples, and it works well.
Please try to clean the environment and rebuild again.

PS. From v3.1 on, the libjingle_peerconnection.jar is included in woogeenbase.jar. Please don’t add dependency of libjingle_peerconnection.jar in applications.